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S:\agilent\e8285\REFGUIDE\MANUAL\fields.chp
Chapter 4, Description of Fields
Fields
See Also
“Measurement Triggering Process” in the Operating Overview chapter of the
E8285A User’s Guide
Disarm field description, on page 223
Screens Where Field is Present
CDMA CELLULAR MOBILE RECEIVER TEST
CDMA CELLULAR MOBILE TRANSMITTER TEST
CDMA GATED POWER
Attack Time
This field displays the time period between the -20 and -3 dB points of the rising
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:ATTack:TIME?”
queries the CDMA gated power attack 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 mobile station transmits eighth-rate data. The Test Set
analyzes an ensemble of gated-on periods, referred to as bursts with the number of
bursts controlled by the
"Averages" field on page 178.
The attack time represents the slope of the rising edge of the RF power, which 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 Attack Time field provides a convenient
way to observe or programmatically query the time period of the burst’s rising
edge.
Screens Where Field is Present
CDMA GATED POWER