HP 83751A User Manual page 75

Front/Rear Panel
Connectors
STOP SWEEP
This rear panel female BNC connector causes a sweep to be
stopped when this input is pulled low. Retrace does not
occur, and the sweep resumes when this input is pulled
high. The open circuit voltage is TTL high and is internally
pulled low when the instrument stops its sweep. The
damage level is 2 + 10 V or 5 -4 V.
SWEEP OUT
These front and rear panel female BNC connectors provide
a voltage range of 0 to + 10 V. When the instrument is
sweeping, the SWEEP OUT ranges from 0 V at the beginning
of the sweep and + 10 V at the end of the sweep regardless
of the sweep width. In CW mode, the SWEEP OUT ranges
from 0 V at the sweeper minimum frequency to + 10 V
at the specifled maximum frequency, with a proportional
voltage for frequencies between the specified minimum and
maximum. When the sweeper is in manual sweep operation,
the SWEEP OUT voltage is a percentage of the span. The
nominal output impedance is 100 61. The typical accuracy is
When used with the HP 8757D scalar analyzer in
ramp-sweep mode, the rear panel output is a series of 0 to
+ 10 V pulses similar to the Trigger Output.
TRIGGER This rear panel female BNC input is activated on a TTL
INPUT
rising edge. It is used to externally initiate an analog sweep
or to advance to the next point in stepped sweep mode. The
damage level is 2 + 10 V or 2 -4 V.
TRIGGER This rear panel female BNC connector outputs a 1 ,ns wide
OUTPUT negative-going TTL pulse at 1601 points evenly spaced
across an analog sweep, or at each point in stepped sweep
mode. When used with the HP 8757D scalar analyzers, the
number of pulses per sweep (in analog sweep mode) is
determined by the number of HP 8757 trace points.
This rear panel female BNC connector supplies a voltage
OUTPUT that is proportional to the RF output frequency, which can
be configured to any desired sensitivity and offset within
a f12 V range. The default setting is 0.5 V/GHz. The
minimum load impedance is 2 kbl. The typical accuracy is
7-6