01-07-2022, 11:19 AM
I've opened the phone (mine is Mobian Edition 2/16GB) and did some experiments confirming that the modem antenna system is interfering with the microphone when the modem does work.
When I disconnected the antenna black cable the modem had no network signal. But I've successfully use the Wifi antenna cable from my laptop (had to opened it too) that I've connected to ANT_MAIN near the modem ( c2 as used here: https://forum.pine64.org/showthread.php?tid=15474 ).
So with the modem getting the signal using my laptop's Wifi antenna (instead of the phone's bottom antenna), the microphone worked great -- no "digital" noise whatsoever (voice calls or mobile data usage).
It doesn't seem to me to be an easy solution to fix this. There are some possibilities that I'm imaging:
- Pine64 to come up with another USB-C board and/or the plastic frame with printed antennas that doesn't affect the microphone.
- me to make a custom antenna and place it maybe between the battery and the back cover or on the side ...
- don't know... any ideas?
Until then, I'll continue to use the mic without boost (level at 0). The noises are gone, but the sound volume is very low and some people struggle hearing me.... Recording sounds is pretty useless like this too.
When I disconnected the antenna black cable the modem had no network signal. But I've successfully use the Wifi antenna cable from my laptop (had to opened it too) that I've connected to ANT_MAIN near the modem ( c2 as used here: https://forum.pine64.org/showthread.php?tid=15474 ).
So with the modem getting the signal using my laptop's Wifi antenna (instead of the phone's bottom antenna), the microphone worked great -- no "digital" noise whatsoever (voice calls or mobile data usage).
It doesn't seem to me to be an easy solution to fix this. There are some possibilities that I'm imaging:
- Pine64 to come up with another USB-C board and/or the plastic frame with printed antennas that doesn't affect the microphone.
- me to make a custom antenna and place it maybe between the battery and the back cover or on the side ...
- don't know... any ideas?
Until then, I'll continue to use the mic without boost (level at 0). The noises are gone, but the sound volume is very low and some people struggle hearing me.... Recording sounds is pretty useless like this too.
