Power Meter Remote Operation
Making Measurements on Wireless Communication Standards
EPM-P Series Power Meters Programming Guide
1-37
Measuring W-CDMA
The following procedure shows you how to make a continuous
measurement on a W-CDMA signal. Peak and peak-to-average power
measurements are made over a defined and statistically valid number of
samples. With gated 10 ms measurements, corresponding to 200,000
samples, there is less than a 0.01% probability that there are no peaks
above the measured peak value.The trigger is configured for continuous
triggering on a rising edge at -10 dBm. This results in continuously
updated results based on a 10 ms period relating to a position beyond
0.01% on the CCDF curve, responding to any changes in signal or DUT.
Note
The E9323A and E9327A sensors are best suited due to their 5 MHz
bandwidth. The E9321A, E9322A, E9325A, and E9326A sensors are
not recommended due to their lack of bandwidth (5 MHz required).
*CLS
Clears error queue
*RST
Resets meter settings to their
default states
:SYST:ERR? <read string>
The system error query
should return “0: No Error”
SERV:SENS:TYPE?
The sensor type query
should return one of the
following:
E9323A| E9327A
The W-CDMA setup is only
valid with these sensors
SENS:FREQ:1900MHZ
Sets the measurement
frequency to 1900 MHz
SENS:BW:VID:HIGH
Sets the sensor bandwidth
to high
SENS:SWE1:OFFS:TIME:0
Sets gate1 start point to the
trigger point
SENS:SWE1:TIME 10E-3
Sets gate time to 10 ms
INIT:CONT ON
Puts meter in “wait for
trigger” state
TRIG:SOUR INT
Selects internal trigger
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