Lectronics VR Field User manual

VR Field
Digital Hybrid Wireless™
Portable Modular Receiver System
Digital Hybrid Wireless
U.S. Patent 7,225,135
REFERENCE MANUAL
Rio Rancho, NM, USA
www.lectrosonics.com
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VR Field Receiver
LECTROSONICS, INC.
2

Modular Digital Hybrid Wireless™ Receiver
Rio Rancho, NM 3
Table of Contents
Introduction.............................................................................................................................................................................................5
VR Field Functional Block Diagram ......................................................................................................................................................5
VR Field ................................................................................................................................................................................................5
Antenna Multicoupler.........................................................................................................................................................................5
Microprocessor Control .....................................................................................................................................................................6
Frequency Tuning Groups .............................................................................................................................................................6
Digital Signal Processor ....................................................................................................................................................................6
Compatibility Modes......................................................................................................................................................................6
Ratio Diversity and Frequency Diversity Reception.......................................................................................................................6
DSP-Based Pilot Tone ...................................................................................................................................................................6
(SmartNR™) Smart Noise Reduction ............................................................................................................................................7
Audio Output Amplifiers.....................................................................................................................................................................7
Headphone Mixer and Amp...............................................................................................................................................................7
VRS and VRT Modules.........................................................................................................................................................................7
PLL and VCO Circuits .......................................................................................................................................................................7
Switched Diversity Reception............................................................................................................................................................7
RF Front-End and Mixer (VRS Module) ............................................................................................................................................7
RF Frequency Tracking Front-End and Mixer (VRT Module).............................................................................................................7
IF Amplifiers and SAW Filters............................................................................................................................................................7
Digital Pulse Counting Detector ........................................................................................................................................................7
Power Supply ........................................................................................................................................................................................8
VRS Functional Block Diagram.............................................................................................................................................................8
VRT Functional Block Diagram.............................................................................................................................................................8
VR Field System Controls and Functions ............................................................................................................................................9
Front Panel Controls and Functions......................................................................................................................................................9
POWER Button .................................................................................................................................................................................9
Function Button .................................................................................................................................................................................9
LCD Screen.......................................................................................................................................................................................9
PUSH FOR MENU/SELECT Rotary Control.....................................................................................................................................9
LEVEL Control...................................................................................................................................................................................9
PHONES Jack...................................................................................................................................................................................9
Receiver Select Buttons....................................................................................................................................................................9
BACK Button .....................................................................................................................................................................................9
Rear Panel Features...........................................................................................................................................................................10
Power Input Jack .............................................................................................................................................................................10
Receiver Modules............................................................................................................................................................................10
XLR Audio Output Jacks .................................................................................................................................................................10
RS-232 Port.....................................................................................................................................................................................10
Antenna Input Jacks........................................................................................................................................................................10
Antenna Output Jacks .....................................................................................................................................................................10
USB Port .........................................................................................................................................................................................10
LCD Interface ........................................................................................................................................................................................11
Types of Information Displayed ...........................................................................................................................................................11
Powerup Screens ............................................................................................................................................................................11
Overview Screen .............................................................................................................................................................................11
Powerup Screen Sequence.............................................................................................................................................................11
Receiver Detail Screen....................................................................................................................................................................12
Tuning a Receiver Module with the LCD .........................................................................................................................................12
Tuning Group Select Shortcut .........................................................................................................................................................12
Receiver Info Screen.......................................................................................................................................................................12
Button..............................................................................................................................................................................................13
Tuning Group...................................................................................................................................................................................13

VR Field Receiver
LECTROSONICS, INC.
4
LCD Menus and Setup Screens (Descriptions and Functions)........................................................................................................13
Top Menu ............................................................................................................................................................................................13
Setup Menus ...................................................................................................................................................................................13
Setup Screens.................................................................................................................................................................................13
SetUpRx Menu....................................................................................................................................................................................13
Level Setup Screen .........................................................................................................................................................................13
Phase Setup Screen .......................................................................................................................................................................14
TxBatt Setup Screen .......................................................................................................................................................................14
SmartNR Setup Screen...................................................................................................................................................................15
PilotBP Setup Screen......................................................................................................................................................................16
Compat Setup Screen.....................................................................................................................................................................16
Pilot BP Shortcut .........................................................................................................................................................................16
Tuning Setup Screen.......................................................................................................................................................................17
User Programmable Frequency Group Behavior ........................................................................................................................17
Adding/Deleting User Programmable Frequency Group Entries.................................................................................................17
DivMode Setup Screen ...................................................................................................................................................................18
SmartDiversity™ .........................................................................................................................................................................18
OptiBlend™.................................................................................................................................................................................18
Frequency Diversity.....................................................................................................................................................................19
LockSet Setup Screen ........................................................................................................................................................................19
Scan Function.....................................................................................................................................................................................20
Scan Mode ......................................................................................................................................................................................20
Stop Mode.......................................................................................................................................................................................21
Zoom Mode .....................................................................................................................................................................................21
CmdView Screen ................................................................................................................................................................................21
Frequency Coordination ......................................................................................................................................................................22
Frequency Compatibility Chart............................................................................................................................................................22
Frequency Compatibility Diagram.......................................................................................................................................................23
Using the Scan Function.....................................................................................................................................................................24
Call Lectrosonics.................................................................................................................................................................................24
Antenna Use and Placement ...............................................................................................................................................................25
Phantom Power for Remote Antenna Amplifiers...............................................................................................................................25
VR Field Replacement Parts and Accessories ..................................................................................................................................26
Troubleshooting....................................................................................................................................................................................27
Specifications .......................................................................................................................................................................................30
Service and Repair ...............................................................................................................................................................................31
Returning Units for Repair ..................................................................................................................................................................31
Limited One Year Warranty................................................................................................................................................... Back Cover

