TB 9-6625-003-35
(9) Repeat technique of (7) and (8) above for settings and indications listed in table
Table 5 . Range Linearity
Ratio transformer
Initial ratio
Test instrument RANGE
indications
transformer settings
SWR DB 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.
(c) 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 meter.
b. Adjustments. No adjustments can be made.
20. Meter Linearity and Expanded Range
a. Performance Check
(1) Set RANGE switch to 10 and ratio transformer (A6) controls to .100000.
(2) Adjust test oscillator (A9) amplitude for an on-scale indication on TI meter and
fine-tune for peak indication.
(3) Adjust test oscillator amplitude and TI GAIN controls for a 0-dB indication on TI
meter 0 to 10 DB scale.
(4) Adjust ratio transformer controls until TI meter indicates 1 on 0 to 10 DB scale.
Ratio transformer will indicate between .077625 and .081283.
(5) Repeat technique of (4) above for settings and indications listed in table 6. Ratio
transformer will indicate within limits specified.
Table 6. Range Linearity
Ratio transformer
Test instrument
indications
(0 to 10 dB scale)
Min
Max
2
.061666
.064565
3
.048978
.051286
4
.038905
.040738
5
.030903
.032359
16
