Set Pulse Width; Set Duty Cycle Limit; Set Measurement Time Span; Set Measurement Resolution Period - HP 8510 User Manual

For internal pulse modulation and internal triggering, time equals zero seconds is always the
point where the pulse transitions to the active level. The internal pulse modulator in the RF
source turns the RF pulse On when the analyzer output is positive, so the noisy part of the
trace will change location depending on the pulse polarity.

Set Pulse Width

After instrument preset, the pulse width is set to 10 microseconds. To set a di erent pulse
width:
Press NNNNNNNNNNNNNN
MORE
4 SYSTEM 5
Use the knob, step keys, or numeric entry to set the desired pulse width.

Set Duty Cycle Limit

After instrument preset, the duty cycle limit is set to 10%. This means that the maximum
duty cycle will never be allowed to be greater than 10 percent regardless of the pulse width.
To set the duty cycle limit, press
knob, step keys, or numeric entry to set the desired maximum duty cycle limit. Note that the
actual duty cycle may be less.

Set Measurement Time Span

The HP 8510 automatically chooses the minimum possible (given the HP 8510 hardware
and rmware capabilities) time between samples, and thus the measurement resolution
period, depending upon the larger of the pulse width time or the stop time. This results in a
minimum possible span time which depends upon the current number of points.
To view the pulse with minimum sample resolution period and thus the best time resolution,
press , then repeatedly press the
4 STOP 5
does not change (or enter
If the pulse is longer than this time span, increase the stop time to view the entire time period
of interest.

Set Measurement Resolution Period

To nd the resolution period, press
the time change in the Active Entry area. If necessary, adjust the resolution period to the
value required for your measurement by changing the stop time, pulse width, and number of
points.

Connect the Device under Test

With the pulse width set, connect the device under test. Figure 7-4 shows the response of the
device to the pulsed-RF stimulus at the current frequency.
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
PULSE CONFIG PULSE WIDTH
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
DUTY CYCLE
key until the time value at the bottom of the grid
9
). This also sets the start time to the minimum value.
4 STOP 5 4 0 5 4 x1 5
4 MARKER 5
.
on the Pulse Con guration menu. Use the
, then move the marker one data point and see
Pulse Profile Domain Measurements 7-5