Modular Digital Hybrid Wireless™ Receiver
Rio Rancho, NM 5
Introduction
Lectrosonics Digital Hybrid Wireless™systems use in-
novative technology to combine the new advantages of
digital audio with the classic advantages of analog RF
transmission. A proprietary algorithm encodes the digi-
tal audio information into an analog format which can
be transmitted in a robust manner over an analog FM
wireless link. The receiver employs the latest filters, RF
amplifiers, mixers and detector to capture the encoded
signal and a DSP (Digital Signal Processor) recovers
the original digital audio.
This digital/analog hybrid technique has some very
beneficial properties. Because the information being
transmitted is digitally encoded, immunity to noise is
much higher than a compandor can offer, and, since the
encoded audio is sent in analog format, spectral and
power efficiency and operating range are not compro-
mised.
The VR Field System introduces a new flexibility to
Digital Hybrid Wireless™design. The modular design
operates with all Digital Hybrid Wireless™transmitters,
and a variety of analog transmitters. It consists of a VR
Field Receiver Master (VRF) that includes an antenna
multicoupler, computer communications interface,
microprocessor, digital signal processor (DSP), A-D and
D-A converters and audio output circuits, plus mechani-
cal rack mounting for up to six receiver modules.
The system can be setup and operated either through
front panel controls and display, or via rear panel USB
or RS232 ports connected to a Windows™2000, XP or
Vista based computer system and VRpanel, which is
part of the LecNet2™software package. (See VR Field
Installation Guide, or VRpanel Help.)
VR Field
Each VR Field spans two frequency blocks and sup-
ports from one to six receiver modules. (See Specifica-
tions.) System setup and control is handled by the VRF
with the receiver modules handling frequency reception,
conversion and signal detection.
Antenna Multicoupler
There are two independent antenna multicouplers. One
supports input from the rear panel Antenna A BNC
jack and the other supports input from the rear panel
Antenna B BNC jack.
The individual antenna inputs pass through a 50 MHz
bandpass filter centered on the VRM’s assigned fre-
quency block range prior to entering the associated
multicoupler. Each of the multicouplers includes a high
intercept amplifier whose output feeds a seven-way
splitter. Six of the splitter’s outputs are presented to the
respective Ant A or Ant B tabs on each of the receiver
module connectors. A seventh output is fed to a rear
Antenna (A or B) OUT connector for use by other VR
Field Receiver Systems.
VRField Functional Block Diagram
See VRS and VRT Functional Block Diagrams

VR Field Receiver
LECTROSONICS, INC.
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The result is that the same signal entering the rear
panel Antenna Inputs is presented to each receiver
module and to the pass-through rear panel Antenna
Output jacks. The design allows each receiver module
to be used independently.
Microprocessor Control
System setup parameters and control signals from DSP
are used by an 8-bit microprocessor to both set up and
control the VR Field System in general and to control
each individual receiver module (or receiver module
pair if they are used in ratio or frequency diversity
mode).
Initial system setup and control can be accomplished
through front panel controls, or via software using
convenient USB or RS-232 I/O ports. The setup pa-
rameters plus control signals from the DSP are used to
control the installed receiver modules, audio processing
and audio output.
The microprocessor also receives RF signal strength
information from each receiver module and information
from the DSP concerning transmitter operation. This
information is used both to control the VR Field System
and to display current status in various LCD menus or
setup screens. (See VR Field System Controls and
Functions, and Menus and Setup Screens.)
Frequency Tuning Groups
The VR Field System provides four factory preset in-
termodulation free frequency groups (A through D) and
two user programmable frequency groups (U and V).
The factory groups have been selected to avoid inter-
modulation problems. Each factory group contains
eight frequencies.
The user programmable frequency groups can have up
to 16 frequencies per group, per frequency block.
Digital Signal Processor
The analog detector output from each receiver module
is digitized and sent to a DSP. The DSP processes
the digitized detector output according to the active
settings. These signals include Compatibility Modes,
Diversity Modes and SmartNR™modes.
The DSP also detects the Pilot Tone used to control
the receiver module’s squelch (only in 400 Series, 200
Series and IFB Compatibility Modes – see DSP-Based
Pilot Tone).
In addition to the audio, a 1 kHz tone is also available
from the DSP. This tone is used to preset the VR Field
System’s audio output levels according to the input re-
quirements of any attached equipment and for diagnos-
tic purposes. (See Level Setup Screen.)
Each of the six audio channels is then sent through its own
D-A converter to recover the original analog audio. The
analog audio is then sent to both the appropriate Audio
Output Amplifier and to the Headphone Mixer and Amp.
Note: While all audio channels are sent to the
respective Audio Output XLR jacks, only one audio
channel at a time may be monitored via the front
panel PHONES jack. (See Headphone Mixer and
Amp.)
Compatibility Modes
The VR Field System was designed to be compatible
with Lectrosonics Digital Hybrid (400 Series) transmit-
ters and will yield the best performance when operating
in Digital Hybrid mode. However, due to the flexibility
of digital signal processing, the VR Field System is
also able to operate with Lectrosonics 200 Series, 100
Series and IFB transmitters, and certain non-Lectroson-
ics transmitters in special compatibility modes. (Contact
the Lectrosonics Sales Department for a complete list
of compatible transmitters.)
Ratio Diversity and Frequency Diversity Reception
Both ratio diversity (OptiBlend™) and Frequency Diver-
sity combine the outputs of two adjacent receivers.
OptiBlend™is a ratio diversity method which combines
the audio output from two adjacent receiver modules
(1-2, 3-4 or 5-6) relative to the RF signal input levels at
both receivers.
Frequency Diversity pairs two transmitters with two
adjacent receiver modules. (The receiver pair combina-
tions are the same as those used for OptiBlend: 1-2,
3-4 or 5-6.) Each transmitter/receiver combination in
the pair is tuned to a different frequency. The RF signal
level at each receiver is monitored and the audio is
blended in a manner similar to ratio diversity.
In both cases, because of the mixing function, the
blended audio is duplicated at each XLR jack associ-
ated with the receiver pair. (See also Switched Diversity
Reception.)
DSP-Based Pilot Tone
The 400 Series, 200 Series and IFB systems use a
DSP generated ultrasonic pilot tone from the transmitter
to control the receiver audio muting (squelch). The DSP
monitors all incoming audio and generates a Pilot Tone
Detect signal if a pilot tone is detected. The Pilot Tone
Detect signal is routed to the microprocessor to enable
or disable squelch depending on the PilotBP setting
for that receiver module. (See PilotBP Setup Screen.)
Squelching is performed in the DSP.
In 400 Series mode, the pilot tone frequency is differ-
ent for each of the 256 frequencies in the tuning range
of a system (frequency block). This eliminates squelch
problems in multichannel systems such as the VR Field
System which use a common antenna and where a
pilot tone signal can appear in the wrong receiver via
intermodulation products. Using the DSP to detect the
pilot tone also eliminates the need for fragile crystals.
In 200 Series and IFB modes, only one pilot tone fre-
quency is used on all channels, emulating the original
crystal-based system. In other compatibility modes (100
Series and Mode 3), no pilot tone is used.

