User`s guide

Agilent PXT Wireless Communications Test Set
User’s Guide
192
Key Path:
Atten
Preset:
RF 1 and RF2 reference level
RF 1 and RF2 attenuation mode
RF1 and RF2 attenuation value
RF1 and RF2 power offset
0 dBm
Auto
49 dB
0 dB
Notes:
The Ref Level and the Scale/Div settings are applied to all the Power
Spectrum and Power vs. Time displays.
Refer to the Atten > Attenuation = Adaptive
in the Attenuation section for more information on
compensating for External loss or gain.
Triggering
If the UE is making a call to the BSE, or the UE is in test mode but synchronized to the BSE frame then the
Internal Trigger is the preferred trigger source. External Trigger can be used if the UE is in test mode and
the UE provides a frame trigger. Free Run is not recommended for any bursted measurements or
measurements requiring demodulation.
For LTE measurements requiring demodulation, any one subframe can be selected for measurement using
the Target Subframe setting in the UL Config menu.
For LTE measurements not requiring demodulation and for general purpose measurements, only the first
subframe following a trigger is measured. These measurements also assume that the trigger falls on a
subframe boundary. If there is a need to measure a different subframe, then the Trigger Delay should be
advanced to the required subframe boundary. For example, if the signal to be measured is in subframe2,
the internal Trigger Delay should be set to 2 ms.
Measurements can be set to trigger in single or continuous (Cont) mode. When Single is selected, each
key-press initiates a single measurement.
Key Path:
Func Setup > Trigger
Preset:
Trigger Source
Internal and External Trigger Slope
Internal and External Trigger Delay State
Internal and External Trigger Delay Value
Internal
Positive
Off
0 us
Notes:
Trigger status is displayed at the bottom of the PXT screen.
Averaging
Key Path:
Meas Setup > Average Mode
Selecting Repeat means that averaging will restart each time the averaging count completes.