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To automatically set the reference level
1
Tap Menu > Amp/Scale.
2
Tap Auto Scale.
Each time you tap, the Y-axis scale changes to be optimized with some margin.
To manually set the reference level
1
Tap Menu > Amp/Scale.
2
Set the maximum reference value on the Y-axis:
a
b
To change the scale unit (optional)
1
Select Menu > Amp/Scale > Scale Unit.
2
Select the unit of the display scale from: dBm, dBV, dBmV, dBmV, dBµV, V, or
W.
The scale unit on the screen changes accordingly.
Setting scale per division
You can use the Scale Division feature to change the scale per division, representing
the value of one division on the horizontal scale. The default setting is 10 dB per division
and the maximum value can be set up to 20 dB.
To set scale per division.
1
Tap Menu > Amp/Scale > Scale Division.
2
Enter a value between 1 and 20 by using the on-screen keyboard and tap Apply.
Setting external offset
You can turn the External Offset on and manually set the external offset value. An offset
consists of a cable loss and a user offset, and the measurement result shows the value
reflecting both offset values. When the external offset value is set at 40 dB, the
measurement result compensates 40 dB.
1
Tap External Offset Mode to On under Amp/Scale.
2
Tap External Offset.
3
Enter a value by using the on-screen keyboard and tap Apply.
4
To turn the external offset off, tap External Offset Mode to Off.
April 2021
Tap Reference Level.
Enter a value using the on-screen keyboard and tap Apply.
SPA06MA-O User's Guide
22145360, R005
Chapter 10 Using RFoCPRI Analyzer
Configuring test parameters
Page 357
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