HP (Hewlett-Packard) 22A 用户手册

Analyzer: 

NONE

 listed above.

SERVICE

This 

 displays the latched status of the following fault

messages.

PEAK FAIL

Indicates that the peak algorithm is unable to align
the YTM 

 to the frequency of the YO.

This fault indication is possible only if a peaking or
autotrack routine has been initiated.

TRACK FAIL

RAMP FAIL

SPAN FAIL

 FAIL

ADC FAIL

Indicates that the autotrack algorithm is unable to
calculate the calibration constants needed to track
the YTM 

 to the frequency of the YO.

This fault indication is possible only if an autotrack
routine has been initiated.

Indicates that the ramp algorithm is unable to adjust
the sweep ramp voltage to 

 at the end of

the sweep. Initiate a full self-test to gather more
information if this fault is indicated.

Indicates that the span algorithm is unable to adjust
the YO to achieve the correct frequency at the end
of a band. This fault indication is possible only if a

sweep span routine has been initiated.

Indicates that the internal YO 

 line adjusted

at power-on or at preset is unable to calibrate.
Initiate a full self-test to gather more information if
this fault is indicated.

Indicates that the ADC (analog-to-digital converter)
is not responding to a measurement request within
the time-out period. The ADC is used extensively
in the operations of the synthesizer. Initiate a full

self-test to gather more information if this fault is

indicated.