Rohde & Schwarz SMBV100B, Руководство пользователя

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Configuring the RF Signal
R&S
®
SMBV100B
401 User Manual 1178.4460.02 ─ 03
"Auto" Selects the filter length automatically and adjusts it to the measured
value. The value is indicated with the parameter
Filter Length .
When high output power is applied, the filter length and therefore the
measurement time can be short.
When low output power is applied, the filter length and therefore the
measurement time is increased which reduces the considered noise
content in your measurement.
"User" The filter length is defined manually, with the parameter Filter Length .
As the filter length works as a multiplier for the time window, constant
filter length results in a constant measurement time.
Values 1 and 2N are allowed.
"Fixed Noise" The averaging factor is taken automatically in accordance to the
value
Noise/Signal Ratio . Thus, the sensor's intrinsic noise (2 stan-
dard deviations) does not exceed the specified noise content.
To avoid long measurement times when the power is too low, set a
Timeout .
Timeout is the maximum acceptable measurement time which limits
the averaging factor and therefore leads to a more unstable readout.
Remote command:
:SENSe<ch>[:POWer]:FILTer:TYPE
on page 658
Filter Length ← Sensor Settings
Sets or indicates the filter length, depending on the selected filter mode.
●
"Filter > Auto" indicates the automatically adjusted filter length.
●
"Filter > User" enables you to set the filter length manually.
●
"Filter > Fixed Noise" hides the setting parameter.
Remote command:
:SENSe<ch>[:POWer]:FILTer:LENGth:AUTO?
on page 656
:SENSe<ch>[:POWer]:FILTer:LENGth[:USER]
on page 657
Auto Once ← Sensor Settings
Searches the optimum filter length for the current measurement conditions. The result
is indicated with the parameter
Filter Length .
See also "About the measuring principle, averaging filter, filter length, and achieving
stable results" on page 396.
Remote command:
:SENSe<ch>[:POWer]:FILTer:SONCe
on page 658
Noise/Signal Ratio ← Sensor Settings
For Filter > Fixed Noise , sets the noise content.
Remote command:
:SENSe<ch>[:POWer]:FILTer:NSRatio
on page 657
Timeout ← Sensor Settings
For "Filter > Fixed Noise", sets a time limit for the averaging process.
Remote command:
:SENSe<ch>[:POWer]:FILTer:NSRatio:MTIMe
on page 658
Improving Level Performance