Measuring Edge - Agilent Technologies EPM-P Series Programming Manual

Power Meter Remote Operation
Making Measurements on Wireless Communication Standards

Measuring EDGE

Enhanced Data for Global Evolution or Enhanced Data for GSM Evolution
is an enhancement of the GSM standard. The modulation scheme is 8PSK.
As Edge does not have constant amplitude GMSK modulation like GSM,
peak-to-average ratio may be of interest.
The following procedure shows you how to measure the average power in a
GSM RF burst. Triggering is achieved using the rising edge of the burst.
The 'useful' part of the GSM burst lasts for 542.8 μs with a rise time of
28 μs. Also, trigger hysteresis is included to prevent small power
transitions during the burst causing re-triggering. As the power meter
triggers during the rising power transition, the measurement gate is
configured to measure the average power in a 520 μs period, 20 μs after
triggering. The display is configured to show the peak and
peak-to-average results in the lower window in numeric format while the
upper window shows the power trace starting 40 μs before the trigger.
Note The E9321A and E9325A sensors are best suited as they have the
optimum dynamic range and low-level stability in the 300 kHz
bandwidth.
*CLS
*RST
:SYST:ERR? <read string>
SERV:SENS:TYPE?
SENS:FREQ:900MHZ
SENS:BW:VID:HIGH
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Clears error queue
Resets meter settings to their
default states
The system error query
should return "0: No Error"
The sensor type query
should return one of the
following:
E9321A|E9322A|E9323A|
E9325A|E9326A|E9327A
The EDGE setup is only
valid with these sensors
Sets the measurement
frequency to 900 MHz
Only send this command if
using an E9321A or E9325A
EPM-P Series Power Meters Programming Guide