TB 9-6625-003-35
(3) Adjust test oscillator (A9) frequency for 1 kHz and amplitude for a mid-scale
indication on TI meter.
(4) Adjust test oscillator frequency for peak indication on TI meter while adjusting
GAIN control as necessary to maintain mid-scale indication. Frequency counter (A5) will
indicate between 980 and 1020 Hz.
(5) Adjust GAIN control until TI meter indicates 0 (zero) on 0 to 10 DB scale.
(6) Decrease test oscillator frequency until TI meter indicates 1.5 dB on 0 to 10 DB
(7) Increase test oscillator frequency until TI meter reaches peak and dips back to
1.5 dB. Record frequency counter indication. Difference between recorded indications will
be 40 Hz or less.
b. Adjustments. No adjustments can be made.
19. Range Accuracy
NOTE
a. Performance Check
(1) Adjust test oscillator (A9) amplitude to minimum and set TI VERNIER and
GAIN controls fully clockwise.
(2) Set INPUT SELECTOR switch to XTAL 200Ω.
(4) Set ratio transformer (A6) controls to .100000.
(5) Adjust test oscillator frequency for 1 kHz and amplitude for an on-scale
indication on TI meter.
(6) Adjust test oscillator frequency control for peak indication on TI meter and
adjust amplitude for a 0-dB indication on TI meter 0 to 10 DB scale.
(7) Set ratio transformer controls to .010000 and set TI RANGE switch to 10.
(8) Adjust ratio transformer controls for a 0-dB indication on TI meter.
Ratio
transformer will-indicate between .009772 and .010233.
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