HP 8510

Figure 9-1. External Control of PRP and Duty Cycle
Synchronization is assured because time equals zero seconds for each measurementcycle
is
dened
as
the
rst
falling
edge
of the
trigger
input
after
stop
sw
eep
is
ready
(high).
Figure 9-1
b
sho
ws
connection
of
an
external
pulse
mo
dulator
instead
of the
in
ternal
mo
dulator
in
the
RF
source.
Figure 9-2 sho
ws results using this pulse mo dulation and triggering metho d
when the
pulse mo
dulation input to the RF source is a con
tinuous train of 10 microseconds PRP
,50
percen
t dut
y cycle pulses. The same input is applied to TRIGGER
IN, and TRIGGERING
EXTERNAL is
selected.
9-2
Using
External
Triggering
and
Pulse
Modulation