R&S N 8000 Series System Manual page 156

Optimizing the shoulder distance
1. First use the the Curve Data Amplitude Read and Curve Data Phase Read buttons in
the Nonlinear control panel to read off the characteristics currently set in the precorrec-
tor.
The characteristics are displayed in the display part of the graphic.
2. Go to the FreqCorrection control panel.
The characteristics can be seen in the graphic.
3. In the precorrector graphical user interface, switch Correction to ON and also activate
Correction Point 1, Amplitude Slope Point 1 and Phase Slope Point 1. Set Position
Point 1 to 5%.
Fig. 5 The FreqCorrection user interface with an onset point at 5%
4. Now minimize the shoulder distance to left and right of the signal range by alternately
setting the amplitude and phase regulators with the aid of the slopes of point 1.
5. Go back to the Nonlinear control panel.
6. If necessary optimize the characteristic.
7. Keep repeating steps 2, 3, 4 and 6 until the shoulder distance to left and right of the sig-
nal range reaches the required value between 37 dB and 40 dB.
If necessary you must to some extent suppress the frequency dependent non-linearity in
the upper level range.
2098.0188.72
Chapter 4
- 4.38 -
Commissioning
E-1