Specifications

Passport® is a registered trademark of Trident Micro Systems. LTR® is a registered trademark of EF Johnson Corporation. Windows® is a registered trademark of
Microsoft Corporation.
General
CS-540U CS-540V
Number of Channels: 16
Operating Voltage:
11 V DC Min / 13.8 V DC Nominal /15 V DC Max
Channel Spacing: 5kHz/6.25KHz/Splinter
Current Drain: 10A Max
Duty Cycle w/o Duplexer: Transmit: 100 % duty @ 33W output
Weight: 18.5 lbs.
Weight w/ Duplexer: 19.5 lbs.
Frequency Range: * 450-480 MHz 148-174 MHz
Dimensions (W x H x D): 19.0” x 3.5” x 14.0”
Frequency Stability: +/-1.0 ppm
Operating Temperature
Range:
-22° F to +140° F (-30° C to +60° C)
Receiver
Local Oscillator: Low-side injection High-side injection
Sensitivity (12dB SINAD): < 0.25 µV @ 12.5 kHz < 0.25 µV @25.0 kHz
Squelch Threshold: Open 12dB SINAD/ Close 8dB SINAD
Selectivity: 62dB @ 12.5kHz 72dB @ 25.0kHz
Spurious Rejection: 75dB
Intermodulation Rejection: 72dB @ 12.5kHz 72dB @ 25.0kHz
Antenna Connector: N-Type
Antenna Impedance: 50Ω
RF Output (w/o duplexer):
Programmable
450-470 @ 0-40W
471-480 @ 0-35W
148-174 @ 0-40W
Modulation: 160K0F3E, 11K0F3E
Maximum Deviation: +/- 5kHz (25 kHz) +/- 2.5 kHz (12.5 kHz)
FM Hum and Noise: 36dB @ 12.5kHz 42dB @ 25.0kHz
Antenna Connector: N-Type
Antenna Impedance: 50Ω
Transmitter
+/- 2.5 ppm
* Commercial frequency range listed, however both VHF and UHF versions operate in their respective amateur
region of the spectrum.
Specifications per EIA Standards. In our on-going commitment to quality, specifications are subject to change
Feature-Rich Carrier Operated
Switch (COS): Dedicate one out-
put pin of the accessory connector
to become a COS output. Select
the COS to toggle based on either
carrier or valid signaling. Polarity
of the output pin can be either ac-
tive high or active low. Also,
COS can be dedicated to operate
for only one user!
100% LTR® Compatible and
Lo-Speed Data Ready:
Compatible with your favorite
LTR® trunking contoller. The
CS-540 provides DC-coupling
from the receiver to the controller
and from the controller all the way
to the RF transmitter. No sub-
audible signal degradation.
Transmitter-data ready in 24 ms
after external PTT is engaged.
Windows® Based Programmer:
The CS-540 is setup and pro-
grammed using the PGM-540 pro-
gramming software. No expen-
sive programming box or cable re-
quired! Uses an off-the-shelf DB9
male-female for the programming
cable. (Cable included with pro-
gramming software package.)
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