Modular Digital Hybrid Wireless™ Receiver
Rio Rancho, NM 7
(SmartNR™) Smart Noise Reduction
While the VR Field System has been designed using
the best available low noise components and tech-
niques, the wide dynamic range of Digital Hybrid tech-
nology, combined with flat response to 20 kHz, makes
it possible to hear the noise floor in the mic preamp, or
the (usually) greater noise from the microphone itself in
certain conditions. The SmartNR™ algorithm reduces
this noise without sacrificing high frequency response,
thus increasing the effective dynamic range of the
system.
The Smart Noise Reduction algorithm works by at-
tenuating only those portions of the audio signal that fit
a statistical profile for randomness or “electronic hiss.”
It offers significantly increased transparency over the
sophisticated variable low pass filters used in previous
Lectrosonics designs. Desired high frequency signals
having some coherence such as speech sibilance and
other tones are not affected.
Note: The SmartNR setting is user selectable
only in 400 Series mode. In other modes, noise
reduction is applied in such a way as to emulate
the original analog system as accurately as
possible and is not user adjustable.
Audio Output Amplifiers
The six digitally controlled Audio Output Amplifiers are
adjustable from -15 dBu to +8 dBu in 1 dB increments.
There is one Audio Output Amplifier per XLR jack.
Headphone Mixer and Amp
The Headphone Mixer and Amp is used to monitor the
audio output through the front panel PHONES jack. Au-
dio output levels at this jack are controlled only by the
front panel LEVEL control. Only one channel can be
monitored at a time. That channel is selected through
one of six front panel Receiver Module pushbuttons. If
the selected receiver module is part of a ratio diver-
sity or frequency diversity pair, the audio outputs are
blended and the audio is presented to both XLR Audio
Output jacks for the diversity pair and the front panel
PHONES jack.
Note: The front panel LEVEL control has no effect
on the output levels at the rear panel XLR Audio
Output jacks. Likewise, the software controlled
audio output levels at the XLR jacks (via the
VRpanel GUI or the LCD) has no effect on the
levels at the front panel PHONES jack.
VRS and VRT Modules
Both the VRS (Venue Receiver Standard) and VRT
(Venue Receiver Tracking) modules are individual high
performance, triple-conversion, frequency synthesized
UHF receivers controlled by the DSP. The VRT mod-
ules include an RF frequency tracking front end.
PLL and VCO Circuits
Each receiver module is frequency agile and can be set
to operate on any one of 256 frequencies within its tun-
ing range. The PLL synthesizer receives instructions
from the microprocessor, then uses those instructions
to set the receiver module’s operating frequency by
controlling the 1st and 2nd Voltage Controlled Oscilla-
tors (VCO).
Switched Diversity Reception
All installed receiver modules can operate as switched
diversity receivers. Switched diversity (or SMART
Diversity™) minimizes dropouts in situations where
multi-path reflections can cause serious problems. The
phase diversity switch is controlled by the VRM micro-
processor using a sophisticated algorithm that ensures
antenna phase switching is performed at optimal times.
RF Front-End and Mixer (VRS Module)
A tuned LC filter before and after a low noise, high
current RF amplifier provides good selectivity. The first
mixer uses GaAs technology with a very high third order
intercept point. The overall design ensures stability,
selectivity and precise gain in order to handle strong RF
signals without input overload.
RF Frequency Tracking Front-End
and Mixer (VRT Module)
The VRT module includes two RF frequency tracking
filters controlled by the microprocessor to increase se-
lectivity. A high current RF amplifier before the second
tracking filter increases sensitivity while maintaining
excellent IM performance. The high level first mixer
provides a very high third order intercept point. The
overall design ensures stability, selectivity and pre-
cise gain in order to handle strong RF signals without
input overload. The increased selectivity provided by
the tracking filters is highly beneficial in congested RF
environments.
IF Amplifiers and SAW Filters
The first IF low noise amplifier is controlled with feed-
back regulation and drives a quartz SAW (Surface
Acoustical Wave) filter. The 244 MHz SAW filter com-
bines sharp tuning, constant group delay, wide band-
width and excellent temperature stability, far superior to
conventional LC filters. The second mixer converts the
244 MHz first IF signal down to 10.7 MHz. The second
IF is filtered through two ceramic filters for sharp selec-
tivity, then converted down to 300 kHz and fed to the
Digital Pulse Counting Detector.
Digital Pulse Counting Detector
Each module uses an elegantly simple, yet highly effec-
tive digital pulse detector to demodulate the FM signal,
rather than a conventional quadrature detector. This
unusual design eliminates thermal drift, improves AM
rejection, and provides very low audio distortion. The
output from the Digital Pulse Counter is an analog signal
which is fed through a low pass filter and on to the VRM.

VR Field Receiver
LECTROSONICS, INC.
8
Power Supply
The VR Field System can be operated from a single
NP1-type battery, or an external DC power source with
a range of +10 VDC (1.2 A) to +18 VDC (700 mA).
(A +15 DCV, 1.23 amp power source is supplied with
each unit.) The receiver has a built-in Poly-Fuse to
protect the unit. If a problem occurs that trips this fuse,
it will reset after the power supply is disconnected
for about 15 seconds.
Note: To use external power, temporarily
disconnect the power supply cable that
connects the battery to the master unit.
VRS Functional Block Diagram
VRT Functional Block Diagram
For Internal Power, the VR FIeld
uses a single NP1-type battery
(available from most
pro audio/video suppliers).

Modular Digital Hybrid Wireless™ Receiver
Rio Rancho, NM 9
Front Panel Controls and Functions
The VR Field System consists of a VRF (VR Field
Master) and one to six individual receiver modules. The
VRF front panel provides an easy-to-use LCD interface
for system setup, monitoring and troubleshooting. Dur-
ing normal operation, the LCD shows RF and audio lev-
els, diversity status, pilot tone status (where applicable)
and transmitter battery status (when available) for all six
receivers at the same time. Individual screens for each
receiver are also available to provide additional informa-
tion and make adjustments.
Individual output channel audio can be monitored via
the front panel.
POWER Button
The POWER button is used both to control the applica-
tion of power to the unit and to clear (or reset) the Scan
Mode spectrum analyzer.
Pressing and holding the POWER button for at least
two seconds turns the unit off.
Function Button
Used for special functions in selected Setup Screens.
LCD Screen
The LCD Screen is a graphics-type Liquid Crystal Dis-
play used to set up and monitor system operation. (See
LCD Interface.)
PUSH FOR MENU/SELECT Rotary Control
The PUSH FOR MENU/SELECT (hereafter called
the MENU/SELECT control) is a dual function control
for navigating and selecting Setup Menus or Setup
Screens, and for setting parameters within the Setup
Screens.
VR Field System Controls and Functions
LEVEL Control
The LEVEL control is used to adjust the output level of
the front panel PHONES jack.
PHONES Jack
The stereo PHONES jack is provided for monitoring
the audio output of selected receivers. Only the audio
from a single receiver (or diversity pair) selected via the
Receiver Select Buttons will be present at this jack.
Receiver Select Buttons
The six Receiver Select buttons are used to select indi-
vidual installed receiver modules either for monitoring
via the PHONES jack, or for setup and adjustment.
BACK Button
The BACK button is used to return to the previous
menu or setup screen.
Pressing the BACK button from the SetUpRx menu
returns to whatever screen was active prior to entering
SetUpRx.
NP1 Type Battery
The VR Field can be powered by any type of NP1-style
battery, an industry-standard battery that is readily
available from pro audio/video suppliers.
Dust Cover
The see-through dust cover swings open when the
controls need to be accessed, and swings into place
providing a protective barrier between the controls and
the elements. It also provides protection against acci-
dental adjustments.
Front Panel
POWER Button
LEVEL Control
LCD Screen
PHONES Jack
Receiver Select
Buttons
Function Button
BACK Button
PUSH FOR MENU/SELECT
Rotary Control
NP1 Type Battery Dust Cover

