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Machine malfunction:
If the UNLEVELED annunciator lights, and the cause is not a request for
excessive power, one or more of the power circuits are malfunctioning. If this happens, press
[INSTR
PRESET]
which will restore standard instrument conditions, then re-enter the desired instrument
configuration. If the UNLEVELED annunciator remains lighted, shut down the instrument and consult
the In Case of Difficulty section in this manual.
Exception:
open-loop operation. The ALC can be bypassed by pressing
[SHIFT] [METER],
as
described in Figure 3-16. Under these conditions the UNLEVELED annunciator is lighted, but acts as a
reminder in this case instead of a warning.
DIAGNOSTICS
Test this display (and the three other displays) by pressing and holding
[INSTR PRESET],
which will
cause the UNLEVELED annunciator to light, then release
[INSTR PRESET]
and press
[SHIFT] [FREE
RUN]
which will light every segment of the LED display
("88888").
Press
[INSTR PRESET]
or cycle
the POWER switch to cancel this diagnostic test.
NOTE:
[INSTR PRESET]
will restore the instrument to its standard starting condition. Cycling
POWER switch will restore the instrument to its previous state.
Figure 3-3.
Power dBm Display (2 of 2)
3-14
Operating Information
HP 8340B/41B
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