TB 9-4920-456-24
(2) Remove adapter signal divider from TI case and adjust dip switches (located at
top of right side of adapter-signal divider) for an indication between -64.5 and -65.5 dBm on
measuring receiver.
NOTE
After each TI DIP switch setting, it will be necessary to reset
the TI by pressing ATTEN BOT, 7, 5, 0, and ENTER keys, in
that sequence, before the measuring receiver will display a new
dBm indication.
14. Reply Path Insertion Loss Test
a. Performance Check
(1) Disconnect 50 Ω coaxial cable at TI RF and connect measuring receiver sensor
module to end of the cable.
(2) On TI CODE/ATTEN SELECT keyboard, press ATTEN BOT key.
(3) Enter 990 using the CODE/ATTEN SELECT numeric keys and press ENTER
key. TI display will indicate 99.0 dBM*.
(4) Set TI NORMAL, REPLY PWR/FREQ switch to down position.
(6) On signal generator turn RF OUTPUT on.
(7) Set up measuring receiver for Tuned RF Level.
(8) On measuring receiver select RATIO function.
(9) On signal generator turn RF OUTPUT off.
(10) Disconnect 50 Ω coaxial cable at measuring receiver sensor module and connect
end of cable to TI BOT ANT.
(11) Connect measuring receiver sensor module to TI RF.
(12) On signal generator turn RF OUTPUT on.
(13) If measuring receiver does not indicate between -18.0 and -21.0 dB, and within
0.5 dB of value (BOT 137) recorded on calibration label (located near REPLY ATTEN
switch), perform b (1) through (7) below.