Lectrosonics SRc-941 User manual

Quick
Start
Guide
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This guide is intended to assist with
initial setup and operation of your
Lectrosonics product.
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Camera Slot Dual UHF Receiver
Digital Hybrid Wireless®Technology
U.S. Patent 7,225,135
SRC-941
23 May 2018

LECTROSONICS, INC.2
Digital Hybrid Wireless®
The Lectrosonics Digital Hybrid Wireless®uses innovative technology to
combine the advantages of digital audio with the advantages of analog RF
transmission. The result delivers the superior sound quality of a digital system
and the excellent range of an analog system.
A proprietary algorithm encodes the digital audio information into an analog
format which can be transmitted in a robust manner over an analog FM wire-
less link. The receiver employs state-of-the-art filters, RF amplifiers, mixers
and detector to capture the encoded signal and a DSP 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 what a compandor can offer. Because the encoded
audio is sent in analog format, spectral and power efficiency and operating
range are not compromised.
Under weak RF conditions, the received signal degrades gracefully, like an
analog system, delivering as much usable audio as possible at maximum
range. Since the audio is free of compandor artifacts, pumping and breathing
problems are also greatly reduced.

www.lectrosonics.com 3
Quick Start Summary
The following checklist includes the minimum required settings to start using
the receiver.
• Install either a battery sled or camera slot adapter kit (see pages 5-6).
• Connect power to the receiver (see page 6-7).
• Set the DIVMODE for single or dual channel operation (see pages 8-9).
• Set the COMPAT (compatibility) mode for the transmitters to be used (see
pages 8-9).
• Find clear operating frequencies for one or both receivers (see page 10).
• Set transmitters on the matching frequencies (see transmitter manual).
• Verify transmitters are set to the same compatibility mode as the receiver
(see transmitter manual).
• Adjust transmitter input gain to match voice level and mic position (see
transmitter manual).
• Adjust receiver output level as needed for the camera or mixer input level
desired (see pages 8-9).
IMPORTANT:
FREQ.
WARNING
Performance will be degraded if
Receiver 2 is set 4.2 to 4.8 MHz higher
than Receiver 1. The LCD will also flash
this message periodically.

LECTROSONICS, INC.4
Audio Outputs
Audio outputs and the power inlet are located on the rear panel, accessed by
a variety of different adapters.
LCD Screen
A backlit, graphics-type LCD is used to set up and monitor the receiver. The
Main Window shown above is used during normal operation, to display RF
and audio levels, transmitter battery status, pilot tone status and diversity
activity for both receivers.
MENU/SEL Button
This button is used to select menu items and enter setup screens during
setup.
IR (Infrared) Sync
An IR Sync Port is used for quick setup with transmitters that offer this feature.
Settings for frequency, step size, compatibility mode and talk back are trans-
ferred from receiver to transmitter via the IR ports.
NOTE: Selected compatibility mode and talk back will only sync if they
are available options on the transmitter you are syncing with.
PWR/BACK Button
Press the PWR/BACK switch to turn the power on. Press and hold it until the
display goes blank to turn power off. It also functions as a “back” button while
navigating the various menus and setup screens to return to the previous
screen or menu item.
The firmware “remembers” whether the receiver was turned on or off after
power is disconnected, and it returns to that state when power is restored.
This allows the receiver to power up and down as the camera or external sup-
ply is turned on and off.
Press the PWR/BACK button from the Main Window to briefly display the
external power voltage.
Front Panel Controls and Functions
DOWN
Button
MENU/SELECT
Button
POWER/
BACK
Button
UP Button
Receiver 1 Receiver 2
IR Sync Port

www.lectrosonics.com 5
UP/DOWN Arrow Buttons
The UP and DOWN arrow buttons are used to select various options and
adjust values in the setup screens, and provide secondary functions such as
locking out the panel to guard against accidental changes.
Installing Rear Panel Adapters
Installation of the rear panel output/power adapters is the same for all models.
Panels are held in
place by two Phillips
head screws on the
sides of the housing.
Connections
between the panel
and main circuit
board are made via
miniature mating
connectors.
Align the mating
connectors and slide
the panel straight
into the housing until
the screw holes align
with the housing.

