7 Using U2000 Series USB Power Sensors
172 N1913A/1914A EPM Series Power Meters User’s Guide
Measurement Accuracy
Power sensors have small errors in their response over frequency. The
response of each sensor is measured during manufacture to determine
correction factors. With U2000 Series USB power sensors, correction
factors are stored in a 3 MB Flash memory and are downloaded to the
power meter automatically. Ensure that the USB power sensor is zeroed.
Calibration is not required as it is performed internally.
Using calibration factors enables improved measurement accuracy. This
section describes making average power measurements using the U2000
Series USB power sensors.
Making a measurement requires the following steps:
1 Zero the power meter/power sensor combination.
2 Set the frequency for the signal you want to measure.
3 Make the measurement.
Procedure
1 Zero the power meter/power sensor combination.
2 Ensure the power sensor is disconnected from any signal source.
3 Press and the channel softkey. Select the required channel.
Table 7 - 1 Power sensor connection requirements
Sensor Connection Requirements
U2000A
U2000H
U2001A
U2001H
U2002A
U2002H
U2004A
These power sensors connect directly to the POWER REF when
performing external zeroing.
U2000B
U2001B
These power sensors are configured with an attenuator. Do not
remove the attenuator when performing external zeroing.
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