TB 9-6625-003-35
26. Sensitivity, Stability, and Noise
a. Performance Check
Hz.
(3) Adjust TI GAIN control for on-scale indication on TI meter and adjust FREQ
control for peak indication.
(4) Adjust GAIN control for a 0-dB indication on TI meter.
(5) Adjust BANDWIDTH control clockwise until TI meter indicates 4.25 dB on 0 to
10 DB scale.
(6) Remove frequency counter from equipment setup.
(7) Adjust GAIN control fully clockwise
(8) Adjust test oscillator amplitude for 0-dB indication on TI meter. Test oscillator
output meter will indicate 0.1 V or less.
(9) Vary output of autotransformer from 105 to 115 V and back to 115 V while
maintaining 0-dB on TI meter with test oscillator amplitude control. Test oscillator output
will indicate 0.1 V or less.
(10) Adjust test oscillator amplitude for 0.1 V output while adjusting TI GAIN
control for 0-dB indication on TI meter.
(11) Disconnect test oscillator from TI and connect termination (B7) to TI INPUT.
(12) Set RANGE switch to 60. Average noise level as indicated on TI meter will be at
least 5 dB down from 0 on 0 to 10 DB scale.
(13) Set INPUT SELECTOR switch to XTAL 200KΩ.
(14) Disconnect termination from TI and connect TI INPUT to resistance standard
(A7), using cable (B4).
(15) Adjust resistance standard for 200 kilohms. TI meter will indicate same as in
(12) above.
b. Adjustments. No adjustments can be made.
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