While trying to calibrate an EN 61000-4-6 CDN Setup using a Siglent SSA 3032X. The Calibration always results in a “TG: received power to high”

Info: Starting calibration 17 points -40,00 dBm  
1/17 Freq: 150 000Hz  TG: received power too high, set TG=-20
2/17 Freq: 225 000Hz  TG: received power too high, set TG=-20
3/17 Freq: 337 500Hz  TG: received power too high, set TG=-20
4/17 Freq: 506 250Hz  TG: received power too high, set TG=-20
5/17 Freq: 759 375Hz  TG: received power too high, set TG=-20
6/17 Freq: 1 139 063Hz  TG: received power too high, set TG=-20
7/17 Freq: 1 708 595Hz  TG: received power too high, set TG=-20
8/17 Freq: 2 562 893Hz  TG: received power too high, set TG=-20
9/17 Freq: 3 844 340Hz  TG: received power too high, set TG=-20
10/17 Freq: 5 766 510Hz  TG: received power too high, set TG=-20
11/17 Freq: 8 649 765Hz  TG: received power too high, set TG=-20
12/17 Freq: 12 974 648Hz  TG: received power too high, set TG=-20
13/17 Freq: 19 461 972Hz  TG: received power too high, set TG=-20
14/17 Freq: 29 192 958Hz  TG: received power too high, set TG=-20
15/17 Freq: 43 789 437Hz  TG: received power too high, set TG=-20
16/17 Freq: 65 684 156Hz  TG: received power too high, set TG=-20
17/17 Freq: 80 000 000Hz  TG: received power too high, set TG=-20
Error: Calibration done, errors occured

I can see however on the spectrum analyzer that the RX Signal is at -50dBm.

The calibration level is set to -40dBm. Changin this Value doesn’t change anything at all. What am I doing wrong?