TB 9-4920-456-24
16. VSWR
a. Performance Check
(1) On measuring receiver deselect RATIO function.
NOTE
Ensure signal generator RF OUTPUT is off.
(2) Connect measuring receiver sensor module to signal generator RF OUTPUT.
(3) Set signal generator output for 1090 MHz.
(4) On signal generator turn RF OUTPUT on.
(5) Setup measuring receiver for TUNED LEVEL POWER. Set signal generator to
0.0 dBm.
(6) On signal generator turn RF OUTPUT off.
(7) Disconnect
measuring
receiver
sensor
module
from
signal
generator
RF OUTPUT.
(8) Connect VSWR bridge RF INPUT to signal generator RF OUTPUT.
(9) Connect short to VSWR bridge device under test.
(10) Connect measuring receiver sensor module to SWR bridge REFLECTED
RF OUTPUT.
(11) On signal generator turn RF OUTPUT on.
(12) On measuring receiver select RATIO function.
(13) Disconnect short from VSWR bridge and record indication on measuring receiver
to include the positive or negative sign.
(14) Connect mismatch unit (4049398) to VSWR bridge and record indication on
measuring receiver.
(15) If value recorded in step (13) above is a negative number, see example in
paragraph (a) below. If value recorded in step (13) above is a positive number, see example
in paragraph (b) below.