Hi Edgar,
In PPM-mode it also looks at the frames that get transmitted. if that falls to 0, then the receiver will go into failsafe. Because of the design of the receiver that eliminates all the cables that usually exist between the power supply etc there is less likely going to be any interference. Also please go to the link on my website that refers to an article explaining the difference between PCM and PPM.
In respect to the average current drawn, that you can derive from the excel file I have not had the opportunity to prove it to the detail. but in general it will be fairly accurate. The data gets sampled even more often than every second. It is displayed in the NavView on the left in the list every second, but the display on the right has a resolution of 1 msec (millisecond or 1/1000). You can also have that transferred into a CSV-file.

Thanks,

Gerhard