Title: SWR Mod not done ERROR
Post by: WD8BXS on 10. July 2018, 23:52:19
On a new build I am having the SWR mod not done error, I have moved the T3 winding and have verified paths to MCU. Diodes check OK, Still getting error.
Any ideas what else to look for??
Thanks,
Chuck WD8BXS |
Title: Re:SWR Mod not done ERROR
Post by: DF8OE on 11. July 2018, 07:27:03
Hi Chuck,
take a look here (https://github.com/df8oe/UHSDR/wiki/Recommended-Modifications#rf-04-n-012-rf-04-n-022-correct-unsymmetrical-adc-in-the-swr-measurement) ::)
vy 73
Andreas |
Title: Re:SWR Mod not done ERROR
Post by: DB4PLE on 11. July 2018, 09:31:43
Hi,
I think I remember we had such a discussion before in an older thread somewhere, but anyway: The SWR mod detection code measures certain voltage levels in the bridge. It seems in some cases the code wrongly detects the mod has been done, even without exchanged resistors due to measured voltages within the expected range.
But normally you also have to use different resistors, see Andreas link, it is not sufficient to just change the T3 connection. So if you replaced resistors and still getting this, check resistor values. If not, replace resistors.
73
Danilo |
Title: Re:SWR Mod not done ERROR
Post by: WD8BXS on 11. July 2018, 12:14:10
Thank yo so much for your replies, I will check it out tomorrow,
Thanks,
Chuck WD8BXS 73 |
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