HP 8510, User Manual

Page: 33 / 73

1.
Press 4 STIMULUS MENU 5
NNNNNNNNNNNNNN
MORE
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
TRIGGER MODE
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
TRIGGER DELAY .
Change the trigger dela y and notice that when the trigger dela y is greater than the pulse
width, the trace lev el decreases to the noise o or b ecause the measuremen t is b eing made
after the pulse has turned O.
Figure 5-7. S
11
, Frequency Domain, Pulse Width 10 s,Trigger Delay 15 s
1.
Press 4 SYSTEM 5
NNNNNNNNNNNNNN
MORE
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
PULSE CONFIG
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
PULSE WIDTH . Change the pulse width v alue. Notice
that as y ou increase the pulse width past a certain p oint, the measuremen t time for eac h
data p oint will increase.
2.
Press
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
DUTY CYCLE . Change the the dut y cycle limit. This c hanges the maximum dut y
cycle p ercen t allo w ed b y the in ternal measuremen t timing logic. Notice that com binations
of long pulse width and low p ercen t dut y cycle will increase the measuremen t time for eac h
data p oint.
Note
F requency Domain System Dut y Cycle
In the F requency domain:
Without a v eraging, pulse width and dut y cycle settings resulting in less than
ab out 30 milliseconds PRP will not c hange the actual system PRP .
With a v eraging, pulse width and dut y cycle settings resulting in less than
ab out 1 millisecond PRP will not c hange the actual system PRP .
T o learn more ab out con trol of these v alues, refer to the General Timing
Information c hapter.
5-8 Operating the HP 8510 for Pulsed-RF Measurements