VR Field Receiver
LECTROSONICS, INC.
10
Rear Panel Features
The rear panel provides six balanced XLR audio out-
puts, two 50 Ohm BNC antenna inputs, two 50 Ohm
BNC antenna outputs from an internal multicoupler, a
power jack with a locking connector, and USB and RS-
232 serial ports.
Power Input Jack
The power input jack accepts +10 VDC to +18 VDC
(center pin is positive and sleeve is ground). The input
is diode protected to prevent damage if the power is
accidentally applied with reversed polarity. The unit will
not operate until the correct polarity is restored.
Receiver Modules
Up to six receiver modules in two rows of three can be
installed in each VRM. Spring loaded Receiver Module
Retainer Clips ensure module connections are main-
tained during transport and installation.
XLR Audio Output Jacks
Six balanced audio output jacks using standard XLR
connectors are provided to connect the VR Field Sys-
tem to external equipment.
RS-232 Port
A serial RS-232 interface is provided for setup and
control of the VR Field System from computers or other
devices using industry standard RS-232 communication
links.
Antenna Input Jacks
Two BNC input connectors are provided for right-angle
whip antennas, cables from remote antennas, or cables
from another VRM. An internal mulitcoupler ensures
the RF is applied equally to all installed Receiver Mod-
ules and also to the Antenna Output Jacks.
Antenna Output Jacks
Two pairs of 50 Ohm BNC output jacks provide zero-
gain antenna “loop-throughs” for an additional receivers,
allowing convenient expansion without the need for an
external RF multicoupler or additional antenna systems.
Note VR Field Systems can be looped together
successfully only when they cover the same
frequency block range. Units outside of the
frequency block range will experience substantial
signal loss and very short operating range.
USB Port
Standard USB Version 1.1 connector for setup and
control of the VRM from computer systems (Windows®
2000, XP or Vista) with a USB interface.
Rear Panel
Receiver
Modules 4-6
(Inside)
XLR Audio Output Jack
(Receiver 1)
XLR Audio Output Jack
(Receiver 2)
XLR Audio Output Jack
(Receiver 3)
XLR Audio Output Jack
(Receiver 6)
XLR Audio Output Jack
(Receiver 5)
XLR Audio Output Jack
(Receiver 4)
Receiver
Modules 1-3
(Inside)
USB Port
Antenna (B) Input
Antenna (B) Output
Antenna (A) Input
Antenna (A) Output
RS-232 Port Power Input Jack

Modular Digital Hybrid Wireless™ Receiver
Rio Rancho, NM 11
While the software supplied with the VR Field System
may make setting up and operating the system quicker
and more efficient, the system can also be completely
set up and controlled via the front panel LCD and con-
trols. Direct interaction is provided using the front panel
controls and the LCD. A variety of menus and setup
screens are provided to assist with the setup and also
to allow for changing all parameters without the need to
connect a computer system.
The main components of the LCD interface are the
Function Button, BACK Button, Receiver Select But-
tons, MENU/SELECT rotary encoder/switch and the
LCD.
Note: Adjustments made through the LCD
interface are performed in real time. As each
setting is made, the results will be immediately
observed.
Types of Information Displayed
The information displayed via the front panel LCD
includes: powerup screens, receiver screens, TopMenu,
setup menus and setup screens (including scanning
functions).
Powerup Screens
A series of three screens is displayed when the unit
is first turned on. These Powerup screens identify the
firmware version and block configuration of the VRM
and installed receiver modules. They are followed by
the Overview Screen which displays the operating sta-
tus of the installed receiver modules.
Overview Screen
The Overview Screen, which appears after the Powerup
Sequence is completed, is the normal display during
operation. This screen is sectioned into six equal col-
umns, one for each receiver module location. Any given
column displays information about the corresponding
receiver module. This information includes relative
audio levels, antenna phase, pilot tone
LCD Interface
Powerup Screen Sequence
Initial screen identifies firmware version and the operat-
ing frequency range of the system (Block Range). The
blocks have to be contiguous.
The second screen provides information for the user
that the VRM is detecting all installed receiver modules
within the designated operating range. (Modules out-
side of the block range identified in the first screen will
not be detected.)
The third screen identifies all installed receiver mod-
ules within the system’s block range. Empty receiver
slots, or slots with receiver modules outside of the block
range identified in the first screen, will have an “X” dis-
played instead of frequency block number.
The Powerup sequence is followed by the Overview
Screen.
Overview Screen
Individual Receivers
1 2 3 4 5 6
Battery Monitor
Pilot Tone
Monitoring
Status
Relative RF Signal Strength
Relative Audio Level
Antenna Phase
Firmware
Version
Block Range
Function Button
Receiver Select Buttons
MENU/SELECT
Switch
LCD
BACK Button

