GUI Reference
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User Manual 1173.9557.02 ─ 13
Bandwidth
Sets the measurement bandwidth of the IF filter. Values can be set between 1 Hz and
300 kHz. The entered value is rounded up to 1.5 * 10
n
Hz, 2 * 10
n
Hz, 3 * 10
n
Hz, 5 *
10
n
Hz, 7 * 10
n
Hz, 10 * 10
n
Hz (n = 1 to 5). Values exceeding the maximum bandwidth
are rounded down.
Remote command:
4.4.1.3
Power Bw Avg > Average
Define the number of consecutive sweeps to be averaged and enables/disables the
sweep average.
Effects of sweep average, 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 average
factor, however, obtaining an averaged result requires several sweeps and therefore
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 in the
vicinity of the measurement frequency from the trace, alternative techniques (e.g. a
smaller filter bandwidth) must be used.
In contrast to the sweep count (for single sweep mode), averaging is always channel-
specific. Both features are completely independent from each other.
The average factor is also valid for calibration sweeps: The calculation of system cor-
rection data is based on the averaged trace.
Access:
CHANNEL > POWER BW AVG key or Alt + Shift + L
Channel Settings