VARA Speed Change Observation


Tony
 

Andy:

It's interesting to see how Vara's net data rate changes under certain conditions. If you take a look at the video below at 1 minute 15 seconds into the clip, you'll see the modem skip from level 1 to 3, 5, 7 and eventually settle on level 8 @ 2893 bps. The modem indicates speed in bps instead of level number so you have to reference the chart below to see how the levels progress. 

Video: https://www.youtube.com/watch?v=3rivvZjgD3s

As you can see, it didn't reach top speed i.e., level 11 @ 6782 bps despite the excellent SNR which shows how ionospheric path delays and other distortion components take their toll regardless of how strong the signal is.

Tony -K2MO 

Levels

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