4-10
Front and Rear Panel
Display Annotation
PULSE This annunciator is turned on when pulse modulation is turned
on.
R The R annunciator is turned on when the signal generator is in
remote HP-IB operation.
RF OFF This annunciator toggles between RF OFF and RF ON and is
always visible in the display. This annunciator indicates
whether the RF signal is present at the RF OUTPUT connector.
S The S annunciator is turned on when the signal generator has
generated a service request (SRQ) over the HP-IB.
SWEEP This annunciator is turned on when the signal generator is
sweeping in list or step mode.
T The T annunciator is turned on when the signal generator is in
the talk mode and is transmitting information over the HP-IB.
UNLEVEL This annunciator is turned on when the signal generator is
unable to maintain the correct output level. The
UNLEVEL
annunciator is not necessarily an indication of instrument
failure. Unleveled conditions can occur during normal
operation. A second annunciator,
ALC OFF, will appear in the
same position when the automatic leveling control circuit is
disabled. When the ALC is disabled, the
UNLEVEL annunciator
has no meaning so these annunciators will never conflict.
UNLOCK This annunciator is turned on when any of the signal
generator’s phase locked loops are unable to maintain phase
lock. You can determine which loop is unlocked by
interrogating the error messages.
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