NF FRA51602, Instruction Manual

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5.8 Automatic high density sweep
5
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FRA 51602
5.8 Automatic high density sweep
This function automatically increases the density of sweep measurement only in the vicinity of large
changes in measurement data. By increasing the measurement resolution only where necessary, accurate
results can be obtained in a short time.
This function compares the measurement value difference between adjacent measurement points |d
n
-d
n-1
|
(d
n
is the measurement data at frequency f
n
.) with the threshold value
[VARIATION]
. When exceeding the
threshold value, a new measurement point is inserted between f
n-1
and f
n
and a measurement is performed at
that new point. In this way, frequency density is increased automatically until measurement value
differences fall below the threshold. After the frequency f
n
, the sweep density returns to the normal value.
An example of an automatic high density sweep measurement of the resonance characteristic of a crystal
resonator is shown in
Figure 5-15
, where the black dots ( ● ) indicate the measurement data points. We can
see that the density of the frequency sweep is automatically made high only in the part where there is a
sudden change in the characteristic.
Figure 5-15 Example of measurement using the automatic high density sweep
The automatic high density sweep is set with
【
Sweep
】 –
[SLOW SWEEP] .
[SLOW SWEEP]
: This is set to ON to perform automatic high density sweeping. For normal
sweep measurement, this is set to OFF.
[CHANNEL]
: This sets the channel for monitoring sudden changes.
[TYPE]
: This sets the parameter to be monitored.
Frequency
|Z|