Product specifications

PNA-X wideband pulse

measurements

Wideband pulse measurements are accomplished by modulating the RF source,

setting the IF bandwidth wide enough to capture all pulse spectrum, and

synchronizing the modulation and measurements with appropriate triggering

and delay settings. The internal pulse generators and modulators can be

controlled either by SCPI/COM commands or the Pulse Setup dialog added

with Option 008 pulsed-RF measurements.

Wideband pulse data acquisition

The PNA-X with DSP version 4 requires 16 samples with its widest IF bandwidth

of 5 MHz to get a single data point, which takes 267 ns (16.7 ns per sample)

with its 60 MSa/s ADC. The PNA-X with DSP version 5 enables widest IF

bandwidth of 15 MHz and requires only 10 samples, which takes 100 ns (10 ns

per sample) with its 100 MSa/s ADC. Figure 12 shows how the data acquisition

progressed in point-in-pulse and pulse-to-pulse measurements with wideband

detection technique. The RF carrier frequency of point-in-pulse is increased at

every data point, thus each data point needs to be calculated with the required

number of samples for specified IF bandwidth within the same pulse. The

minimum pulse width for wideband point-in-pulse measurements at widest IF

bandwidth is 267 ns with DSP version 4 and 100 ns with DSP version 5 (refer to

Table 1 for a list of bandwidths and the associated minimum pulse width).

Figure 12. Wideband point-in-pulse and pulse-to-pulse data acquisition with widest

IF bandwidth