NF FRA5087, Instruction Manual

Page: 114 / 194

4.16 Calibration
FRA5087
4-40
4.16 Calibration
In calibration operations, the frequency characteristics of amplitude and phase of the FRA5087 are
automatically calibrated with reference to the internal oscillator. The calibration results are
stored in the internal memory and will be used as calibration data for measurements.
Use the menu [Calib.], open the window [CALIBRATION] and press the function key [START]
to start calibration operations. Calibration operations can be done only when the oscillator
output is “off” for both AC/DC.
Press the
AC/DC OFF key before starting calibration operations, to turn off the oscillator output.
When calibration operations start, the window “Calibration/Systemcheck” is displayed on the
LCD screen.
Calibration/Systemcheck
Calibrating . .
oooooooooo*************************************
FRA5087 System program
Version *.**
Copyright 1989..2006 NF Corporation
When all of “*” marks turn to “o” in the window “Calibration/Systemcheck”, calibration is
completed and the measurement system is ready for use.
The measurement accuracy specifications for the FRA5087 are based on the status of immediately
after calibration; therefore it is recommended that calibration operations are done immediately
before conducting measurements.