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LECTROSONICS, INC.
12
monitoring status, the battery status of the associated
receiver (relative charge left or time of operation) and
the relative RF signal strength.
The receiver modules are numbered one through six
and correspond to the following physical layout:
Receiver Detail Screen
Pressing a front panel Receiver Select Button opens
the corresponding Receiver Detail Screen. This screen
displays more detailed information about the selected
receiver and is used for setting the operating frequency
of the selected Receiver Module and offering informa-
tion such as transmitter Frequency Select Switch set-
tings, RF signal strength and audio attenuator level, etc.
This screen is also the only means for tuning a receiver
module.
Tuning a Receiver Module with the LCD
There are several methods to set the operating frequen-
cy for individual receiver modules. (See also DivMode
Setup Screen.)
If there is no indication for a Tuning Mode for the select-
ed receiver module, then rotating the MENU/SELECT
control allows the selection of any of the 256 available
frequencies. Stopping at any frequency sets the se-
lected receiver module to that channel in real-time.
If there is an indication that one of the group tuning
modes is active for the selected receiver module, then
rotating the MENU/SELECT control selects only the
frequencies that are part of the selected Tuning Group.
(See Tuning Setup Screen for information.) Stopping at
any of the freselected channels sets the receiver mod-
ule to that frequency in real-time.
The operating frequency of a receiver module can also
be set through the Scan Function. (See Scan Function
for more information.)
Tuning Group Select Shortcut
To instantly select or change a Tuning Group from the
Receiver Detail Screen, hold the FUNCTION button,
then press a Receiver Select button according to the
chart below:
Receiver Info Screen
From the Receiver Detail Screen, pressing the front
panel Receiver Select Button for the selected Receiver
Module again displays the Receiver Info Screen. This
screen temporarily displays the receiver module loca-
tion, operating frequency block, compatibility mode, out-
put audio level and transmitter battery condition. This
can be a voltage level or an elapsed time depending on
the TXBatt set up. (See TxBatt.) After approximately
five seconds, the display returns to the Receiver Detail
Screen.
The Level setting on this screen is a user-selectable
audio output attenuator setting and should not be
confused with the instantaneous Audio Output Level
displayed in the Receiver Detail Screen. The latter is a
measure of the channel’s instantaneous audio output
level.
Receiver Info Screen
Receiver Module Location Operating Frequency Block
Compatibility ModeAudio Attenuator Level
Transmitter Battery
Status
Receiver Detail Screen
Receiver Module
Location
Pilot Tone
Monitoring Status
Operating
Frequency
RF Signal
Strength
Antenna Phase
Battery Monitor TV Channel
Audio Level Meter
Tuning Mode
Transmitter Frequency
Select Switch Settings
Button Tuning Group
BACK
Receiver Select 1
Receiver Select 2
Receiver Select 3
Receiver Select 4
Receiver Select 5
Receiver Select 6
No Group
Group A
Group B
Group C
Group D
Group U
Group V
Bottom View of VRF Chassis
VRF Rear Panel
VRF Front Panel

Modular Digital Hybrid Wireless™ Receiver
Rio Rancho, NM 13
SetUpRx Menu
The SetUpRx menu accesses the setup screens used
to control the operation of the receiver modules. These
include: audio level, antenna phase, transmitter battery
condition, noise reduction, pilot tone/squelch bypass,
compatibility mode, tuning group selection and diversity
mode.
Rotate the MENU/SELECT control to highlight a menu
item, then press the control to access it.
While each setup screen affects a different setup
parameter, they all follow the same basic design. They
identify the setup item, selected receiver module and
setup parameters, plus any special functions that are
affected by the front panel Function pushbutton.
Six boxes are also displayed along the bottom of each
setup screen with one box highlighted. These boxes
correspond to the installed receiver modules. The high-
lighted box is the currently selected module. Each box
displays the parameter setting for one receiver module.
Pressing a front panel Receiver Select button selects
the corresponding receiver module as the current mod-
ule, allowing modification of that module’s parameters.
Level Setup Screen
The Level setup screen displays the audio output level
setting of the selected receiver. The output range is
from -15 dBu to +8 dBu in 1 dB increments. The Level
Setup Screen displays the selected receiver, audio
output level setting and reference tone status.
Top Menu
The Top Menu is accessed from the Overview Screen
by pushing the MENU/SELECT rotary control. Rotating
this control navigates through the various menu items.
The four menu items are:
SetUpRx
LockSet
Scan
CmdView
Rotate the MENU/SELECT control to highlight a menu
item, then push the control to access the top screen as-
sociated with that menu item.
Setup Menus
Selecting any item from the TopMenu goes directly to
that item’s setup screen. Selecting SetUpRx displays
the SetUpRx menu. Each item on the SetUpRx setup
menu accesses a different setup screen.
Selecting or accessing items from the SetUpRx menu
is identical to selecting items from the TopMenu--rotate
the MENU/SELECT control to highlight the desired
setup menu item, then push the control to access the
menu item.
Pressing the BACK button returns the user to the previ-
ous menu or screen. Pressing the BACK button from
the SetUpRx menu returns the user to whatever screen
was active prior to entering SetUpRx (either the Top-
Menu or a selected Receiver Detail Screen.)
Setup Screens
Individual setup screens are used to set the operating
parameters for each installed receiver module, including
audio levels, audio phase, battery status, compatibility
modes, noise reduction and diversity modes.
LCD Menus and Setup Screens (Descriptions and Functions)
Setup Screen
Title
Selected Receiver
Module
Special
Function
Display Area
Setup
Parameter
Receiver
Modules

VR Field Receiver
LECTROSONICS, INC.
14
An internally generated 1 kHz audio test tone can be
made available at the selected receiver’s XLR output.
This tone is used for precise level matching with other
equipment without actually going “on the air” and can
be very useful for diagnostic purposes. The tone is
toggled on or off by pressing the front panel Function
button. The Tone icon in the example below indicates
that the tone signal is turned off. The TONE box is filled
in (reveresed) when the tone signal is active.
Phase Setup Screen
The Phase setup screen controls the phase of the
audio output at the rear panel XLR jack relative to
the audio signal from the associated transmitter. Two
modes are available: NORMAL and INVERT. A receiver
set to Normal mode (default) will display a “+” in the
associated Receiver Module box. Rotating the MENU/
SELECT control to select INVERT changes the display
in the Receiver Module box to “-” and inverts the audio
output at the associated rear panel XLR jack.
TxBatt Setup Screen
The TxBatt setup screen allows the selection of the ex-
act battery type being used in the transmitter to provide
more accurate battery level monitoring. Four different
types of batteries are commonly used in Lectrosonics
transmitters: 9 Volt alkaline, 9 Volt lithium, AA alkaline,
and AA lithium. Rechargeable NiMH batteries can also
be used in the transmitters (see 9V TIM and AA TIM).
Correctly set, this feature will ensure that adequate
warning will be provided in advance of battery failure.
Depending on the TxBatt mode, a battery icon or timer
will be displayed on both the Overview and Receiver
Detail screens, and the battery level or timer value will
be displayed on the Receiver Infomation Screen. The
icon, timer or voltage only appears after a valid signal
has been detected for at least 10 seconds and when
both the transmitter and receiver module are operat-
ing in either 200 Series or Digital Hybrid (400 Series)
compatibility mode.
The TxBatt Setup Screen offers six monitoring choices:
9V ALK (9V) - For Lectrosonics Digital Hybrid (400
Series) and 200 Series transmitters using 9V alkaline
batteries. The voltage remaining in the battery is dis-
played as an icon on the Overview and Receiver Detail
screens and as the value on the TxBatt Setup Screen
for the selected receiver module. Receiver modules set
up for 9V alkaline batteries will have 9V displayed in the
corresponding Receiver Module box at the bottom of
the TxBatt setup screen.
Note: In 9V ALK, 9V LTH, AA ALK and AA LTH
modes, a blinking Battery icon indicates that the it
is close to exhaustion and needs replacing.
Selected Receiver
Audio Phase SelectReceiver Modules
Selected Receiver
Receiver
Modules
Monitoring Mode
Elapsed Time
Current
Transmitter
Battery Voltage
Selected Receiver Output Level
Tone On/Off
Indicator
(Shown with the
Tone Off.)
Receiver Modules
Receiver Detail Screen
Transmitter Battery Icon
Overview Screen

