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

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Agilent Technologies E8285A manual Burst Time, Queries the Cdma gated power burst time