HP 8642A - Page 243

Model 8642A/B Appendix D
Appendix D: DISPLA V ANNUNCIATORS AND ABBREVIATIONS
AMT LSTN SlAAT TU< SRO FREe REL EMf SPCL SWPNG HIl.D 'I>MFM AM STAAT INT EXT ACOG AMPTD REL STOP MSSG
The front-panel display annunciators usually indicate the state of the Signal Generator; that is,
they indicate which functions are currently affecting the output. Each of these annunciators are
listed in the order they appear in the display. The explanations below describe the purpose of
each annunciator.
RMT,LSTN,TLK,SRO
These annunciators indicate the HP-IB status of the Signal Generator.
START
The START annunciator in the left portion of the display indicates that RF frequency sweep is
selected and a start frequency is currently displayed.
FREO
This annunciator indicates the RF frequency is being displayed.
REL
The REL annunciator in the left portion of the display indicates the current RF frequency is
displayed in relative units.
EMF
When EMF is displayed, amplitude is in EMF units.
SPCL
When SPCL is displayed, a special function is currently selected.
SWPNG
During normal instrument settings display, SWPNG indicates that either an RF frequency or
amplitude sweep is currently taking place.
HI, LO
HI and LO can be used to indicate whether the external modulation source level is too high or
too low to obtain the displayed depth or deviation.
cI>M, FM, AM
These annunciators can indicate the type or types of modulation selected.
START
When the START annunciator in the left portion of the display appears with the AMPTD
annunciator, a start amplitude is currently displayed. When this annunciator appears without
the AMPTD annunciator",a sequence is being set.
INT, EXT, AC, D\,.,
Combina tions of these ann uncia tors display the current status of the modulation source for the
dIsplayed modulation type.
AMPTD
AMPTD indica tes that the output amplitude is being displayed.
REL
The REL annunciator in the right portion of the display indIcates the current output amplitude
~¥C;F5ed in relative units.
The STOP annunciator can indicate that the stop frequency of the RF frequency sweep is
currently being displayed, or that the stop amplitude of amplitude sweep is currently being
displayed,
or that sequence is being set.
MSSG
When MSSG is displayed, you can select the Message key to display a queued-up message.
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