HP 8340A Operating Manual page 73

Operating Information
Machine malfunction:
request for excessive power, one or more of the power circuits are malfunctioning. If this
happens, press
[INSTR PRESEl]
re-enter the desired instrument configuration. If the UNLEVELED annunciator remains
lighted, shut down the instrument and consult Section VIII (Service) of this manual.
Exception: open-loop
[METER], as described in Figure 3-16.
annunciator is lighted, but acts as a reminder in this case irn>tead of
DIAGNOSTICS
Test this display (and the three other displays) by pressing and holding
which will cause the UNLEVELED annunciator to light, then release
and press [SHIFT] [FREE RUN]
("88888"). Press
3-8
If the UNLEVELED annunciator lights, and the cause is not a
which will restore standard instrument conditions, then
operation. The ALC can
which will light every segment of the LED display
[SHIFT] [M5] to cancel this diagnostic test.
Figure 3-3. Power dBm
Scans by HB9HCA and HB9FSX
be bypassed by pressing
Under these conditions the UNLEVELED
Display (2 of 2)
Model 8340A
[SHIFl]
warning.
a
[INSTR PRESET],
[INSTR PRESET]