AMP VR75 Series User manual

VR75/OM Rev
-
A
Operation Manual
VR75 Series
UHF, L, S, C-Band
Video / Audio Receivers
Designed and Manufactured By
7025 Longley Lane, Suite 20
Reno, NV 89511
Distributed By
107 Woodbine Down Blvd, Units 7&8
Toronto, ON M9W 6Y1

VR75/OM Rev-A
TABLE OF CONTENTS
1.0 Introduction......................................................................................................... 1
1.1 Purpose and Function............................................................................... 1
1.2 Capabilities .............................................................................................. 1
1.3 Specifications........................................................................................... 2
1.4 Mechanical Drawing and Connector Pin-Outs.......................................... 4
1.5 List of Items Furnished ............................................................................ 5
1.6 List of Items Required.............................................................................. 5
1.7 Environmental Requirements ................................................................... 5
2.0 Safety Precautions ............................................................................................... 5
3.0 Preparation for Use.............................................................................................. 5
3.1 Unpacking................................................................................................ 6
3.2 Pre-Test ................................................................................................... 6
4.0 Installation and Operating Instructions................................................................. 6
4.1 Use and Function of Connectors............................................................... 6
4.2 Use and Function of Switches .................................................................. 7
4.2.1 Frequency Selection Switches .................................................................. 7
4.2.2 Video Inversion Switch............................................................................ 7
4.3 Audio Output(s) ....................................................................................... 8
4.4 Signal Strength Meter .............................................................................. 8
4.5 Initial Adjustments and Settings............................................................... 8
4.6 Shut Down............................................................................................... 8
5.0 Maintenance Instructions..................................................................................... 8
5.1 Cleaning .................................................................................................. 8
5.2 Troubleshooting....................................................................................... 9
5.3 Preparation for Reshipment...................................................................... 9
5.4 Returning an Item .................................................................................... 9
Warranty Statement....................................................................................................... 10

VR75/OM Rev-A 1
1.0 INTRODUCTION
Thank you for choosing this AMP Wireless Video Product. Every effort has been made
to design and manufacture a quality product that will meet your surveillance needs for
many years. Please visit our website (www.advmw.com/video) for information on other
video products and for downloadable datasheets, operation manuals, and frequency
selection charts.
If you have any questions regarding this product or if you require technical assistance,
please feel free to contact us at the telephone numbers below:
Dyplex Communications Advanced Microwave Products
[phone] [phone]
1.1 Purpose and Function
VR75 Series Video/Audio Receivers are developed and manufactured by Advanced
Microwave Products (AMP) and distributed by Dyplex Communications (Dyplex).
Receivers are designed for color or monochrome video and audio surveillance. Receivers
are best operated with AMP’s VT15, VT30, and VT50 Series Transmitters but are
compatible with most other video transmitters on the market.
1.2 Capabilities
AMP Receivers are designed for harsh environments and feature robust packaging and
connectors. Compact package sizes provide versatility in unit placement and system
applications.
AMP Receivers require no tuning or adjustments. All units operate directly with any
standard video monitor. Power requirements are +9 to +16 Vdc and can be derived from
batteries, simple power supplies, or vehicle power.
Whip or “rubber duck” antennas are adequate for many receiver applications. A variety
of standard and high performance antennas are available through Dyplex.
AMP Transmitters and Receivers are standard equipped with video inversion, selectable
via a slide switch, for a basic level of security.
VR75 Series Receivers are standard equipped for video-only reception. Up to two audio
subcarriers may be specified for applications requiring audio reception.
VR75 Series Receivers are available with many options allowing customization to
specific applications. Most common options include frequency selection (full band
selection), dual L/S-band selection, PAL video, and up to two audio subcarriers.
If our standard products and options do not satisfy your requirements, please contact us.
Our experienced design team welcomes your custom specifications.

