User's Manual

C-5000 COMMUNICATION MANAGEMENT CONTROLLER
INSTALLATION MANUAL
3.
Transmitter Tests
A. General
During transmitter verification tests, monitor any other radios or sensors that are present to
determine if interference between them and the C-5000 system exists.
(1) Input a 1 kHz sinewave tone into the primary microphone port and adjust input level
for .25 VRMS. DO NOT RELY ON THE TEST EQUIPMENT SETTING - MEASURE
USING AN AC VOLTMETER AT THE MICROPHONE JACK.
(2) Set the communication analyzer to FM mode. Tune the manual channel on the
C-5000 to the frequencies listed in Tables 1.0 through 1.5 (select appropriate
transceiver model) and record transmit power and modulation levels at the output of
the radio. This will verify the C-5000 is communicating with the transceiver and that
microphone audio is getting to the transceiver at the proper level. Verify that the
C-5000 indicates a transmit condition by showing the transmit indicator when the
PTT is initiated. If modulation is not 3000 Hz +/ 500 Hz, adjust audio panel for
more/less output. Also verify transmit frequency is correct.
(3) Remove the audio source and transmit on a selected frequency; verify that sidetone
audio is heard in the headset.
(4) Connect the through line Watt meter between the radio and antenna and check
forward and reflected power at each of the frequencies listed in the tables below that
is appropriate for the type of transceiver being tested. The Reflected power should
be less than 30% of the forward power.
(5) Perform Tests 7 - 9 on transceiver #2. Use the secondary mic/headset port for audio
input/output.
B. Receiver Verification
(1) Use the communication analyzer to measure receiver sensitivity at the frequencies
listed in tables 1.14-1.18 (Select the table based on appropriate transceiver model).
Remember that frequencies below 400 MHz use the RT-5000 "N" RF connector and
frequencies above 400 MHz use the "TNC" RF connector. Use the manual channel
on the C-5000 to tune the transceiver. Verify RT #1 by varying the input signal until
12 dB sinad is measured. The signal level should be < .6μV for all FM Channels.
THE INSTALLER MAY BE REQUIRED TO PRESS THE "TEST" BUTTON TO
GET AUDIO OUT OF THE RADIO.
(2) Perform the same tests on transceiver #2 if available.
(3) With the Antennas connected to their corresponding radios, transmit with the
Communications analyzer to all receivers in each radio using an antenna that is
located 10-20 feet away from each C-5000 system antenna. Verify that the signal is
received with good audio quality, the squelch light operates properly for each
receiver.
Page 7-4 Publication No. 150-041118
Section 7 – System Checkout Rev C
May 2006