Technical data

85108L System Manual
Operation
Pulsed-RF Measurements Overview
3-20
5. Press
DOMAIN, [PULSE PROFILE].
6. Press:
STIMULUS MENU, [FREQUENCY LIST], [SINGLE SEGMENT].
The last selected segment will be active as shown in Figure 3-15.
Figure 3-15 Pulse Profile, Frequency List Segment Number 1
To measure another frequency, select the appropriate active segment.
When either the pulse profile domain or the frequency list calibration procedures is complete,
connect the device for measurement. Again, in both of these procedures, note that when you press
the key to measure the calibration standard, the 8510 pulse output is set to the active state (RF
always On) during measurement of the standard. This ensures that the calibration data at every
point is with respect to the On portion of the pulse. If external pulse modulation is used, it is
necessary that the RF is On during measurement of the calibration standard.
Measurement
After calibration, first view the response of one of the calibration standards. This example (Figure
3-16) showing S21 of the thru connection is typical: the trace is flat at 0 dB when the pulse is On
and noisy around 0 dB when the pulse is Off. The noise during pulse Off will vary depending on the
relative signal levels in the reference and test signal paths.