Operation
Model 8642A/B
Operating Messages (cont'd)
Information Messages
Local: These messages are automatically displayed when you execute a function.
HP-IB:
Most of these messages can be output via HP-IB using the Output Display capability after you
execute a function. II, 12, 159, and 160 cannot be read via HP-IB. To understand a way to read 141
through 149 and 151 through 159, refer to that message description on the following page.
Information messages (message code is prefixed with "I") provide useful information about instrument
settings or conditions.
INSTRUMENT PRESET .11
Instrument Preset is being executed. Refer to Instrument Preset, Partial Preset, page 3-138. This
message cannot be read via HP-IB using Output Display because it automatically clears from the display
after execution completes.
PARTIAL PRESET .12
Partial Preset is being executed. Refer to Instrument Preset, Partial Preset, page 3-139. This message
cannot be read via HP-IB using Output Display because it automatically clears from the display after
execution completes.
YYMMDD = FIRMWARE CODE .13
This message is an example of the Signal Generator's display of the current firmware version which is
accessed with Special Function 249. In this example, YYMMDD represents the numbers that will appear
in the display where YY is the last two digits of the year, MM is the number of the month, and DD is the
day of the month. For example, 57021 8 would be February
1
8, 1957.
KNOB INCR TURNED OFF 111
Knob increment mode was turned off. Cursor positioning keys (HP-IB: KL or KR) turn off the Knob
Increment mode.
SETTINGS DISPLAY OFF .121
Special Function
1 3 5
(Disable Display) was selected and the display of the instrument settings is disabled.
Special Function 235 (Re-enable Display) re-enables the display of instrument settings.
PHASE STEP DOWN 1 DEG .122
PHASE STEP UP 1 DEG .123
The RF signal's output phase was stepped down by 1 degree.
The RF signal's output phase was stepped up by 1 degree.
These messages are activated with Special Function 250. Refer to RF Frequency, page 3-42.
SPCL FUNC VERIFY OFF .124
Special Function 111 (Special Function Verify Off) was selected and the automatic Special Function
verification is disabled. A special function description will not be displayed automatically whenever a
special function is selected. The display of special function descriptions can be re-enabled with Special
Function 211.
ENTERING SERVICE MODE .125
Entering the Service Mode. Special Function 3 was just selected. Either refer to page 3-201 for
information about writing messages to the display, or refer to the Service Manual or On-Site Manual for
information about using Special Function 3 for servicing the instrument. Select any function to exit this
mode.
3-194
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