Rohde & Schwarz R&S ZNB - Bandwidth Tab; Power Bw Avg Softtool; Power Tab

GUI Reference
R&S
®
ZNB/ZNBT
390User Manual 1173.9163.02 ─ 53
6.9 Power Bw Avg Softtool
The "Power Bw Avg" softtool allows you to configure the signal power, to set up the IF
signal processing, and to configure the averaging logic.
Access: CHANNEL – [PWR BW AVG] hardkey
6.9.1 Power Tab
The "Power" tab allows you to configure the signal power. It is identical to the "Stimu-
lus" > "Power" tab; see Chapter 6.8.2, "Power Tab", on page 386.
6.9.2 Bandwidth Tab
Sets the measurement bandwidth and the shape of the digital IF filter for the active
channel.
A system error correction (calibration) remains valid when the filter settings are
changed.
Optimizing the filter settings
A small bandwidth and a high selectivity of the digital IF filter suppress the noise level
around the measurement frequency, and thus increase the dynamic range. However,
the measurement time increases with smaller filter bandwidths and high selectivity. For
small bandwidths, the filter settling time, which is inversely proportional to the band-
width, is responsible for the predominant part of the measurement time.
The characteristics of the high selectivity filter make it particularly suitable for isolating
unexpected spurious responses or known mixer products.
Segmented sweeps
In segmented frequency sweeps, the filter settings can be selected independently for
each segment. see Chapter 6.10.2.2, "Define Segments Dialog", on page 402.
Power Bw Avg Softtool