Operation
Model 8642A/B
Special Functions (cont'd)
DETAILED DESCRIPTIONS OF ALL SPECIAL FUNCTIONS (cont'd)
248.
Calibrate the Modulation Frequency Bands Again. This special function enables you to initiate the
calibration sequence that normally only occurs during instrument power up. This function can be used,
for example, to recalibrate the modulation oscillator frequency bands if normal modulation frequency
correction has been disabled with Special Function
1 1
3. Calibration typically takes one to two seconds.
Refer to Modulation Frequency, page 3-133.
249.
Display Firmware Information. This special function displays the current firmware version with a
message such as "YYMMDD = FIRMWARE CODE .13". 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, 841225 would be December 25, 1984.
250.
Phase Adjustment from Knob and Step Up and Step Down Keys. This function enables control over
the RF signal's output phase in one degree steps using either the Knob or Step keys.
251.
Clear Recall Registers. This special function clears all recall registers.
3-176
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