Modular Digital Hybrid Wireless™ Receiver
Rio Rancho, NM 15
9V LTH (9VL) - For Lectrosonics Digital Hybrid (400
Series) and 200 Series transmitters using 9V lithium
batteries. The voltage remaining in the battery is dis-
played as an icon on the Overview and Receiver Detail
screens and as the value on the TxBatt Setup Screen
for the selected Receiver Module. Receiver modules
set up for 9V lithium batteries will have “9VL” displayed
in the corresponding Receiver Module box at the bot-
tom of the TxBatt Setup Screen.
AA ALK (AA) - For Lectrosonics Digital Hybrid (400
Series) and 200 Series transmitters using AA alkaline
batteries. The voltage remaining in the battery is dis-
played as an icon on the Overview and Receiver Detail
screens and as the value on the TxBatt Setup Screen
for the selected Receiver Module. Receiver modules
set up for AA alkaline batteries will have “AA” displayed
in the corresponding Receiver Module box at the bot-
tom of the TxBatt Setup Screen.
AA LTH (AAL) - For Lectrosonics Digital Hybrid (400
Series) and 200 Series transmitters using AA lithium
batteries. The voltage remaining in the battery is dis-
played as an icon on the Overview and Receiver Detail
screens and as the value on the TxBatt Setup Screen
for the selected Receiver Module. Receiver modules
set up for AA lithium batteries will have “AAL” displayed
in the corresponding Receiver Module box at the bot-
tom of the TxBatt Setup Screen.
9V TIM (9VT) - This timer is compatible with any trans-
mitter using a 9V battery, with or without battery telem-
etry capabilities, or for rechargeable batteries where
voltage is constant over the life of the battery. The timer
monitors the accumulated time it receives RF from a
transmitter operating at the same frequency as the se-
lected receiver module. The elapsed time is displayed
in both the Overview and Receiver Detail screens, and
the TxBatt Setup Screen for the selected receiver mod-
ule. Its format is H:MM and it can run for up to 10 hours
(9:59) before rolling over.
The timer’s colon blinks (in both the Main Receiver
screen and the Receiver Detail Screen) when the timer
is active and receiving RF from the associated transmit-
ter. When the transmitter or VR is turned off, the timer
will retain the last time setting and resume counting
after the transmitter or receiver is powered up and a
signal is detected from the transmitter.
To reset (or zero) the timer, navigate to the TxBatt
Setup Screen, select the appropriate Receiver Module
using the front panel Receiver Select button, then press
the Function button to reset the timer to zero.
Receiver modules set up for 9V TIM will have “9VT”
displayed in the corresponding Receiver Module box at
the bottom of the TxBatt setup screen.
AA TIM (AAT) - Operates essentially the same as the
9V TIM timer except it applies to transmitters using AA
batteries. Receiver modules set up for AA TIM will have
“AAT” displayed in the corresponding Receiver Module
box at the bottom of the TxBatt setup screen.
Receiver Screen Detail
Transmitter Battery
Timer Icon
Colon Blinks
when Timer
is active and
receiving
RF from the
transmitter
Overview Screen
SmartNR Setup Screen
Available in Digital Hybrid (400 Series) Compatibility
Mode, the SmartNR (Smart Noise Reduction) Setup
Screen is used to select one of three noise reduction
modes:
Note: If any mode other than Digital Hybrid (400
Series) is selected, the SmartNR mode will
indicate “FIXED” and “N/A” will appear in the
corresponding Receiver Module box. SmartNR
is still applied in this mode; however, it is
automatically set to best emulate the original
analog receiver.
OFF - No noise reduction is performed and complete
transparency is preserved. All signals presented
to the transmitter’s analog front end, including any
faint microphone hiss, will be faithfully reproduced
at the receiver.

VR Field Receiver
LECTROSONICS, INC.
16
Pilot BP Shortcut
From the Overview Screen
it’s possible to set the Pi-
lotBP mode by holding the
front panel Function button
while pressing the appropri-
ate Receiver Select pushbut-
ton. This toggles the PilotBP
setting for the corresponding
receiver module, or, depend-
ing on the diversity mode
selected, receiver modules.
NORMAL (factory default) - Enough noise reduction
is applied to remove most of the hiss from the mic
preamp and some of the hiss from lavaliere micro-
phones. The noise reduction benefit is dramatic in
this position, yet the degree of transparency main-
tained is exceptional.
FULL - Enough noise reduction is applied to remove
most of the hiss from nearly any signal source of
reasonable quality, assuming levels are set properly
at the transmitter.
Rotate the MENU/SELECT control to display the
desired noise reduction mode. The selected mode will
be displayed in the Receiver Module box at the bottom
of the display. Press BACK to return to the previous
screen, or press a Receiver Select button to select a
different receiver module without leaving the SmartNR
Setup Screen.
PilotBP Setup Screen
PilotBP (pilot tone/squelch bypass) operates differently
depending on the compatibility mode. In the case of
100 Series, or Mode 3, PilotBP bypasses the squelch.
In 200 Series, IFB and Digital Hybrid (400 Series)
modes, PilotBP bypasses both the pilot tone detector
and the squelch. The VR always powers up with normal
squelch operation (pilot tone bypass mode disabled).
Caution: PilotBP was made available as a
diagnostic tool in the case that a receiver
does not appear to be working properly, or
to determine the nature of RF interference.
However, it should be used with caution. The
selected receiver can output very loud noises
in this mode.
To enable pilot tone
bypass mode for a
Receiver Module,
navigate to the Pi-
lotBP Setup Screen
and press the appro-
priate Receiver Select
button. Rotate the
MENU/SELECT con-
trol to select BYPASS.
BYP should appear in
the Receiver Module
box for the selected
receiver. Press the
BACK button return
to the previous menu,
or a Receiver Select button to select a different receiver
module.
To return the Receiver Module to normal PilotBP oper-
ating mode (pilot tone bypass mode disabled), access
the PilotBP Setup Screen, select the receiver module
and rotate the MENU/SELECT control to select NOR-
MAL.
Compat Setup Screen
The Compat setup screen is used to select the compat-
ibility mode for individual Receiver Modules, allowing
the VR to operate with a variety of transmitters. The
available compatibility modes are:
HYB This is the factory default setting and works
with all Lectrosonics Digital Hybrid Wireless™
(400 Series) transmitters. This mode offers
the best audio quality.
Mode 3 Works with certain non-Lectrosonics analog
transmitters. Contact the company for a list
of compatible transmitters.
Mode 6 Works with certain non-Lectrosonics analog
transmitters. Contact the company for a list
of compatible transmitters.
200 This mode works with all Lectrosonics 200
Series compatible transmitters.
100 This mode works with all Lectrosonics 100
Series compatible transmitters.
IFB IFB mode works will all Lectrosonics IFB
transmitters.
Selected Receiver
SmartNR Mode
Receiver Modules
Receiver
Modules
Compatibility Mode
Receiver
Modules
PilotBP Mode
Main
Receiver
Screen

