![rigol dsa815 video rigol dsa815 video](https://www.embedded.com/wp-content/uploads/media-1297704-jg25-f1-c-t.jpg)
Something else is being changed when you select Video averaging for the noise level to actually drop, and that something is not being changed back to what it was when you re-select Clear/Write. Remember, all I did was turn on the unit, put in a signal at 100 MHz -10 dBm, and change the trace type from Clear/Write to Video Avg and back again. Now note the trace did NOT go back to the original type of trace, and that the noise level did not return to the same level, and that the noise still seems to have some sort of averaging going on. Rigol DSA815 FW v00.01.09.00.07.zip (1194.22 kB - downloaded 212 times.
RIGOL DSA815 VIDEO GENERATOR
In addition, Rigol offers great options including an EMI filter and quasi-peak detector kit, VSWR measurement package, and tracking generator ('-TG' version) for all of these models. The DSA832, DSA832E, and DSA875 have a DANL (displayed average noise level) down to -161 dBm (typical). Now simply change back to the original trace setting - Clear/Write. The DSA815 distinguishes between signals with a frequency difference as little as 10 Hz. Also note now the signal level is incorrect, it now shows -21 dBm. Note that the noise level goes down from ~-65 dBm to ~ -75 dBm at the start, and the noise level is averaged (as it should be). Go to Trace/PF button and select Trace Type > Video Avg. Note in the first pic that I have a marker on the signal and have a display line set to the noise level at the beginning of the trace. Input a -10 dBm signal 100 MHz for tracking. Start the unit and use the preset scan and settings.