User`s guide

Agilent PXT Wireless Communications Test Set
User’s Guide
14
Mode
BSE, SA
Range
Auto | Manual | Adaptive
Preset
Auto
Dependencies/Couplings
This menu key is coupled to RF1 Input Attenuation settings.
Initial S/W Revision 6.0
Adaptive attenuation was added in software revision 6.4.
Selecting Func > UE Power Control > CLCP sets Attenuation = Adaptive
but the reverse is not true.
Key Path
Atten
Adaptive Attenuation - More Information
Adaptive attenuation is intended to eliminate manual attenuation control when the UL or DL path loss is
indeterminate, and allows automatic control by the instrument.
The simplest way of demonstrating adaptive attenuation is to connect your device, set UL Resource
Allocation Mode to Fixed Mac Padding
(Mode > BSE > Mode Setup > More > PHY Settings > UL
Resource Allocation), then Press SA > Func > UE Power Control and adjust the power. The power
measurement must track the power control settings sent to the UE, therefore you must set Power Adjust
(All Up) = On
.
With the default settings, you may find this process a little slow to adjust. If this is the case, use the OVF
adjuster button (Atten > More > OFV_ADJUSTER) to 5 dB and re-try. Then, set Power Adjust (All Down) =
On
, as shown in the figure below.