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Channel mask works incorrect with xSDR@usb #45

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irodushka opened this issue Sep 17, 2024 · 0 comments
Open

Channel mask works incorrect with xSDR@usb #45

irodushka opened this issue Sep 17, 2024 · 0 comments
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@irodushka
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Conditions:

  1. xSDR on dev board (green V1)
  2. USB wiring
  3. Transmitting IQ file with usdr_dm_create (carrier 390M, modulation 1kHz, sr 1M)
    ./usdr_dm_create -t -r1e6 -c-1 -Y4 -E390e6 -e390e6 -I ./signal_1khz.ci16 -C<varies> -o
  4. Using different chmask (0b01, 0b10, 0b11) to test RF channels separation

Expecting:

  1. Transmission via ch#1 only when chmask == 0b01
  2. Transmission via ch#2 only when chmask == 0b10
  3. Transmission through ch#1 & ch#2 when chmask == 0b11

Result:

  1. When chmask == 0b01 or 0b10 - "good" transmission via ch#1 & ch#2 (carrier + modulation)
  2. When chmask == 0b11 - "poor" transmission via ch#1 & ch#2 (carrier only, no modulation)
  3. Cannot achieve the situation when the channels work separately.
@irodushka irodushka added the bug Something isn't working label Sep 17, 2024
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@irodushka @sergforce