VARA Speed Change Observation



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. 


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 


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