TB 9-6625-003-35
(c) GAIN and VERNIER controls one-quarter turn from fully counterclockwise
position.
(2) Set ratio transformer (A6) controls to .100000.
(3) Adjust test oscillator (A9) amplitude for an on-scale indication on TI meter and
fine-tune frequency control for peak indication.
(4) Readjust test oscillator amplitude and TI GAIN control for a 0-dB indication on
TI meter 0 to 2.5 DB scale. Adjust ratio transformer for TI indication of 2.5 dB on 0 to 2.5
DB scale. If ratio transformer does not indicate between .055975 and .056494, perform b
below.
(5) Adjust ratio transformer control for TI indications listed in table 8. Ratio
transformer will indicate within limits specified.
Table 8. Expanded Range Linearity
Ratio transformer
Test instrument indications
indications
(0 to 2.5 DB scale)
Min
Max
2
.062806
.063388
1.5
.070470
.071122
1
.079068
.079800
.5
.088716
.089537
(6) Repeat (2) through (4) above.
(7) Set ratio transformer controls to .056234 and set TI EXPAND switch to 2.50.
(8) Adjust ratio transformer controls for a 0-dB indication TI meter on 0 to 2.5 DB
scale. Ratio transformer will indicate between .054954 and .057544.
(9) Repeat technique of (7) and (8) above for settings and indications listed in table
Table 9. Expanded Range Accuracy
Test instrument
Ratio transformer
Initial ratio
EXPAND
indications
transformer settings
switch positions
Min
Max
.031623
5.0
.030903
.032359
.017783
7.5
.017378
.018197
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