FlightHawk RF Test Set
A-2
but may also harm the transmitter if the reflection is excessive. The
recommended FDR is an easy to use handheld tester, with a Go/No-Go
function by use of a limit line and simple distance to fault measurement.
It can be used to quickly identify improper connections, defective cables
and faulty antennas easily from the Equipment rack, eliminating
disassembly of the airplane to test the RF system.
(4) Refer to the Instruction or Operation Manual of the frequency
domain reflectometer for specific instructions on set-up and tests for the
coaxial cable and antenna system.
(a) To do a health check of the entire coaxial cable and antenna system,
you must remove the black box from the EE rack and connect the tester
directly to the rack’s bench plug coax receptacle. There is no need to
make any other disconnections unless the health check fails. The check
will give a simple Go/No-Go indication of the health of the entire cable
and antenna system. In the case of a No-Go indication, any faults may be
isolated via the FDR’s “distance to fault” function. Use the “distance to
fault” readout and applicable system wire diagram to help isolate the
failure to a specified connector, cable segment or antenna.
(b) The FDR facilitates both simple Go/No-Go testing, as well as in depth
testing. Use the Instruction or Operation Manual for specific instructions
to:
1) DATA SAVE: Stores parameters and able to upload from a USB or via
Bluetooth. User can recall settings and immediately test. For example:
User selects “SATCOM High Gain Transmit VSWR” and then plugs into
bench connector and reads display.
2) CALIBRATION: Use the OSL Calibration Combo (Open, Short, 50 ohm
Load 50 ohm) to calibrate prior to use.
3) VSWR and RETURN LOSS (RL) TESTING: Displays the readings in
Return loss or VSWR, the user simply selects the display they desire.