VR75/OM Rev-A 2
1.3 Specifications
RF Characteristics
Frequency Range (Specify): UHF 340.00 - 399.90 MHz 100 kHz Channels
(Other Ranges Available) L-Band 1710.00 – 1850.00 MHz 250 kHz Channels
S-Band 2450.00 - 2483.50 MHz 250 kHz Channels
Dual 1.7-1.85 GHz & 2.2-2.5 GHz 250 kHz Channels
C-Band 4400.00 – 4999.75 MHz 250 kHz Channels
Frequency Selection (Specify): Fixed or Channelized, Full Band, Slide Switch Selectable
Maximum RF Input: +10 dBm Without Damage
Input Impedance: 50 _ Nominal, VSWR 1.5:1 Maximum
Noise Figure: UHF/L-Band 4.5 dB Maximum
S-Band 2.5 dB Maximum
Dual 4.8 dB Maximum
C-Band 3.5 dB Maximum
Image Rejection: UHF/L/S/Dual 60 dB Minimum
C-Band 50 dB Minimum
Signal Strength Output: 0.3 Vdc @ -90 dBm to 5.0 Vdc @ -20 dBm, Monotonic
LO/IF Characteristics
LO Stability: ±0.002% Over -20°C to +50°C
IF Frequency: UHF/S-Band 140 MHz
L/Dual/C-Band 480 MHz
IF Bandwidth: 18 MHz
Harmonic and Spurious Level: -50 dB Maximum
Video Characteristics
Modulation Type: Analog FM
Modulation Sense: Standard (Positive) or Inverted (Negative), Slide Switch Selectable
Frequency Response (Specify): 10 Hz to 3.5 MHz (Monochrome), 4.5 MHz (NTSC), or 5.5 MHz
(PAL), ±1.5 dB
Pre-Emphasis (Specify): 525-Line (NTSC), 625-Line (PAL), or None
Output Level: 1 Vpk-pk / ±4 MHz @ Crossover Frequency, into 75 _ Load
Output Impedance: 75 _ Nominal, Unbalanced
Audio Characteristics
Subcarriers (Specify): None, One, or Two
Subcarrier Frequency (Specify): 4.83, 5.8, 6.0, 6.2, 6.5, 6.8, 7.2, 7.5, 8.3, 8.5, or 8.59 MHz, or Custom
Subcarrier Separation (Two): 700 kHz Minimum
Modulation Type: Analog FM, Positive Sense
Frequency Response (Specify): 20 Hz to 10 kHz (Audio) or 20 Hz to 100 kHz (Data), ±1.5 dB
De-Emphasis (Specify): 75 sec (NTSC) or 50 sec (PAL)
Output Level: -10 dBV (Line Level) / 100 kHz pk-pk @ 1 kHz Rate, into 600 _ Load
Output Impedance: 600 _ Nominal, Unbalanced

VR75/OM Rev-A 3
Power Requirements
Input Voltage: +9 to +16 Vdc, Reverse Polarity Protected
Current Draw: UHF/L/S/Dual-Band 275 mA Maximum
C-Band 300 mA Maximum
Mechanical
Material: CNC Machined T6061-T6 Nickel Plated Aluminum
Dimensions: 2.50” W x 3.50” L x 0.85” H
Weight: 6 oz. Maximum
Connectors: RF Input: SMA Female
Video Output: BNC Female
Audio Output: 3.5mm Stereo Jack (If Applicable)
DC Supply, Audio, RSS: RM12BRB-6PH Hirose Circular
Environmental
Temperature (Operating): -20°C to +50°C
Humidity: Up to 95% @ Any Temperature Forming Frost or Condensation

