R&S 1332.4500K22, Руководство пользователя

Страница: 485 / 1709

GUI reference
R&S
®
ZNA
485 User Manual 1178.6462.02 ─ 20
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" , on page 499.
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 bandwidth range is 1 Hz to 1.5 MHz. Option R&S ZNA-K17 enables measurement
bandwidths up to 30 MHz (see Chapter 4.7.8, "Increased IF bandwidth 30 MHz" ,
on page 259). Bandwidths above 1.5 MHz are only available for the wideband signal
path (see
"IF Filter (analog)" on page 486).
For spectrum measurement channels , the resolution bandwidth (RBW) is set
instead of the IF bandwidth. The label changes accordingly. Currently the RBW is limi-
ted to 1.5 MHz, no matter if option R&S
ZNA-K17 is installed.
Remote command:
[SENSe<Ch>:]BANDwidth[:RESolution]
[SENSe<Ch>:]BWIDth[:RESolution]
Pwr Bw Avg softtool