HP 8642A Operating Manual page 161

Operation
Model 8642A/B
SETTING MODIFICATIONS
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I SHIFT I
Instrument Preset enables you to set the Signal Genera­
tor to an initialized state. Partial Preset ( f ^ l ( S ] )
is a quick way to set the Signal Generator to another
initialized state without affecting some instrument
settings; for example, Partial Preset does not turn off
the EMF or Amplitude Relative mode.
Holding the Shift key down during power-up until
instrument settings are displayed bypasses the power-up
checks.
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^ ■ ■ M ENTRY H ^ M
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f^m STEP ■
Q
-Q
The Knob usually modifies a specific digit in the
display. The keys can select which digit will be
modified. The keys can also select Knob Hold or Knob
Increment.
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The Step keys enable you to step a function by the
value that was set using the [ SFF ] key.
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The Off/On key toggles an active function off or on
with a single keystroke.
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The Entry Off function disables the active function as
well as all Knob-related functions.
Figure 3-16. Functions Related to Modifying Settings
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