Making Measurements On Wireless Communication Standards - Agilent Technologies EPM-P Series Programming Manual

Power Meter Remote Operation

Making Measurements on Wireless Communication Standards

Making Measurements on Wireless Communication
Standards
The following sections describe typical measurements you may want to
make. They are also described, for front panel operation, in the User's
Guide.
Measuring GSM
The following 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 542.8μs with a rise time of 28μs. 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 trigger is configured for the a power
level of -20 dBm on a rising edge. A trigger hold off is also setup for
4275 μs, disabling the trigger for 7.5 GSM time slots, ensuring the same
time slot is measured at the next GSM frame. The single numeric window
is configured to display the average power in gate 1. The trace window is
configured to show the RF burst from 20 μs ahead of the trigger for a
duration of 700 μs.
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?
1-24
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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 GSM setup is only valid
with these sensors
EPM-P Series Power Meters Programming Guide