FLEXCOMM
II
C-5000 (Non-Digital)
Installation Manual
150-1355-000 Rev. M
CONFIDENTIAL AND PROPRIETARY TO COBHAM
Page 151
8. Final System Check-out
A. Reconnect the coax cable connecting the radio to the antenna.
B. Place an AT-150 or similar broad band antenna 10 feet from the aircraft antenna. The antenna should
be at the same elevation and have the same polarity as the antenna on the aircraft.
C. Connect the antenna to the Service Monitor set to receiver at the desired frequency of test.
D. Transmit over the FLEXCOMM II radio on the test frequency and measure the received signal power.
E. The insertion loss should be between –30 and –40dB @ 150 MHz. Substitution of the receiving
antenna or changes in antenna placement can significantly affect measurement results.
F. Record the actual values measured and the measurement setup. Use this information to track any
degradation in the antenna system on future system checkouts.