TB 9-6625-2043-35
(4) Adjust ZERO control to an average zero indication (downscale) on TI meter
(minus sign flashes on and off). True rms voltmeter will indicate 100 mV or less.
(5) Set FULL SCALE switch to -30 dBm. If TI meter (model 42B) does not indicate
zero (downscale), perform b below. For model 42BD, if multimeter does not indicate 0.0 V dc,
perform b below.
b. Adjustments.
Adjust R233 (fig. 1 or 2)
for a
zero indication (downscale) on TI
meter (R). For model 42BD, adjust R233 (fig. 2) for 0.0 V dc indication on multimeter (R).
a. Performance Check
(2) Remove top protective cover from TI.
(4) Set FULL SCALE switch to -30 dBm.
(5) Adjust function/arbitrary generator rms output for an indication of -3.0 V dc on
multimeter. If true rms voltmeter does not indicate between 7.04 and 7.1 mV ac, perform b below.