NF FRA5097, Instruction Manual

Page: 51 / 192

3.2 Display at power “ON” and initial settings
FRA5097 3-11
Calibration/Systemcheck
Calibrating . .
oooooooooo*************************************
FRA5097 System program Version *.**
Copyright 1989..2006 NF Corporation
The completion of calibration is indicated by the change of “*” marks into all “o” marks in the
“Calibration/systemcheck” window display, which means that the instrument is ready for
operation
The setting values and parameters just before the previous power-off are maintained, except that
the oscillator output is off and the measurement is inactive.
If any errors are detected during calibration processes, the word “ERROR” will be displayed in
red characters (see the arrow
→
the figure) in the “Calibration/systemcheck” window, and the
FRA5097 does not function/operate.
Calibration/Systemcheck
Calibrating . .
oooooooooo*************************************
ERROR : 50
･･････････････
FRA5097 System program Version *.**
Copyright 1989..2006 NF Corporation
The following are possible causes of calibration errors as mentioned above:
•
Effect of external noise
During calibration processes, measurement is made within the instrument by connecting the
oscillator output and the analyzer input internally. A calibration error could be caused if a
high level of external noise comes in at any time during the internal measurement. If the
calibration error exceeds a certain predetermined range (threshold), an error message will be
displayed and the instrument will be put in an unoperable status, since the measurement
accuracy cannot be maintained.
(Actions/measures to be taken)
・
Use the instrument in a low noise environment.
・
Switch on the power supply again after disconnecting a signal cable with BNC
connectors from the oscillator output and the analyzer input. This can isolate the
noise source if noise has been induced on the signal cable.
•
Failure of FRA5097
If calibration error is indicated even after the above measures, malfunction of the FRA5097
is suspected. Contact NF Electronics or its representative to arrange for repair.
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