GUI reference
R&S
®
ZNB/ZNBT
420
User Manual 1173.9163.02 ─ 62
5.9.2
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 5.10.2.2, "Define Segments dialog"
Bandwidth
"Bandwidth" the measurement bandwidth of the IF filter. Within the value range, the
entered value is rounded up to 1 · 10
n
Hz, 1.5 · 10
n
Hz, 2 · 10
n
Hz, 3 · 10
n
Hz, 5 · 10
n
Hz, 7 · 10
n
Hz (n
≥
0). Values exceeding the maximum bandwidth are rounded down.
The regular bandwidth range is 1 Hz to 1 MHz. Option R&S
ZNB-K17/R&S
ZNBT-K17
enables bandwidths up to 10 MHz (see
Chapter 4.7.5, "Receiver bandwidth 10
Remote command:
[SENSe<Ch>:]BANDwidth[:RESolution]
[SENSe<Ch>:]BWIDth[:RESolution]
Power Bw Avg softtool
