User's Manual

P-2000/C-2000/RT-2000
INSTALLATION MANUAL
Publication No. 150-049106 Page 39 of 41
Rev. A P-2000 Installation Manual
Oct 2003
SECTION 5 – Continued Airworthiness Instructions
Introduction
This document contains instructions for testing a FLEXCOMM 200 system on a periodic
maintenance cycle to assure continuous airworthiness. This document is intended to
supplement the individual installation and user manuals of the Flexcomm 2000 system
components. The aircraft maintenance personnel should be in possession of and refer to
these manuals during inspections. The Flexcomm 2000 system includes a P-2000 panel
mount transceiver or a C-2000 control head and a RT-2000 remote mount transceiver and
suitable antennas. The recommended maintenance cycle is one year.
Equipment
To perform the checkout procedures described below, you must have the following:
• A HP 8920 Communications Service Monitor or equivalent to transmit and receive
over the programmed frequencies.
• An AT-150 or equivalent broad band antenna or single band antennas covering
the same frequencies of the unit under test.
• Miscellaneous cables and adapters.
• A handset interfaced to the FLEXCOMM 2000 system.
• Four wire Ohmmeter.
NOTE: Calibration or internal LRU adjustments are only required on failure condition of the
equipment under test.
Antenna Verification
The bonding of all antennas and the radio chassis to the airframe should be verified to
have an impedance of less than 0.1 Ohm. The VSWR of the combined antenna and coax
cable should be measured at the connector to the radio. The VSWR should be no more
than the maximum specified antenna 2.5:1.
Transmitter Verification
1. Select a channel with known Receive and Transmit frequencies on FM1.
2. Set the Service Monitor to receive the transmit frequency of the selected channel.
Connect the output of the radio under test to the Service Monitor RF input port with
a cable less than three feet in length (refer to the Service Monitor User’s Manual).
3. Use the handset interfaced to the FLEXCOMM 2000 system to transmit a signal,
modulated from the Service Monitor.