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Model 5304 A
Maintenance
performance checks indicate a malfunction or if
instrument operation is suspect, perform the Self-
Check procedures in Table 9D-5-1. For further tests,
separate the 5304A from the casting and reconnect
to 5300A using Paragraph 9D-5-6 steps a to e as
a guide.
Operating procedures in Subsection 9D-3
can be used to help understand operation.
To test
the 5304A, obtain
the test equipment listed
in
Table 5-1 of the 5300A portion of the manual.
9D-5-15. Figure 9D-5-2 to Figure 9D-5-6 are trouble-
shooting flow diagrams for each of the five modes
of operation. Signal flow is outlined for each mode
and waveform test points and voltage test points
are indicated.
The waveforms or voltage level
for each mode is included with the figures.
To
obtain the waveforms a n d / o r levels for each mode,
follow the directions for instrument
connections
which are listed with the troubleshooting flow dia-
grams of each respective mode.
9 D - 5 - 1 6 . DC BALANCE A D J U S T M E N T
9D-5-17.
If Channel A or Channel B fail to oper-
ate with their respective LEVEL controls in PSET
position when measuring sine wave signals, or when
periodic maintenance/calibration is performed, the
dc balance may be adjusted as follows:
a. Connect an HP 651B Oscillator, set to 10
MHz, 50 mV rms/5012, through a 50 OHM BNC Feed-
thru Termination, to Channel A input.
b. Set the 5304 A controls as follows;
ATTEN to XI (both channels).
AC-DC to AC (both channels).
+, - to + (both channels).
LEVEL to PSET (both channels).
SEP-CHK to SEP
"Function" to FREQ A, AUTO
c. Connect an HP 180A oscilloscope through
a 10 Mi) pi obe to U18(6).
d. Adjust the oscilloscope controls to monitor
a useable signal.
e. Adjust A1R20 for a symmetrical waveform
with minimum or no change in duty-cycle when
SLOPE switch is changed from + to - and minimum
or no change when AC-DC switch is set to AC
or DC.
f. Connect the oscilloscope probe to U18(8)
and the 651B input signal to Channel B.
g. Adjust A1R19 for a similar display observed
in step e.
9D-5-3
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