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682XXB/683XXB MM 5-9
ERROR AND WARNING/
TROUBLESHOOTING STATUS MESSAGES
Warning/Status
Message
Description
OVN COLD
This warning message indicates that the 100 MHz
Crystal oven (or the 10 MHz Crystal oven if Option 16 is
installed) has not reached operating temperature.
Normally displayed during a cold start of the signal
generator. If the message is displayed during normal
operation, it could indicate a malfunction. Run self-test
to verify.
UNLEVELED
Displayed when the RF output goes unleveled. Normally
caused by exceeding the specified leveled-power rating.
Reducing the power level usually clears the warning
message.
If the warning message is displayed only when AM is
selected ON, the modulating signal may be driving the
RF output unleveled. Reducing the modulating signal or
adjusting the power level usually clears the warning.
UNLOCKED
When Unlocked/Narrow FM or Unlocked/Wide FM is
selected ON, this warning message appears indicating
that the instrument is not phase-locked during this FM
mode of operation.
Reduce Rate
This warning message is displayed when the AM Rate
or FM Rate is set >100 kHz for a non-sinewave
modulating waveform. Amplitude or frequency
modulation of the output signal will continue but the
modulating waveform may be distorted.
EXT REF
This status message indicates that an external 10 MHz
signal is being used as the reference signal for the
682XXB/683XXB.
OFFSET
This status message indicates that a constant (offset)
has been applied to the displayed power level.
SLOPE
This status message indicates that a power slope
correction has been applied to the ALC.
USER 1...5
This status message indicates that a user level flatness
correction power-offset table has been applied to the
ALC.
SS MODE
This status message indicates that the 682XXB/683XXB
has been placed in a source lock mode for operation
with a 360B Vector Network Analyzer.
Table 5-3. Possible Warning/Status Messages during Normal Operation