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Disable TX Lo #31

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Sergey-R5AU opened this issue Feb 27, 2023 · 2 comments
Open

Disable TX Lo #31

Sergey-R5AU opened this issue Feb 27, 2023 · 2 comments

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@Sergey-R5AU
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Hi André !
Thank you for nice programming!
Works fine CW, DIGI and SSB QSOs i did via QO-100
Could you modify your code with disabling TX LO of AD93XX within simplex mode ?
Othervise TX LO disturbing normal reception and plenty of carriers are visible especially on high frequencies , see attached pic
Thank you in advance !
screenshot1

@F1ATB
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F1ATB commented Feb 27, 2023

I have to investigate the feasibility as it takes time to set the parameters of the transmitter when you want to transmit. For the moment, I put the transmit gain to the minimum. It's why I don't understand why you have all these lines.

73
André

@Sergey-R5AU
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Sergey-R5AU commented Feb 27, 2023

Andre thank you for quick reply !
Well , as i mentioned that started visible with frequency above 500-600 mhz, were on 2m or 70cm practically this is not disturbing too much.
However i learned a 2 wayaround:
1 - disable TX LO during reception - simple simplex mode
2 - move TX frequency out of RX range (ex.: 1mhz or more below or up - aka "inverted SPLIT mode")

P.S. I am using Pluto and RPI4

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