Chapter 7 7-3
Error Messages
Status Messages
Status Messages
The following messages indicate a condition that may result in
erroneous data being displayed. In each case the name of the
corresponding status bit is indicated in parenthesis. It will be noted if
only a status bit is used (no message).
50 MHz Osc Unlevel (50 MHz Osc Unleveled)
The internal 50 MHz amplitude reference source has
become unleveled. This condition must be corrected
before a valid alignment can be performed.
(ADC Align Failure)
A status bit only, no message. The auto alignment
routine was unable to align the analog-to-digital
converter (ADC).
Align Now All Needed (Align Needed)
The instrument requires an
Align Now, All. Restore the
alignment by pressing
System, Alignments, Align Now,
All. On all HP ESA spectrum analyzer models except
HP E4401B and HP E4411B you must connect the
AMPTD REF OUT to the INPUT with the appropriate
cable to perform this alignment.
Align Now RF Needed (Align Now RF Needed)
The instrument requires an
Align Now, RF. Restore the
alignment by pressing
System, Alignments, Align Now,
RF (EXT Cable). On all HP ESA spectrum analyzer
models except HP E4401B and HP E4411B you must
connect the
AMPTD REF OUT to the INPUT with the
appropriate cable to perform this alignment. For
HP E4401B and E4411B only: disconnect any signals
from the
INPUT prior to performing this procedure.
Align RF Skipped (Align RF Skipped)
The RF alignment has been skipped because a 50 MHz
signal was detected at the INPUT; alignment will
resume when the 50 MHz signal is removed. The
alignment will not work when there is too much input
power at 50 MHz. The instrument may not continue to
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