External Control Of Prp And Duty Cycle - HP 8510 User Manual

Figure 9-1. External Control of PRP and Duty Cycle
Synchronization is assured because time equals zero seconds for each measurement cycle
is de ned as the rst falling edge of the trigger input after stop sweep is ready (high).
Figure 9-1b shows connection of an external pulse modulator instead of the internal modulator
in the RF source.
Figure 9-2 shows results using this pulse modulation and triggering method when the
pulse modulation input to the RF source is a continuous train of 10 microseconds PRP, 50
percent duty cycle pulses. The same input is applied to TRIGGER IN, and TRIGGERING
EXTERNAL is selected.
9-2 Using External Triggering and Pulse Modulation