LECTROSONICS, INC.6
Battery Adapters
Battery sled adapters configure the receiver for standalone use or to provide
battery backup power. Several options are available:
• SRBATTSLEDTOP
• SRBATTSLEDBOTTOM
• SR9VBP (inserts into the SLED adapters)
SRBATTSLEDTOP
SRBATTSLEDBOTTOM
The battery sled adapters accept L and M type video camera rechargeable
batteries and the optional SR9VBP 9 volt battery case.
L or M type video
camera batteries
mount directly onto
the battery sled
SR9VBP
battery
case for
two 9 volt
batteries
The battery sled adapters do not include charging circuitry. Batteries must
be charged with their respective chargers. The adapters include an integral
circuit that automatically selects between the battery and the external source,
whichever delivers the highest voltage.

www.lectrosonics.com 7
External Power Supply
DCR15/4AU
Power supply with a standard C14 inlet and
locking LZR coaxial output connector; 100-240
VAC in, 15 VDC regulated output; 4A max.
Main Window (LCD)
RF Levels Audio Level
Transmitter
Battery Level
Pilot Tone
Indicator
Receiver 1 Receiver 2 Diversity
Activity
The Main Window displays information concerning the condition of the Pilot
Tone, antenna phase, RF and audio signal levels and battery conditions for
both the receiver and the associated transmitter.
NOTE: When the RATIO DIVERSITY mode is selected, both receivers
are combined to pick up the same transmitter, so the Main Window will
display a single audio channel.
Receiver 1
RF Level
Receiver 2
RF Level
Audio
Level
Transmitter
Battery Level
Pilot Tone
Indicator
Pressing the MENU/SEL button accesses the menus and screens for setting
up the receiver and searching for clear frequency channels.

