NF FRA5097, Instruction Manual

Page: 76 / 192

4.1 Overview of measurement and processing
FRA5097 4-2
4.1 Overview of measurement and processing
This section describes the flow of data processing from measurement up to data display in the
FRA5097. (See
“Fig. 4-1 Flow diagram of measurement and processing”
.)
CH1
CH2
OSC
Measurement
Measurement mode
Weighting factor Calibration data
Equalizing
memory
Analysis
Analysis mode
Display
Display mode
(measurement
processing)
(Input
weighting)
(Self error
compensation)
(Error compensation
for measurement
system)
(Analysis
processing)
(Display in
graphs, etc.)
V1
V2
Buffer memory
Fig. 4-1 Flow diagram of measurement and processing
•
Measurement processing: This phase determines the connection of input terminals and of the
internal circuit. The measurement is done through DFT (discrete
Fourier transform).
•
Self error compensation: Self error compensation is made through the use of calibration data
obtained by calibration. Calibration can be done either at the time of
switching power supply on, or through the menu [Calib.].
•
Error compensation for measurement system:
The characteristics of various measurement equipment connected
externally to the FRA5097 are measured as measurement system
errors. The errors can be canceled at actual measurement (through
the equalizing capability).
•
Input weighting: The measurement data of CH1 and CH2, individually, can be weighed by
arbitrary individual factors of the range between 0 and 1.0E+6 through the
menu [Input][WEIGHTING FACTOR].
•
Buffer memory: The measured and error compensated data are stored in the temporary buffer
memory.
•
Analysis processing: Analysis is made for the measurement process from measurement through
error compensation phases, and the original measurement data are
converted to the data to be displayed.
•
Display processing: The analyzed data are displayed in the form of graphs in the LCD screen
according to the display format that has been set.
Data obtained in the sweep-mode measurement are once stored in the buffer memory while data
analysis and display are also being done. The data read out from the buffer memory can be used
for analysis and display format conversion without remeasurement.