Agilent Technologies E8285A manual Release Time, Queries the Cdma gated power release time

Models: E8285A

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Chapter 4, Description of Fields

Fields

Release Time

This field displays the time period between the -20 dB and -3 dB points of the falling edge of an ensemble average of CDMA RF bursts. This field will display a value only after a gated power measurement is made.

GPIB Example

“MEAS:GPOWer:RELease:TIME?”

queries the CDMA gated power release 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 is controlled by the "Averages" field on page 178.

The release time represents the slope of the falling edge of the RF power, which is required to conform to a transmission envelope “mask”. This mask is displayed on the CDMA Gated Power screen and shows graphically whether the burst is within the limits specified in test standards. The Release Time field provides a convenient way to observe or programmatically query the time period of the burst’s falling edge.

Screens Where Field is Present

CDMA GATED POWER

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Page 361
Image 361
Agilent Technologies E8285A manual Release Time, Queries the Cdma gated power release time