HP 8360 - Manual (Page 178)

CONNECTORS
STOP SWEEP IN/OUT stops a sweep 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 synthesizer stops its sweep. Externally forcing
this input high will not cause damage or disrupt normal operation.
10 MHz REF INPUT accepts a 10 MHz Hz, 0 to
reference signal for operation referenced to an external time base.
Nominal input impedance is 50
10 MHz REF OUTPUT provides a 0 10 MHz signal derived
from the internal frequency standard of the synthesizer. This input
is a
connector that can be used as the master clock reference
output for a network of instruments.
TRIGGER INPUT activated on a TTL rising edge. Used to
externally initiate an analog sweep or to advance to the next point of
a step list or a frequency list.
TRIGGER OUTPUT Produces a 1 wide TTL-level pulse at 1601
points evenly spaced across an analog sweep, or at each point in a
step list or a frequency list.
supplies a voltage that is proportional to the RF
output frequency, with a ratio of 0.5 volt output for every 1 of
RF frequency (factory setting). This ratio is switchable to either
0.25 or 1 volt. The switch is located on the
SYTM assembly, see
Adjustments in the Service Guide for information.
Z-AXIS supplies a positive rectangular pulse
(approximately into 2 during the retrace and switch points
when the synthesizer is sweeping. This output also supplies a
pulse when the RF output is coincident with a marker frequency.
Multi-pin Connectors AUXILIARY INTERFACE connector provides control signals to the
HP S-parameter test set switch doubler. This connector is a
D-subminiature receptacle located on the rear panel. It is also
used for dual synthesizer measurement systems (two-tone systems),
refer to Step Control Master for more information.
Operating and Programming Reference HP 8360
User’s Handbook