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402 Chapter5
One-Button Measurement Functions
Meas Setup (Channel Power—CHP)
One-Button Measurement Functions
5.14.5 Optimize Ref Level
Sets the input attenuator to optimize the robustness of the measurement, which is its
freedom from errors due to input compression.
NOTE There will always be a minimum of 6 dB of attenuation set to protect the
analyzer input.
Key Path:
Meas Setup
State Saved: Not saved.
Remote Command:
[:SENSe]:POWer[:RF]:RANGe:AUTO ONCE
Example: POW:RANG:AUTO ONCE
5.14.6 RRC Filter
Pressing RRC Filter turns the Root Raised Cosine filter on or off. This filter is the type
specified in the TETRA and 3GPP W-CDMA standards. This parameter is only available
when either 3GPP W-CDMA or TETRA has been selected as the Radio Std from the Mode Setup
menu. If 3GPP W-CDMA is selected, the roll-off value (alpha) for the filter will be initially set
to 0.22. T is set to 1/RefBW (default 260 ns). If TETRA is selected, the roll-off will be initially
set to 0.35. T is set to 1/RefBW (default 55.56 µs). The roll-off value can be changed using
Filter Alpha.
Key Path:
Meas Setup
State Saved: Saved in instrument state.
Factory Preset: Off
History: Added with firmware revision A.03.00.
Remote Command:
[:SENSe]:CHPower:FILTer[:RRC][:STATe] OFF|ON|0|1
[:SENSe]:CHPower:FILTer[:RRC][:STATe]?
Example: CHP:FILT 1
CHP:FILT?
5.14.7 Filter Alpha
Press RRC Filter to input the alpha value for the RRC Filter. This parameter is only
available when either 3GPP W-CDMA or TETRA has been selected as the Radio Std. from the
Mode Setup menu.