TB 9-6625-2289-24
NOTE
Operate calibrator in wideband operation.
(13) Connect TI probe to calibrator WIDEBAND OUTPUT.
(14) Adjust calibrator voltage controls for 3.0 V ac output at 50 kHz.
(15) Adjust METER CAL R49 (fig. 1) for a TI indication between 2.7 and 3.3 V ac
(ideal 3.0 V ac) (R).
(16) Set RANGE switch to .001 VOLTS.
(17) Disconnect RF probe from calibrator.
(18) Zero TI meter with ZERO control.
NOTE
If necessary, repeat 7 g through i above.
(19) Connect probe to calibrator WIDEBAND OUTPUT.
(20) Adjust calibrator for 1 mV ac output and then adjust R3 (fig. 1) for a TI
indication between .00085 and .001 15 V ac (ideal .001 V ac) (R).
(21) Set RANGE switch to .003 VOLTS.
(22) Disconnect RF probe from calibrator.
(23) Zero TI meter with ZERO control.
Figure 1. AN/URM-145C.
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