TB 9-6625-1978-35
a. Performance Check
(1) Disconnect external time base input, if applicable, from rear panel 10 MHz jack
of TI, and set TIME BASE INT-EXT switch to INT.
(2) Connect time/frequency workstation OUTPUT 1 MHz to frequency difference
meter REF INPUT.
(3) Connect TI TIME BASE 10 MHz (rear panel) to frequency difference meter
SIG INPUT.
(4) Adjust TCX0 (fig. 1) for frequency difference meter indication of less than 1 part
in 109.
(5) Disconnect frequency difference meter from TI.
(6) Replace external time base input if removed in (1) above and set TIME BASE
INT-EXT switch to EXT.
b. Adjustments. No further adjustments can be made.
14. Band I Input
Sensitivity
a. Performance Check
(1) Position controls as listed in (a) through (c) below:
(a) SAMPLE RATE control fully ccw.
(b) BAND SELECT switch to 20 Hz - 135 MHz.
(c) RESOLUTION pushbuttons as necessary.
(2) Connect function generator Function Outputs Unbalanced to TI 20 Hz - 135
MHz 1 MEG input using a 50Ω feedthrough termination.
(3) Set function generator for a sinewave, 20 Hz, 71 mVp-p, 50Ω output. TI will
display a stable count of applied frequency.
(4) Adjust function generator frequency from 20 Hz to 10 MHz. TI will display a
stable count of applied frequency.
(5) Disconnect function generator and 50Ω feedthrough termination from TI.
(6) Connect signal generator RF Output to TI 20 Hz - 135 MHz 1 MEG input
using a 50Ω feedthrough termination.
display a stable count of applied frequency.
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