User`s guide

6 Using N8480 Series Power Sensors
152 N1913/1914A EPM Series Power Meters User’s Guide
N8480 Series Power Sensors (excluding Option CFT)
Power sensors have small errors in their response over frequency. The
response of each sensor is measured during manufacture (and during
periodic calibration). With N8480 Series power sensors (excluding Option
CFT), the resulting frequency compensation information is written into
EEPROM. This allows the frequency and calibration data to be downloaded
to the power meter automatically.
Using calibration factors enables you to achieve improved measurement
accuracy. This section describes making continuous wave measurements
using the N8480 Series power sensors (excluding Option CFT).
Making a measurement requires the following steps:
1 Zero and calibrate the power meter/sensor combination.
2 Set the frequency for the signal you want to measure.
3 Make the measurement.
Procedure
1 First, zero and calibrate the power meter/sensor combination.
2 Ensure the power sensor is disconnected from any signal source.Press
and the channel softkey. The Zeroing pop- up is displayed.
3 Connect the power sensor to the POWER REF output.Press and
the channel softkey to start the calibration routine. The Calibrating
pop- up is then displayed.
Zero
Cal
NOTE
You can reduce the steps required to carry out the zero and calibration procedure as
follows:
1 Connect the power sensor to the POWER REF output.
2 Press and . (For dual channel meters, press
, or as required).
Zero + Cal
Zero + Cal
Zero + Cal A
Zero + Cal B