TB 9-6625-2334-24
(3) Set signal generator for each frequency in table 11 and slowly increase signal
generator amplitude until TI indication is stable at applied frequency. If adjusted signal
generator amplitude exceeds limits specified, perform b below.
Signal generator
Adjusted signal
output
generator amplitude
(MHz)
(mV)
90
< 20
300
< 20
600
< 20
900
< 20
1300
< 20
b. Adjustments
(1) Set TI RESOLUTION, N switch to .1kHz.
(3) Set signal generator for a 1299 MHz, 100 mV output. Slowly decrease signal
generator amplitude while adjusting A8A1 (fig. 1) R22 for maximum sensitivity (at least 20 mV)
and a stable indication at approximately 1299 MHz (R).
(4) Set signal generator for a 90 MHz, 100 mV output. Slowly decrease signal
generator amplitude until TI displays erroneous indications above 100 MHz (Example:
101.nnnnn).
(5) Adjust A8R12 (fig. 1) until TI stops gating (R).
(6) Set signal generator for a 90 MHz, 125 mV output.
(7) Connect multimeter INPUT HI to A8A1 (fig. 1) pin 1 and LO to ground.
indication
switches
from
approximately 12 to 15 V dc to 10 V dc (R).
12. Digital Voltmeter (Option 021)
a. Performance Check
(1) Position controls as listed in (a) through (e) below:
FUNCTION switch to DVM.
(a)
FREQ RESOLUTION, N switch to 1Hz.
(b)
DCV RANGE switch to AUTO.
(c)
FILTER switch to OFF.
(d)
READ A and READ B pushbuttons out.
(e)
(2) Short TI HI and LO. If TI display does not indicate between -0.0004 V and
+0.0004 V, perform b (1) below.
(3) Disconnect short from TI HI and LO.
(4) Connect calibrator OUTPUT HI and LO to TI HI and LO.