LECTROSONICS, INC.8
Navigating the LCD
Note: Press the BACK button from the Main Window to briefly display
the external power supply voltage.
SETUP
(item)
101
941.600
27A
953.700
MENU
BACK
BACK
MENU
Receiver 1
Pilot Tone
ON\OFF
Hold MENU and
hold DOWN for
1 sec. or more
Hold MENU
and hold UP
for 1 sec. or
more
Mute Audio on
Receiver 1
Mute Audio on
Receiver 2
Press
UP/DOWN
to select
MENU
BACK
Setup Screen
Main Window
Receiver 1
Receiver 2
Press UP/DOWN to change frequency
Press UP/DOWN to change frequency
When DIVMODE is set to RATIO the frequency screen will look like this.
Receiver 2
Pilot Tone
ON/OFF
Hold MENU and
press UP
momentarily
Hold MENU and
press DOWN
momentarily
941
:
941
:
Press
UP/DOWN
to adjust
RECEIVER 1
00 00 00
RECEIVER 2
SEL
BACK
SEL
SEL
LEVEL LEVEL
00
BACK
LEVEL
SETUP
UP
R
941
: 01
941.600
Ratio Mode Block Freq hex code
Freq MHz
SEL
BACK
DEFAULT
SETUP
Ratio
Switched
RESET– –
DEFAULT Press
DOWN to
continue SURE?
ARE YOUPress
MENU/SEL
to reset
DOWN
SEL
BACK
SMARTUNE
SETUP
UP
DOWN
SEL
BACK
IR SYNC
SETUP
UP
SEL
BACK SEL
SCANNING
STOPS
Press
SEL to
select
receiver
Press
UP/DOWN
to scroll
frequency
Press both
UP and
DOWN to
ZOOM
Press
UP/DOWN to
scroll
frequency
DOWN
25
BACK BACK
SCAN
SETUP
UP
DIVMOD
RATIO
Press
UP/DOWN
to select
DOWN
SEL
BACK
DIVMODE
SETUP
UP
DOWN
SEL
BACK
TALKBACK
SETUP
UP
SEL
BACK
COMPAT
RECEIVER 1
Press
UP/DOWN
to select
receiver
COMPAT
SETUP
DOWN
SEL
BACK
RECEIVER 1 RECEIVER 2
TUNING
u
NOR
Press
SEL to
select
receiver
DOWN
UP
DOWN
SEL
BACK
STEPSIZE
SETUP
UP
DOWN
SEL
BACK
RECEIVER 1 RECEIVER 2
SmtNR
FUL
NOR
Press
SEL to
select
receiver
SmtNR
N/A
OFF
SmtNR
SETUP
UP
DOWN
PHASE
SETUP SEL
BACK
PHASE PHASE
RECEIVER 1 RECEIVER 2
Press
UP/DOWN
to select
Press
SEL to
select
receiver
++
UP
TXBAT
SETUP SEL
BACK
TXBAT TXBAT
RECEIVER 1
Press
UP/DOWN
to select
Press
SEL to
select
receiver
9V AA AA
9V
DOWN
TONE
SETUP SEL
BACK
TONE?
RECEIVER 1 RECEIVER 2
Press
UP/DOWN
to select
Press
SEL to
select
receiver
00+05
Tone will be enabled when level is set with the UP/DOWN buttons
TONE?
00+05
LVL 1K
RECEIVER 1
00+05
BACK
TUNING
SETUP
TUNE
SMART 1
BAND
TX 1
B1
Press
UP/DOWN
to select
band
Press
MENU/SEL
to start
scanning SYNC
OK
1Press
DOWN to IR
sync TX 1
Press
MENU/SEL
to continue
Follow
prompts to
scan and set
up TX 2
SYNC 1
2
Press UP to sync TX 1 Press DOWN to sync TX 2
TALKBACK
OFF
Press
UP/DOWN
to select
12
NU HYBR
Press
MENU/SEL
to highlight
mode
COMPAT
RECEIVER 2
IFB SER
Press
UP/DOWN
to select
mode
Press
UP/DOWN
to select
mode
STEPSIZE
100 25
Press
MENU/SEL
to highlight
receiver
Press
UP/DOWN
to select
step size
Press
UP/DOWN
to select
mode
MIXMODE
SETUP SEL
BACK
MIXMODE Press
UP/DOWN
to select
MIXBOTH
DOWN
UP
UP
STEPSIZE
100 25
TUNING
v
NOR
DOWN
DOWN
UP
DOWN
UP
MIXTRIM
SETUP
SEL
BACK
MIXTRIM
00
MIXTRIM
00 +05
Press
UP/DOWN
to select
value
00
Press
SEL to
select
receiver
8A
941
8A
941
SCANNING
BEGINS
8A
941

