FLEXCOMM 2000
(P-2000/C-2000/RT-2000)
Installation Manual
Page 54 of 56 Publication No. 150-049106
P-2000 Installation Manual Rev. F
Nov 2007
B. Receiver Verification
(1) Select a channel with known RX and TX frequencies on FM1.
(2) Set the Service Monitor to TX at the frequency programmed on the test unit with a 1 kHz
tone with 3 kHz deviation for FM mode. If necessary, refer to the user’s manual supplied
with the Service Monitor.
(3) Connect the output of the radio to the RF input port with a cable less than three feet in
length. Set the output power of the Service Monitor to the specified sensitivity level of the
radio under test.
(4) With the proper cables, route the headset audio back into the Service Monitor. Push the
FM1 Volume button to open the squelch and measure SINAD. SINAD should be better
than 12 dB for FM.
(5) Increase the RF signal by 10 dB and verify that the squelch gate opens.
(6) Repeat for FM2 if available.
C. Final System Check-out
(1) Reconnect the coax cable connecting the radio to the antenna.
(2) 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.
(3) Connect the antenna to the Service Monitor set to RX at the desired frequency of test.
(4) TX over FM1 on the test frequency and measure the received signal power.
(5) The insertion loss should be between –30 and –40 dB. Substitution of the receiving antenna
or changes in antenna placement can significantly effect measurement results.
(6) Record the actual values measured and the measurement setup. Use this information to
track any degradation in the antenna system on future system checkouts.
(7) Repeat for FM2.
These commodities, technology or software are controlled in accordance with the United States Export Administration Regulations, Export Classification
Control Number (ECCN) 7E994. When exporting, diversion contrary to U.S. law is prohibited.
To Next Page
Loading...
