Agilent Technologies EPM-P Series Programming Manual page 484

SYSTem Subsystem
SYSTem:PRESet <character_data>
EDGE
EDGE (Enhanced Data for Global Evolution or Enhanced Data for GSM
Evolution) is an enhancement of the GSM standard. Whereas the GSM
modulation scheme is GMSK which has constant amplitude, the EDGE
modulation scheme is 8PSK which has variable amplitude.
The EDGE set-up provides:
•
•
•
An EDGE measurement is started by detecting the rising edge of the
EDGE RF burst—for example the burst emitted by a mobile—using the
internal RF level trigger. The internal level trigger is set to –20dBm.
Trigger level hysteresis is used to prevent the power meter re-triggering
on the varying power levels within the EDGE burst. Time-gating is used
to measure the average power and the peak-to-average ratio in the useful
part of the RF burst.
The following table shows the power meter presets when
<character_data> is set to EDGE. Commands not listed are preset
according to their DEFault values (for further information refer to Table
11-1).
11-38
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Average power measurement in an EDGE burst.
Peak-to-average ratio in an EDGE burst.
A trace display of the burst profile
Agilent E4416A/E4417A Programming Guide