Tx waterfall issue with V1.4

  • 1
  • Problem
  • Updated 4 years ago
  • Solved

When using the AUTO setting for the waterfall BLACK level, on transmit the waterfall is way too dark.  Likewise, if I manually set the level, the waterfall is either too bright (and washed out) on rx when set for a good transmit setting, or too dark on tx when properly set for rx. 

It seemed to be properly balanced in V1.38 and prior. 



Photo of K2CB Eric Dobrowansky

K2CB Eric Dobrowansky

  • 232 Posts
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Posted 4 years ago

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Photo of Steve - N5AC

Steve - N5AC, VP Engineering / CTO

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Official Response
This has been fixed and will be released in the next version of SmartSDR (#1773).  The FLEX-6000 has about 45dB internal isolation when using the same antenna to TX/RX and greater than 90dB when using a receive antenna (RXA, RXB, XVTR).  To make is easier to see variations in the waterfall during transmit, a variable amount of attenuation will be applied to the waterfall based on the antenna used to monitor the transmit signal.  Since much more attenuation is applied when using one of the transmit antenna ports, you will generally be able to only see your signal in the waterfall.  When using a receive antenna, you should be able to see other signals on the band in addition to your own.  Your mileage may vary based on coupling at your site between receive and transmit antennas.