BITE Module A5A3 Calibration

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.

(8) Disconnect oscilloscope from extender card.

(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).

the

met without further adjustment.

performance standard is met, perform step

(12).If not, go to subparagraph

4-5.

BITE Module A5A3 Calibration

b (below) for adjustment.

BITE Module Performance Check.

(12) Set STE PRIME POWER AC and DC switches

(1) Set STE PRIME POWER AC and DC switches

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).

(5) Connect oscilloscope probe to pin 3 of extender

(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