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TOPIC: reflected power protection at low power levels

reflected power protection at low power levels 22 Apr 2023 19:02 #1

  • tomas
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Hi,
is there any way to disable the power back-off when SWR is high on lower power levels ~10-20W from the SunSDR?
The problem I have is when using an automatic ATU (LDG), the SunSDR regulates output power after SWR and the ATU dont get a steady input power to its job. Problems solve by a 3dB attenuator between the units in TX mode, but gets a bit complicated to switch in and out.
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reflected power protection at low power levels 23 Apr 2023 02:44 #2

  • VK6NX
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As far as I know, there is no function to disable high SWR protection.

SS2 DX is more tolerant to hight SWR, when power output is set to 10W of below - it will take longer for high SWR protection to kick off on that power level.

Hence, to get it working, the connected ATU should be capable to funtion on max 10W carrier.
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reflected power protection at low power levels 23 Apr 2023 07:10 #3

  • tomas
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Thanks for the reply!
Well it seems that this combo needs very stable 10W to work, and on my DX it is not working 100% when there is no isolation/improved SWR.

Ill try to write this up on github as wanted feature, like a progresiv SWR protection vs power.
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