I switched back to AMPT now the Scale Type is grayed out. See bmp screen dumps from Rigol I just tried the reverse I, put the unit to LOG mode, then Normalized the cable. For the normalization it seems to be disabled in linear mode, I have toggled LIN/LOG 'Scale Type' (under AMPT) and the Normalize option becomes grayed out. ) I have not seen anything about Normalization, or low end non-linearity. (I miss my Advantest R3131A, the TG dies after 10 minutes. I am having two different issues with the Rigol.

Version of Main Board:00.09 Version of Radio Frequency Board FPGA:00.05 Version of Digital Board FPGA:00.05 Version of Firmware:00.01.18 Version of Boot:00.01.04 And btw, how can I submit a ticket to Rigol? Thanks, Christos Has anyone else seen this or is it just my unit?. The screenshots attached are from that setup, DG1022Z transmitting into DSA815-TG and the problem is still there so it was not the HF transmitter. When feeding the instrument with a signal at exactly 14.3 MHz, then the observed phase noise gets beyond the instrument's advertized limits, for that see the attached image 504.png To verify the problem, I replaced the HF transmitter with a lab signal generator, the DG1022Z. Specifically, when a signal is fed to the instrument, in the area around 14.3 MHz eg 14.25 MHz or 14.35 MHz, appart from the original signal there is also displayed another signal (mixing product?), for that see attached images 501/2/3/5/6/7. When using the DSA815-TG to get a spectrum output from a HF transmitter, seen a strange spurious signal in the area of 14.3 MHz. Quote from: sv1eia on September 23, 2017, 01:30:13 pm Hi, Got a strange problem with the DSA815 and would like to see if anyone else is observing it. Hi, Got a strange problem with the DSA815 and would like to see if anyone else is observing it. I hope this post helps answer some of the sought after questions regarding the *new* DSA815-TG w/ 1.18 Firmware. Of course I also still have functioning the 10Hz RBW that came activated from the factory with the 1.18 Firmware. So I will definitively state that the *never_ending_trial_time_mod* does indeed still work with the *new* 1.18 Firmware and ver. Each time I reboot the SAME 13hrs 9mins xxseconds is restored. I now have 13hrs 9mins xxseconds remaining forever. Switching on the switch effectively shorts together Pin7 and Pin8. I did NOT *lift-up* Pin7 when I connected the *jumper wires*, it remained soldered to the pcb. I have access to the switch from outside of the unit with a toothpick, in case I need to run updates, etc. At the suggestion from CombatWombat71, I went ahead and opened the DSA and ran two thin jumper wires, one from Pin7 and the other from Pin8 on the ICU1105 to a small slide switch mounted on the RF-shield. I was beginning to get desperate because my *Trial Time* was about to run out. So I am using 1.18 Firmware and version 1.04 Boot. I have a *new* DSA815-TG which was purchased the end of last year, 2016. Good day All: OK, figure I'd post my latest finding regarding the *never_ending_trial_time_mod* with a FRAM Write Protect Switch.

Rigol dsa815 tg spectrum analyzer