TB 9-6625-003-35
(3) Set ratio transformer (A6) controls to .100000.
(4) Adjust test oscillator (A9) frequency for peak indication on TI meter and
amplitude for a 0-dB indication on TI meter.
(5) Set ratio transformer controls to .010000 and set SWR-DB switch to 10.
(6) Adjust ratio transformer controls until TI meter indicates 0 dB. Ratio
transformer will indicate between .009772 and .010233.
(7) Repeat technique of (5) and (6) above for TI switch settings and indications
listed in table 4. Ratio transformer will indicate within limits specified.
Table 4. Range Accuracy
Ratio transformer
Initial ratio
Test instrument SWR DB
indications
transformer settings
switch settings
Min
Max
.001000
20
.000955
.0010471
.010000
30
.009550
.010471
.001000
40
.000955
.0010471
.010000
50
.009550
.010471
.001000
60
.000955
.001047
1Before
proceeding to next step, perform (a) through (d) below:
(a)
Turn TI GAIN control one quarter turn from full counterclockwise position.
(b)
Record ratio transformer indication and reduce signal generator amplitude to minimum.
(b)
Multiply ratio transformer indication recorded in (b) above by 100 and adjust ratio transformer controls to indicate the
product.
(d)
Increase signal generator amplitude and adjust frequency for peak indication on TI meter. Adjust amplitude for 0 decibel
an TI.
b. Adjustments. No adjustments can be made.
12. Power Supply
NOTE
Do not perform power supply check if all other parameters are
within tolerance.
chassis ground, using probe (B6). If dc voltmeter does not indicate between 232.8 and
247.8 V dc, perform b below.
10