Modular Digital Hybrid Wireless™ Receiver
Rio Rancho, NM 17
Tuning Setup Screen
The Tuning Setup Screen allows selection of one of four
factory set frequency groups (Groups A through D), two
user programmable frequency groups (Groups U and V)
or the choice to not use groups at all.
In the four factory set frequency groups, eight frequen-
cies per group are preselected. These frequencies are
chosen to be free of intermodulation products. (See
Frequency Coordination.)
In the two user programmable frequency groups, up to
16 frequencies can be programmed per group.
Note: The Tuning Setup Screen only selects the
tuning mode for the selected receiver module
(NORMAL or Group Tuning) and not the operating
frequency for that module. Actual operating
frequencies are chosen through the Receiver
Detail Screen. (See Adding/Deleting User Group
Frequencies.)
To set a receiver module’s tuning mode, access the
Tuning Setup Screen, press the appropriate front panel
Receiver Select button, rotate the MENU/SELECT
control to select either NORMAL mode, or one of the
group tuning modes. The tuning mode will be displayed
in the Receiver Module box at the bottom of the Tun-
ing Setup Screen. If NORMAL mode is selected, then
“NOR” will be displayed in the Receiver Module box. If
a tuning group is selected, then “G A” through “G V” will
be displayed in the Receiver Module boxes, depending
on the group selected.
Returning to the Overview Screen and pressing the
front panel Receiver Select button for the appropriate
receiver displays the Receiver Detail Screen for the
selected receiver. In the example, Tuning Group A was
selected for Receiver 1. The small “a” displayed next to
the Frequency Select Switch settings in the Receiver
Detail Screen indicates that this receiver module has
been set tuning Group A.
In NORMAL mode, only the Transmitter Frequency Se-
lect Switch settings would be displayed here.
When a receiver module is set to use a user program-
mable frequency group, the tuning behavior is modified
slightly. Turning the MENU/SELECT control navigates
among the frequencies that are “in” the currently
selected tuning group. Turning the MENU/SELECT
control while holding down the Function button allows
any frequency to be selected, whether or not it is in the
currently selected turning group.
Any time the currently tuned frequency is not in the cur-
rent tuning group, the Group Tuning Mode indicator on
the Receiver Detail Screen will blink. Any time the cur-
rently tuned frequency is in the current turning group,
the Group Tuning Mode indicator will give a steady
(non-blinking) indication.
User Programmable Frequency Group Behavior
The user programmable frequency groups work very
similar to the factory groups with a few exceptions. The
most obvious difference is the ability to add or remove
frequencies from the group. Less obvious is the behav-
ior of a user programmable frequency group with only
one, or no entries.
A user programmable frequency group with only one
entry will only display that one frequency regardless of
how much the MENU/SELECT control is turned (with-
out holding the Function button).
A user programmable frequency group with no entries
reverts to non-group-mode behavior, i.e., access is
allowed to all 256 available frequencies in the selected
receiver module’s frequency block. However, once a
frequency has been added to the tuning group, this
behavior changes to group-mode behavior where the
Function button must be pressed to access frequencies
that are not part of the current tuning group.
Adding/Deleting User Programmable
Frequency Group Entries
Note: Each User Programmable Frequency Group
has separate contents for each frequency block
covered by the VRM. However, each user group’s
contents are common to all receivers sharing the
same group tuning mode and frequency block.
1. Start from the Receiver Detail Screen of a receiver
module that is set to use Group “u” or Group “v” that
is also in the desired frequency range block. (See
Tuning Setup Screen.)
Receiver Module
Selected Receiver Tuning Mode
Receiver Detail Screen Group
Tuning
Mode

VR Field Receiver
LECTROSONICS, INC.
18
Note: To get to the Receiver Detail Screen for a
receiver module, press BACK until the Overview
screen appears, then select the receiver module
by pressing its Receiver Select button. If the
Group Tuning Mode indicator is blinking, then
currently tuned frequency is not in the group. If
the Group Tuning Mode indicator is steady, then
the current frequency is in the group. If the Group
Tuning Mode indicator is absent, or displays as “a”,
“b”, “c”, or “d”, then the receiver module is not set
to on of the User Programmable Tuning Modes.
2. Hold the Function Key and rotate the MENU/SE-
LECT control to any of the 256 frequencies in the
block. Whenever the selection comes to rest on a
frequency that is in the current group, the Group
Tuning Mode indicator (letter “u” or “v”) will give a
steady indication. On frequencies that are not in
the group, the indicator will blink.
3. To add or remove the displayed frequency from the
group, hold the Function button while pressing hte
MENU/SELECT control. The Group Tuning Mode
indicator will stop blinking to show that the frequen-
cy has been added to the group, or begin blinking to
indicate that the frequency has been removed from
the group.
DivMode Setup Screen
The VR Field System offers three different Diver-
sity modes of operation: SmartDiversity™(switched),
OptiBlend™(ratio diversity) and Frequency Diversity.
Regardless of which diversity mode is selected, re-
ceiver modules are always paired using the following
combinations: 1-2, 3-4 and 5-6. However, in switched
diversity operation, the individual receiver modules
operate independently with each module having its own
set of controls and indicators.
In ratio diversity and frequency diversity modes, the
paired receiver modules act as a set. Pressing the
Receiver Select button for one member of the pair has
the effect of selecting or operating on both receiver
modules in the pair.
Frequency diversity adds another facet in that it uses
two transmitters requiring the transmitter outputs to be
balanced in order for this mode to function correctly.
(The figure below shows Receiver Modules 5 and 6 set
for Frequency Diversity Mode.)
SmartDiversity™
The VRM is designed to route both antenna inputs to
each receiver module. SmartDiversity is a microproces-
sor controlled antenna phase switching process which
switches phase angle between the antenna inputs by 0
or 180 degrees depending on relative RF. The goal is to
minimize dropouts caused by multi-path reflections.
Since each receiver actually acts independently in this
mode, SmartDiversity allows diversity reception of up to
six independent channels.
OptiBlend™
OptiBlend™is a ratio diversity method which combines
the audio output from two adjacent receiver modules
(1-2, 3-4 or 5-6) relative to the RF signal input levels
at both receivers. The Overview Screen displays the
paired receivers with the relative RF input for each
receiver and a single (combined) audio output. While
two independent RF channels are displayed on the
Overview Screen, all other setup parameters are the
same for both receivers. From the Overview Screen,
pressing a Receiver Select button for either member of
the diversity pair displays the Receiver Detail Screen for
Receiver Module Pair
Antenna Phase AngleDiversity Mode
Diversity Mode
Receiver Module Pair
Combined Audio
Separate RF
Separate RF