VR75/OM Rev-A 4
1.4 Mechanical Drawing and Connector Pin-Outs

VR75/OM Rev-A 5
1.5 List of Items Furnished
1-Receiver
1-Type RM12BPE-6S Hirose (Socket) I/O Cable
1.6 List of Items Required
Antenna, Type SMA Plug (Male) Connector
Monitor, Type BNC Jack (Female) Connector
Type BNC Plug (Male) to BNC Plug (Male) Video Cable
Video connector adapter to BNC, if monitor does not have BNC connector
Speaker or Headphones (if applicable)
3.5mm Stereo Plug to Dual Mono Adapter (if monitoring dual audio w/ headphones)
1.7 Environmental Requirements
AMP Receivers are designed for indoor or outdoor use. Precautions should be taken
when exposing receivers to the elements. Do not expose to 100% humidity.
Receivers should be located in areas where the ambient temperature does not exceed the
maximum operating temperature indicated in the specifications (Section 1.4). Placement
in confined locations with minimal air flow, in direct sunlight in areas of temperature
extremes, or in proximity to other devices which generate heat, such as power supplies,
heating systems, etc., should be avoided. Temperatures exceeding +75°C may cause
permanent damage to the equipment.
When not used for extended periods of time external connections, including I/O cable,
video cable, and antenna, should be removed and the units covered, boxed, or crated and
stored in a clean, dry place. See Section 1.7 above for environmental requirements.
2.0 SAFETY PRECAUTIONS
Receivers should be handled with caution like any electrical or electronic device. Do not
handle the units or associated cabling with wet hands or materials.
Connections should be made only to previously-tested, active power sources (outlets or
batteries) of the correct voltage, and each connector should be inserted only into its
designated port. All connections should be checked to ensure they are firmly in place.
3.0 PREPARATION FOR USE
3.1 Unpacking
Carefully remove the receiver from the shipping container and make sure all listed
furnished items are included (Section 1.5). Inspect all items for damage. If any item is
omitted from the shipment or appears damaged, contact Dyplex or AMP with detailed
description of problem.

VR75/OM Rev-A 6
3.2 Pre-Test
Although each unit is thoroughly tested at the factory for both functional and
environmental performance, a minimal amount of pre-testing should be done by the
operator before placing the receiver into service. The receiver, an appropriate AMP
transmitter, transmit and receive antennas, a video camera, a video monitor, and DC
power supplies are the only components required to perform a functional test of the
receiver. If testing audio, a microphone and a speaker or headphones will also be
required.
The transmit and receive antennas should be situated at a distance of greater than 25 feet
apart to prevent serious damage to or destruction of the receiver’s front end. Set up the
transmitter and make all necessary adjustments in accordance with that unit’s Operation
Manual. Connect the video camera to the transmitter video input and, if testing audio,
connect the microphone to the transmitter audio input.
Verify DC power supplies are between +9 and +16 Vdc. With the I/O Cable
(RM12BPE-6S circular connector) DISCONNECTED from the receiver, connect DC
power supply to I/O Cable (red = positive DC input, black = negative DC input
(ground)). Do not connect I/O Cable to receiver until all other connections are complete.
Connect the receive antenna to receiver RF input connector (SMA). Connect the Video
Cable between the receiver video output connector (BNC) and the video monitor. If
testing audio, connect the speaker to the I/O Cable or headphones to the 3.5mm Audio
Jack. Refer to Section 4.1 for I/O Cable wiring.
Configure switches as instructed in Section 4.2. Connect I/O Cable to receiver (mates to
RM12BRB-6PH circular connector on receiver). Video should be observed on the
monitor and audio heard through the speaker / headphones (if applicable).
If no video or audio (if applicable) is present, refer to Section 5.2 for troubleshooting
instructions.
4.0 INSTALLATION AND OPERATING INSTRUCTIONS
4.1 Use and Function of Connectors
AMP Receivers are simple to install, requiring only connection to the antenna, monitor,
speaker or headphones (if applicable), and DC power supply using the appropriate cables
and jacks. The use and function of the receiver connectors are as follows:

