TB 11-6625-2974-30
(5) Set A5Al-R14 and A5A1-R15 to midrange.
(6) Set STE PRIME POWER AC and DC switches
(6) Adjust A5Al-R16 to obtain a reading of -00.on
to ON.
METER.
(7) Observe oscilloscope. The display should be
(7) Remove jumper wire from EXTERNAL INPUT
+3.
0.2 Vdc, with no voltage spikes
jacks.
present. If there are spikes on the signal, the
(8) Using DVM, adjust external power supply output
synthesizer may be faulty and cannot be
for + 30. 0.05 V.
calibrated (refer to TM 11-6625-2974-13 for
(9) Connect the power supply outputs to
maintenance instructions).
EXTERNAL INPUT red (+) and gray (-) jacks.
(10) Adjust A5A1-R14 to obtain a reading of + 30.on
Connect DVM to pin 3 (+) and pin
1 (-)of
METER.
extender card.
(11) Disconnect external power supply and connect
(9) Observe and record reading on DVM.
jumper wire between EXTERNAL INPUT jacks.
(10) Connect DVM to A5A3-U4, pin 6 (+) (fig.4-8).
(12) Repeat steps (6) through (11) until the
(11) Observe DVM. Reading should be 0.4 + 0.V
performance standards in steps (6) and (10) are
higher than the reading in step (9).
If
the
met without further adjustment.
performance standard is met, perform step
(12).If not, go to subparagraph
4-5.
b (below) for adjustment.
a.
BITE Module Performance Check.
(12) Set STE PRIME POWER AC and DC switches
(1) Set STE PRIME POWER AC and DC switches
to OFF.
to OFF.
(13) Remove extender card and reinstall BITE
(2) Remove BITE module A5A3 (fig.4-5) from card
module in card cage.
cage, and install on extender card (P/O
b. BITE Module Adjustment.
accessory kit).
(1) Adjust A5A3-R13 (fig. 4-8) to obtain a reading
(3) Set front panel RF switch (fig.4-1) to ON.
on DVM of 0. 0.1 V higher than the reading
(4) Set FREQ CONTROL MHz switches to 9250
recorded in step (9) (sub para. a, above).
(2) Set STE PRIME POWER AC and DC switches
card.
to OFF.
(3) Remove extender card and reinstall BITE
module in card cage.
4-10