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LR1120DVK1TGKS basically no range #351

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knuthcomi opened this issue May 8, 2024 · 2 comments
Open

LR1120DVK1TGKS basically no range #351

knuthcomi opened this issue May 8, 2024 · 2 comments

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@knuthcomi
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knuthcomi commented May 8, 2024

Having 2x LR1120DVK1TGKS with nucleo boards with default ping-pong build example. The maximum range I could get is around 10meters.
Both boards have been updated to lates 0201 firmware for lr1120
Not sure whats happening. It can be something to do with RF switch on the board. Not sure where to start the debugging.
I did measure RW switch control pins. And they seem to do the correct thing. V1 HIGH (switch RF to J2) while receiving. V2, HIGH ( switch RF to J1) while transmitting
What else to check? They out of the box development boards, examples should also work.
Thanks!

@gc9n
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gc9n commented May 17, 2024

check frequency ...

@knuthcomi
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check frequency ...
Connected the dev kit to spectrum analyzer. Its exactly on 490mhz as it has to be. But only outputing 10uW. Althrought it has been set up to 13dbm. Also tried to measure before the antenna switch. The result was similar, around 10-20uW
436620810_971127681119684_2620579883635938379_n
Kuvatõmmis 2024-05-18 152700

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