VR75/OM Rev-A 7
I/O CONNECTOR (RM12BRB-6PH)
Mate: Supplied RM12BPE-6S I/O Cable
Red Wire – Positive DC Input (+9 to +16 Vdc)
Black Wire – Negative DC Input (Ground)
Brown Wire – Ground (for speakers)
White Wire – Received Signal Strength Out
Yellow Wire – Audio 1 Output (if applicable)
Violet Wire – Audio 2 Output (if applicable)
AUDIO CONNECTOR (3.5mm Jack)
Installed only when subcarrier(s) specified
Mates: One subcarrier – 3.5mm Mono Plug
Two subcarriers – 3.5mm Stereo Plug or
Stereo Plug to Dual Mono Jack Adapter
Mono Prong – Audio 1 Output (if applicable)
Stereo Prong – Audio 2 Output (if applicable)
Ground – Ground / Shield
VIDEO CONNECTOR (BNC)
Mate: Supplied Video Cable
Standard 75 Ohm Video Output
Outputs Standard 1 Vpk-pk Video Signal
RF INPUT CONNECTOR (SMA)
Mate: Appropriately Selected SMA Antenna
Standard 50 Ohm RF Input
4.2 Use and Function of Switches
4.2.1 Frequency Selection Switches:
Frequency selectability is an option on all VR75 Series Receivers providing RF
frequency control with rocker switches accessible on the side of the chassis. S-Band
units utilize 8 rocker switches; UHF, L-Band, and C-Band units utilize 12 rocker
switches. Each switch is uniquely identified (FS1 through FS8, or FS1 through FS12) on
the unit label.
To program the desired RF frequency, position the individual switches as shown in the
applicable Frequency Selection Chart, included with product shipment and available as a
download on the applicable Video Product Page of our website
(www.advmw.com/video).
4.2.2 Video Inversion Switch:
All AMP Transmitters and Receivers are standard equipped with video inversion,
selectable with a slide switch. When selected, the phase of the video signal is inverted
(shifted 180o) in the transmitter and re-inverted in the receiver, providing a basic level of
security. If an inverted video signal is detected by a receiver not configured for
inversion, the resulting picture is scrambled.
To select standard video (no inversion), position the slide switch to VIDEO STD as
indicated on the unit label. To select inverted video (phase inversion), position the slide
switch to VIDEO INV as indicated on the unit label.
The video inversion switch position on AMP’s Receivers must match that of the
transmitter or the picture will appear scrambled. If using AMP’s Receivers with other
receivers or vice-versa, position the Video Inversion slide switch to VIDEO STD.

VR75/OM Rev-A 8
4.3 Audio Output(s):
VR75 Receivers, when equipped for subcarriers, offer dual buffered audio outputs for
each subcarrier. Up to two subcarriers may be specified.
When one subcarrier is specified, the audio output signal is available on pin 5 (yellow
wire) of the I/O Connector and the mono prong of the 3.5mm Jack. The outputs are
buffered providing one audio output for monitoring (3.5mm Jack) and one for recording
(I/O connector). Both outputs are 600 Ohms, unbalanced, at line level (-10 dBV).
When two subcarriers are specified, the audio output signals are available on pins 5
(audio 1, yellow wire) and 6 (audio 2, violet wire) of the I/O Connector and the mono
(audio 1) and stereo (audio 2) prongs of the 3.5mm Jack. A 3.5mm Stereo Plug to Dual
Mono Jack Adapter may be used to separate the audio signals into two 3.5mm mono
ports. All four audio outputs are buffered providing simultaneous monitoring and
recording of all outputs. All outputs are 600 Ohms, unbalanced, at line level (-10 dBV).
4.4 Signal Strength Meter:
VR75 Receivers are standard equipped with a Signal Strength Meter mounted to the
chassis. Received signal strength is indicated by a bar apparent on the meter when the
receiver is powered. This meter is intended to roughly indicate received signal strength
and reads similar to an analog fuel gauge. That is, when the bar is towards the left, signal
strength is low (far left -90 dBm). When the bar is towards the right, signal strength is
high (far right -20 dBm).
If the meter exhibits a display full of flashing bars, signal strength is excessive and
damage to the receiver front end may occur. Do not rely on flashing bars to indicate
levels that may cause receiver damage. Damage may occur at lower levels, thereby
preventing flashing bars from occurring.
4.5 Initial Adjustments and Settings
There are no initial adjustments or settings necessary to use AMP Receivers other than
proper configuration of the switches as outlined above in Section 4.2. To assure optimum
performance, the user should be familiar with the camera, monitor, microphone, and
speaker/headphones used with this video/audio system.
4.6 Shut Down
If the receiver is to be shut down only briefly, simply remove DC voltage from the I/O
Cable or disconnect I/O Cable from receiver. If the unit is to be shut down for an
extended period, all external cabling including the antenna should be removed and the
unit should be stored in a container and placed in a clean, dry environment.
5.0 MAINTENANCE INSTRUCTIONS
5.1 Cleaning
AMP Receivers should be periodically wiped off with a clean, damp cloth. For more
thorough cleaning, dampen a clean cloth with glass cleaner and wipe off unit. Ensure
units are completely disconnected from their power sources before cleaning.