Service manual

Instrument Functions WLAN TX Measurements
R&S
®
FSV-K91/91n/91ac/91p
89Operating Manual 1176.7649.02 ─ 04
For all standards other than IEEE 802.11b & g (Single Carrier), the reference level is
set 10 dB higher than the signal level (RF) because of the expected crest factor of the
signal. For standards IEEE 802.11b & g (Single Carrier), the reference level is set to
the signal level (RF).
Remote command:
CONFigure:POWer:EXPected:RF on page 154
Auto Lvl ← Signal Level / Reference Level
Activates or deactivates the automatic setting of the reference level for measurements.
"ON"
The reference level is measured automatically at the start of each
measurement sweep. This ensures that the reference level is always
set at the optimal level for obtaining accurate results but will result in
slightly increased measurement times.
"OFF"
The reference level is defined manually in the "Signal Level / Refer-
ence Level" on page 88 field.
Remote command:
CONFigure:POWer:AUTO on page 153
CONFigure:POWer:AUTO:SWEep:TIME on page 154
Ext Att
Specifies the external attenuation or gain applied to the RF signal. A positive value
indicates attenuation, a negative value indicates gain. All displayed power level values
are shifted by this value.
Remote command:
INPut:ATTenuation on page 177
Capture Time
Specifies the time (and therefore the amount of data) to be captured in a single mea-
surement sweep.
Remote command:
[SENSe:]SWEep:TIME on page 203
PPDU Count
Activates or deactivates a specified number of PPDUs for capture and analysis.
On The data analysis is performed over a number of consecutive sweeps until the required number of
PPDUs has been captured and analyzed.
Off The data analysis is performed on a single measurement sweep.
Remote command:
[SENSe:]BURSt:COUNt:STATe on page 185
Analyze PPDUs
Specifies the number of PPDUs to be measured, if the "PPDU Count" option is activa-
ted.
Remote command:
[SENSe:]BURSt:COUNt on page 185
General Settings Dialog Box (K91)