IMPORTANT
All circuit voltages were obtained with a 20,000 12/Volt VOM. All read
ings are in volts.
Waveforms were obtained using a Type 530-Series Oscilloscope with
a Type L Plug-In Unit and 10X probe. An equivalent oscilloscope hav
ing a bandwidth of dc to 10 me or better and equal sensitivity can be
used instead.
Waveform dc levels with respect to ground are indicated at the right
side of waveform; measured when test oscilloscope AC-DC switch was
set to DC.
Waveforms were photographed with test oscilloscope AC-DC switch
set to AC; vertical deflection factor and Time/Cm switch set to those
settings indicated adjacent to waveforms. In most cases +Ext. AC trig
gering on the Type 544 1-kc AMPLITUDE CALIBRATOR signal was used.
Exception: +lnt. triggering mode is also used; this mode, if used, is
indicated above the waveform.
NOTE
Number of cycles displayed by waveform
when calibrator signal was used as a trig
ger source depends mostly on the signal
repetition rate. Though +Ext. triggering
was used, a time difference of 1 msec can
occur between waveforms because the test
oscilloscope can trigger on a different cycle
than the Type 544 and vice versa.
Voltage and waveform measurements may vary between instruments
due to normal component tolerances.
Plug-in unit that was used in the Type 544 is a Type TU-7 Test Unit.
Front-panel controls and other conditions that apply to all schematic
diagrams are as follows:
Input Signal
.........
None
Position...................Centered
(Exception: See Vertical
Amplifier schematic diagram)
Test Function .... Low Load
Any letter-series, 1-series plug-in unit or the TU-2 can be used in place
of the Type TU-7 when troubleshooting the Type 544.
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