Modular Digital Hybrid Wireless™ Receiver
Rio Rancho, NM 19
that pair. In this screen, the RF Signal Strength meter
is split with each side showing the RF signal strength of
one of the members of the diversity pair. (In the previ-
ous figure, the RF signal strength for Receiver Module
5 is the left half of the meter and the RF signal strength
for Receiver Mocule 6 is the right half.)
Frequency Diversity
Frequency Diversity mode uses two transmitters si-
multaneously carrying identical audio (the transmitter
microphones are placed right next to each other), and
the VR Field System performs a ratio blend of the audio
output from the associated receiver modules to protect
against dropouts. Another benefit of this mode is the
system avoids a transmitter that is signaling the end of
its battery life.
Frequency Diversity pairs two transmitters (of the same
make and model) with two adjacent receiver modules
(1-2, 3-4 or 5-6). Each transmitter/receiver in the pair
is tuned to a different frequency. The RF signal level at
each receiver is monitored and the audio is blended in a
manner similar to ratio diversity.
Select button for either member of the diversity pair
displays the Receiver Detail Screen for that pair. In this
screen, the RF Signal Strength meter is split with each
side showing the RF signal strength of one of the mem-
bers of the diversity pair. (In the previous figure, the
RF signal strength for Receiver Module 5 is the left half
of the meter and the RF signal strength for Receiver
Mocule 6 is the right half.)
In Frequency Diversity mode, the compatibility mode,
noise reduction, pilot tone bypass and output level are
all matched. For example, setting the compatibility
mode to Digital Hybrid in one receiver of the pair auto-
matically sets the other receiver to the same compatibil-
ity mode. However, transmitter battery monitoring and
operating frequency are set independently.
Frequency Diversity has two modes of operation: nor-
mal mode and test mode. Test mode is automatically
activated when the DivMode Setup Screen is active and
Frequency Diversity is selected. In this mode, the audio
is always blended exactly 50/50 allowing a true null to
be achieved when the INVT function is activated. When
exiting this setup screen, normal mode is activated and
the blending ratio depends on the RF signal strengths.
The INVT control is used during system setup to match
the audio from each transmitter/receiver module pair.
Pressing the front panel Function button inverts the
audio from the second half of the selected receiver pair.
This control can be used to balance transmitter audio
output levels and to allow transmitters having opposing
output audio phases to be used together in this mode.
Note: Each Receiver Module in the Frequency
Diversity pair must be tuned independently to
match the associated transmitter. This is done
by selecting the receiver using the front panel
Receiver Select Button to open its Receiver Detail
Screen, then rotating the MENU/SELECT control
to the desired frequency.
LockSet Setup Screen
The LockSet function is used to prevent inadvertent
changes to the VR Field System setup. LockSet is
accessed from the Top Menu. The MENU/SELECT
control is used to toggle between the “NOT LOCKED”
and “LOCKED” states.
Diversity
Mode
Receiver Module Pair
Combined Audio
Separate RF
INVT Contro
(Shown with INVT Off.)
Selected Receiver
Module from pair
highlighted
Separate RF

VR Field Receiver
LECTROSONICS, INC.
20
When the system is LOCKED, no settings or operat-
ing parameters may be changed from the LCD inter-
face. The system also will not enter Scan Mode. This
provides a measure of insurance against accidental
changes while still allowing all parameters to be viewed.
Attempts to change a parameter or enter Scan Mode
when the system is LOCKED results in the LOCKED!
screen message being displayed. The only exception is
the LockSet Setup Screen itself.
Scan Function
Warning: Do not enter the Scan Function
during normal operation. This is a setup
mode and not an operating mode. The
Scan Function automatically removes two
receiver modules from normal operation (one
from each frequency block) and uses them
to scan the frequency block ranges. (The
reciever modules used for scanning cannot
be changed by the user.) Entering the Scan
Function during normal operation may result
in unwanted audio interferrence, or accidental
retuning of the scanning receiver modules.
The VR Field System has an integrated scanning
function that displays a spectrum analysis as it scans
across the frequency block range. The purpose is to
find unused frequencies, or frequencies with minimal
RF interference. The Scan function has three modes:
Scan, Stop and Zoom. These modes are displayed on
the Scan screen and are accessed by pressing the front
panel Function button.
Note: The current Scan mode is displayed in the
upper left corner of the Scan screen. The mode
which will be selected by pressing the Function
button is highlighted and located under the current
Scan mode.
To use the integrated scanning function, from the Over-
view Screen push the MENU/SELECT control to enter
the Top Menu then rotate the control to highlight Scan.
Pressing the MENU/SELECT control again begins the
scanning function.
Scan Mode
The LCD switches to the Scan screen and automatically
starts progressively scanning all installed frequency
blocks. The unit will scan continually, accumulating the
highest peak seen on each channel with each sub-
sequent pass, until stopped by pressing the Function
button or the MENU/SELECT control. Data gathered
during the scanning process shows the “worst case
scenario” for any given channel and is retained until the
VRM is turned off or scanning is reset by momentarily
pressing the POWER On/Off switch.
In Scan mode, the highlighted Receiver Module boxes
are the receiver modules automatically selected for use
for spectrum analysis. The user cannot change this
selection. The lowest numbered receiver from each fre-
quency block is used. They are essentially “borrowed”
for the scanning function and are returned to their
original frequencies in Stop or Zoom modes, or when
Scan is exited.
In Scan mode, each vertical band of the display repre-
sents eight frequencies (800 kHz).
Warning: If one of the receiver modules is
manually tuned in Stop mode or Zoom mode,
the new frequency setting will persist when
exiting Scan. Moving the cursor for the
selected receiver module tunes that receiver in
real time.
Press Function
button to halt
scanning
Receiver Modules automatically
selected for scanning
Accumulated peaks
Currently Selected Receiver Module
Transmitter Frequency Select
Switch settings (Cursor Location)
Press Function
button to enter
Zoom mode
Press
Function
button to
resume
scanning
Current Scan
mode
Relative position of
6.6 MHz window in
frequency block
Currently Selected
Receiver Module