www.lectrosonics.com 9
SETUP
(item)
101
941.600
27A
953.700
MENU
BACK
BACK
MENU
Receiver 1
Pilot Tone
ON\OFF
Hold MENU and
hold DOWN for
1 sec. or more
Hold MENU
and hold UP
for 1 sec. or
more
Mute Audio on
Receiver 1
Mute Audio on
Receiver 2
Press
UP/DOWN
to select
MENU
BACK
Setup Screen
Main Window
Receiver 1
Receiver 2
Press UP/DOWN to change frequency
Press UP/DOWN to change frequency
When DIVMODE is set to RATIO the frequency screen will look like this.
Receiver 2
Pilot Tone
ON/OFF
Hold MENU and
press UP
momentarily
Hold MENU and
press DOWN
momentarily
941
:
941
:
Press
UP/DOWN
to adjust
RECEIVER 1
00 00 00
RECEIVER 2
SEL
BACK
SEL
SEL
LEVEL LEVEL
00
BACK
LEVEL
SETUP
UP
R
941
: 01
941.600
Ratio Mode Block Freq hex code
Freq MHz
SEL
BACK
DEFAULT
SETUP
Ratio
Switched
RESET– –
DEFAULT Press
DOWN to
continue SURE?
ARE YOUPress
MENU/SEL
to reset
DOWN
SEL
BACK
SMARTUNE
SETUP
UP
DOWN
SEL
BACK
IR SYNC
SETUP
UP
SEL
BACK SEL
SCANNING
STOPS
Press
SEL to
select
receiver
Press
UP/DOWN
to scroll
frequency
Press both
UP and
DOWN to
ZOOM
Press
UP/DOWN to
scroll
frequency
DOWN
25
BACK BACK
SCAN
SETUP
UP
DIVMOD
RATIO
Press
UP/DOWN
to select
DOWN
SEL
BACK
DIVMODE
SETUP
UP
DOWN
SEL
BACK
TALKBACK
SETUP
UP
SEL
BACK
COMPAT
RECEIVER 1
Press
UP/DOWN
to select
receiver
COMPAT
SETUP
DOWN
SEL
BACK
RECEIVER 1 RECEIVER 2
TUNING
u
NOR
Press
SEL to
select
receiver
DOWN
UP
DOWN
SEL
BACK
STEPSIZE
SETUP
UP
DOWN
SEL
BACK
RECEIVER 1 RECEIVER 2
SmtNR
FUL
NOR
Press
SEL to
select
receiver
SmtNR
N/A
OFF
SmtNR
SETUP
UP
DOWN
PHASE
SETUP SEL
BACK
PHASE PHASE
RECEIVER 1 RECEIVER 2
Press
UP/DOWN
to select
Press
SEL to
select
receiver
++
UP
TXBAT
SETUP SEL
BACK
TXBAT TXBAT
RECEIVER 1
Press
UP/DOWN
to select
Press
SEL to
select
receiver
9V AA AA
9V
DOWN
TONE
SETUP SEL
BACK
TONE?
RECEIVER 1 RECEIVER 2
Press
UP/DOWN
to select
Press
SEL to
select
receiver
00+05
Tone will be enabled when level is set with the UP/DOWN buttons
TONE?
00+05
LVL 1K
RECEIVER 1
00+05
BACK
TUNING
SETUP
TUNE
SMART 1
BAND
TX 1
B1
Press
UP/DOWN
to select
band
Press
MENU/SEL
to start
scanning SYNC
OK
1Press
DOWN to IR
sync TX 1
Press
MENU/SEL
to continue
Follow
prompts to
scan and set
up TX 2
SYNC 1
2
Press UP to sync TX 1 Press DOWN to sync TX 2
TALKBACK
OFF
Press
UP/DOWN
to select
12
NU HYBR
Press
MENU/SEL
to highlight
mode
COMPAT
RECEIVER 2
IFB SER
Press
UP/DOWN
to select
mode
Press
UP/DOWN
to select
mode
STEPSIZE
100 25
Press
MENU/SEL
to highlight
receiver
Press
UP/DOWN
to select
step size
Press
UP/DOWN
to select
mode
MIXMODE
SETUP SEL
BACK
MIXMODE Press
UP/DOWN
to select
MIXBOTH
DOWN
UP
UP
STEPSIZE
100 25
TUNING
v
NOR
DOWN
DOWN
UP
DOWN
UP
MIXTRIM
SETUP
SEL
BACK
MIXTRIM
00
MIXTRIM
00 +05
Press
UP/DOWN
to select
value
00
Press
SEL to
select
receiver
8A
941
8A
941
SCANNING
BEGINS
8A
941

LECTROSONICS, INC.10
Scanning for Clear Frequencies
Scan Window Zoom View Window
Press both UP and DOWN
arrows on control panel to
switch to the Zoom View
Press the BACK
button to return
to the Scan View
Window
941
B2
Block
Dashed line (cursor)
shows the currently
selected receiver
RF activity
level
Previously tuned
frequency Freq
in hex
Cursor (center bar)
Freq in
hex
8E
941
Block
First, turn off all of the transmitters you intend to use with the receiver.
Navigate to the SETUP/SCAN screen and press the MENU/SEL button to
start the scanner. The display will switch to the Scan Window (see illustration
above) and start scanning immediately. Allow the receiver to scan across the
entire tuning range at least once, then press the MENU/SEL button to stop
the scanning.
Scroll through the screen with the UP and DOWN buttons and find a frequen-
cy where no (or very weak) RF signals are present. Press the PWR/BACK
button to set the receiver to this new frequency.
Press both the UP and DOWN buttons at the same time to switch to the
Zoom View Window (see illustration above). In this view, the cursor remains
fixed in the center of the screen and the background scrolls behind it. The
frequency can be stepped up and down in 100 kHz increments using the UP
and DOWN arrow buttons.
When the receiver is configured for SWITCHED diversity (dual channel
mode), two cursors will appear when the scanning is stopped. Press MENU/
SEL to toggle between the two receivers. The cursor for the selected receiver
will be a dashed rather than solid line. Select each receiver and use the UP
and DOWN buttons to locate a frequency with no (or very weak) RF activity.
Keep the frequencies of the two receivers at least 700 kHz apart to minimize
de-sensing (short range) issues. This spacing is a “worst case” approximation
assuming the transmitters are about 25 feet from the receiver antennas.
Data gathered during a scan is stored until it is intentionally erased or the
power is turned off. Previous data will remain and subsequent scans can be
made to search for additional signals or to accumulate higher peaks.
To clear the scan memory and screens, press the back button several times to
return to the Main Window, then press and hold the PWR/BACK button briefly.
As soon as Powering off... appears on the display, release the button. The
receiver will remain turned on, and the scan data will be erased.
Set your transmitter to the same frequency as shown on the receiver display,
turn the transmitter on and verify that a strong RF signal is present.

