FLEXCOMM
II
C-5000 (Non-Digital)
Installation Manual
150-1355-000 Rev. M
CONFIDENTIAL AND PROPRIETARY TO COBHAM
Page 137
D. Checkout Procedure (Continued)
3.A.(2) (Continued)
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 1 - 4 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 6-7 thru 6-12 (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 < .6
V 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 and the squelch light operates properly for each receiver.
C. Encryption Verification
If an external encryption system is being used, select a channel that accesses the encryption unit,
and test RX/TX encryption capability. Remember to load encryption keys into the unit first. Use a
handheld or communication analyzer equipped with your encryption type to communicate with the C-
5000 transceivers under test
