7 Using U2000 Series USB Power Sensors
176 N1913A/1914A EPM Series Power Meters User’s Guide
Procedure
Set the range as follows:
1 Press
. On dual channel meters, select the required channel.
2 The Range: setting field will be selected. Press to display the
Range pop- up.
3 Use the and keys to select the required setting.
4 Press to complete the entry.
Measurement Considerations
While autoranging is a good starting point, it is not ideal for all
measurements. Signal conditions such as crest factor or duty cycle may
cause the power meter to select a range which is not the optimum
configuration for your specific measurement needs. Signals with average
power levels close to the range switch point require you to consider your
needs for measurement accuracy and speed. For example, using an
U2000/1/4A sensor, where the range switch point is –10 ± 1 dBm in a
pulsed signal configured as follows:
The calculated average power is –12 dBm.
Characteristic Value
Peak Amplitude –6 dBm
Duty Cycle 25%
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