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S:\agilent\e8285\REFGUIDE\MANUAL\fields.chp
Chapter 4, Description of Fields
Fields
Burst Time
This field displays the time period between the -3 dB points of the trace
representing the average power during an ensemble of CDMA RF bursts. This
field will display a value only after a gated power measurement is made.
GPIB Example
“MEAS:GPOWer:BURSt:TIME?”
queries the CDMA gated power burst time.
Operating Considerations
When a mobile station is operating in variable data rate transmission mode, the
RF power is gated on during randomized 1.25 ms periods. During a CDMA Gated
Power measurement the Test Set analyzes an ensemble of gated-on periods,
referred to as bursts. The number of bursts used for the measurement is defined by
the
"Averages" field on page 178. The burst time field displays the time period
between the rising and falling edges of the burst.
Each burst is required to conform to a transmission envelope mask. This mask is
displayed as a graph on the CDMA Gated Power screen and shows whether the
burst is within the limits specified in test standards. The middle portion of the
display is time-compressed to allow the Test Set to display the entire burst without
compromising resolution during the rising and falling edges. The Burst Time field
provides a convenient way to observe or programmatically query the time period
of the burst between rising and falling edges.
Screens Where Field is Present
CDMA GATED POWER