User’s Manual
The most important thing we build is trust.
XR Series Receiver
Cobham Surveillance
GMS Products
1916 Palomar Oaks Way Ste 100
Carlsbad, CA 92008
100-M0037X2 04/15/2010 T: 760-496-0055
F: 760-496-0057
www.cobham.com/gms
Table of Contents
1. Introduction .................................................................................................................................................................................. 4
2. Functional Description ........................................................................................................................................................... 4
2.1 Power................................................................................................................................................................................................ 4
2.3 Audio ................................................................................................................................................................................................ 4
2.4 Video ................................................................................................................................................................................................ 4
2.5 Serial Port Interface .................................................................................................................................................................. 4
3. Specifications for XR Series Frequency Agile Receivers ................................................................................ 5
3.1 RF ....................................................................................................................................................................................................... 5
3.2 Power................................................................................................................................................................................................ 5
3.3 Video ................................................................................................................................................................................................ 5
3.4 Environment ................................................................................................................................................................................. 5
3.5 Audio ................................................................................................................................................................................................ 5
3.6 Mechanical .................................................................................................................................................................................... 5
List of Appendix
Appendix A: Cable Assembly ...................................................................................................................................................... 6
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Revision History
Version Date Main Changes from Previous version Created by
X1 04/25/05 Initial Release TM
X2 02/24/10 Change doc format RM
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1. Introduction
The XR Series of receivers from GMS, are advanced technology microwave receivers capable
of operation at 1.7 – 6.0 GHz. The XR Series demodulates one video and two audio signals
from a composite analog RF source. The XR Series is fully synthesized and operated at 16
pre-programmed channels. The Channel Select is controlled by a microprocessor and a 16
position rotary switch sets the desired channel. The XR includes an LED display for
representation of power and signal strength to facilitate path alignment.
The XR Series features a Pre-select Band Pass Filter and integral Low Noise Amplifier at the RF
input with a nominal noise figure of 5 dB. The XR employs dual SAW filters at the IF stage for
enhanced adjacent channel interference rejection. Two buffered video output signals and
two balanced audio outputs are provided at a dB 15 connector. NTSC and PAL standards are
available. Small size, lower power consumption and serial port control make the XR series
ideal for use in remote applications.
2. Functional Description
2.1 Power
Power requirements are +11 to +15 VDC at 250-350 mA. Connection to the receiver is
made through the DB-15 connector .
2.2 RF
The XR Series Receivers have a nominal sensitivity of -78 dBm for a 36 dB S/N
(weighted) with a dynamic range of 75 dB and a 5 dB overall noise figure. The RF signal
is supplied to the receiver through the SMA connector (J4).
2.3 Audio
The XR Series Receivers have two audio channels. Each channel provides a balanced
audio level of +9dBm (maximum) into 600 ohms. Both audio channels are output
through the DB-15 connector. Audio gain of each output is independently adjustable
via internal pots.
2.4 Video
XR Series Receivers have one video channel. The video has two buffered outputs. Each output is 1
Vpp into 75 ohms. Video level of both outputs is simultaneously adjustable via an internal pot.
Video is accessible through the DB-15 connector .
2.5 Serial Port Interface
TTL level synchronous serial interface is provided as an option on all XR Series Receives. Access to
this interface is provided through the DB-15 connector.
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3. Specifications for XR Series Frequency Agile Receivers
3.1 RF
Frequency Range 1.7 – 6.0 GHz standard
(Consult factory for additional
frequencies)
Frequency Stability 0.005%
Noise Figure 5 dB typical
Dynamic Range 75 dB
Sensitivity -80 dBm
Input Impedance 50 Ώ
3.2 Power
Voltage 11 to 15 VDC
Current 400 mA typical
3.3 Video
Output Impedance 75 Ώ
Output Level 1 volt (peak to peak)
De-emphasis Per CCIR 525/625 line
Frequency Response 10 Hz – 10 MHz with video LPF
(Meets or exceeds EIA/TIA 250-C end to
end performance specifications)
3.4 Environment
Temperature Range -20° to +70°
Humidity 0 to100% non-condensing
3.5 Audio
Sub-carriers Available 4.83, 5.8, 6.0, 6.2, 6.5, 6.8, 7.02, 7.5, 8.3,
8.5, .59 MHz (any two)
Output Impedance 600 Ώ balanced
Output Level +9 dBm
3.6 Mechanical
Size 3.25” X 4.25” X 0.75” (10.4 cu. in>)
Weight 8 oz/227 g
RF Input Connector J2, SMA
A/V/Power Connector J1, DB-15
Pinout: 1: ±11 to 15 VDC 8: Audio GND
2: Audio 2 Low 9: Video out 1
3: Audio 2 High 10: Video out 2
4: Audio 1 Low 11: Digital clock
5: Audio 1 High 12: Video out 3
6: Analog GND 13: Digital I/O
7: Signal Strength 14: Video GND
15: Comp Video Out
(Meets or exceeds EIA/TIA 250-C end to
end performance specifications)
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Appendix A - Cable Assembly
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