GUI reference
R&S
®
ZNA
486User Manual 1178.6462.02 ─ 20
IF Filter (analog)
Selects the analog IF signal path.
"Normal"
Standard high precision path
"Wideband"
Wideband path with 50 MHz lowpass filter
"Narrowband"
Narrowband path with 10.7 MHz bandpass filter
Can only be selected if Direct IF access is not used as Receiver Input.
Remote command:
[SENSe<Ch>:]IFPath
IF Filter (digital)
Selects the shape of the digital IF filter:
●
"Normal" selectivity filters provide a short settling time (recommended for fast mea-
surements).
●
"High Selectivity" filters have steep edges and the longer settling times. This filter
type is suitable for isolating adjacent signals which are separated by a small fre-
quency spacing.
Remote command:
[SENSe<Ch>:]BANDwidth[:RESolution]:SELect
[SENSe<Ch>:]BWIDth[:RESolution]:SELect
Dynamic Bw at Low Frequencies
If "Dynamic Bw at Low Frequencies" is enabled, then at receiver frequencies below
500 MHz the analyzer reduces the selected IF Bandwidth by a frequency-dependent
(dynamic) factor. The bandwidth reduction reduces the trace noise at small frequencies
and improves the accuracy of the time domain transform.
Remote command:
[SENSe<Ch>:]BANDwidth[:RESolution]:DREDuction
5.9.3 Average tab
Defines the number of consecutive sweeps to be averaged and enables/disables the
sweep average.
Effects of sweep averaging, alternative settings
An average over several sweeps reduces the influence of random effects in the mea-
surement and therefore minimizes the noise level. The effect increases with the aver-
age factor, however, obtaining an averaged result requires several sweeps and there-
fore increases the measurement time.
Smoothing is an alternative method of compensating for random effects on the trace by
averaging adjacent measurement points. Compared to the sweep average, smoothing
does not significantly increase the measurement time but can eliminate narrow peaks
and thus produce misleading results.
The sweep average is not frequency selective. To eliminate a spurious signal near the
measurement frequency, alternative techniques (e.g. a smaller filter bandwidth) must
be used.
Pwr Bw Avg softtool
To Next Page
Loading...