www.lectrosonics.com 11
Mounting and Orientation
A variety of accessories are available to enable various mounting options. For
maximum operating range, the antennas should be vertical and above the
camera and other equipment. The AMJ Rev. A antenna is jointed so the whips
can be oriented vertically regardless of the orientation of the receiver.
Maximum sensitivity is perpendicular to the whip, so an ideal setup is shown
in Fig. 1 and Fig. 2 where the receiver is mounted in either a vertical or hori-
zontal position with the whips oriented vertically.
Fig. 3 depicts the receiver and antenna whips oriented horizontally, which
places the null of the receiver antenna pattern pointing toward the transmitter.
The result, of course, is a weak signal entering the receiver.
Fig. 4 depicts the worst setup where the nulls in both receiver and transmitter
patterns face one another.
The transmitter antenna whips can point upward as shown in these dia-
grams, but they will work just as well with the whip pointing downward. Mount
the transmitter so that the whip is vertical and not in direct contact with the
wearer’s body or metallic objects in clothing and costuming.
Tx
STRONG
SIGNAL
WEAK
SIGNAL
Rx
Rx
Tx
WEAKEST
SIGNAL
Rx
Tx
Tx
STRONG
SIGNAL
Rx
Fig. 1
Fig. 2
Fig. 3
Fig. 4

LIMITED ONE YEAR WARRANTY
The equipment is warranted for one year from date of purchase against defects in
materials or workmanship provided it was purchased from an authorized dealer. This
warranty does not cover equipment which has been abused or damaged by careless
handling or shipping. This warranty does not apply to used or demonstrator equipment.
Should any defect develop, Lectrosonics, Inc. will, at our option, repair or replace any
defective parts without charge for either parts or labor. If Lectrosonics, Inc. cannot
correct the defect in your equipment, it will be replaced at no charge with a similar new
item. Lectrosonics, Inc. will pay for the cost of returning your equipment to you.
This warranty applies only to items returned to Lectrosonics, Inc. or an authorized
dealer, shipping costs prepaid, within one year from the date of purchase.
This Limited Warranty is governed by the laws of the State of New Mexico. It states the
entire liablility of Lectrosonics Inc. and the entire remedy of the purchaser for any
breach of warranty as outlined above. NEITHER LECTROSONICS, INC. NOR
ANYONE INVOLVED IN THE PRODUCTION OR DELIVERY OF THE EQUIPMENT
SHALL BE LIABLE FOR ANY INDIRECT, SPECIAL, PUNITIVE, CONSEQUENTIAL,
OR INCIDENTAL DAMAGES ARISING OUT OF THE USE OR INABILITY TO USE
THIS EQUIPMENT EVEN IF LECTROSONICS, INC. HAS BEEN ADVISED OF THE
POSSIBILITY OF SUCH DAMAGES. IN NO EVENT SHALL THE LIABILITY OF
LECTROSONICS, INC. EXCEED THE PURCHASE PRICE OF ANY DEFECTIVE
EQUIPMENT.
This warranty gives you specific legal rights. You may have additional legal rights which
vary from state to state.