TESEO LIV3F no signal

ABouk.1 · ‎2025-02-17

Hello,

I have assembled a PCB that contains a TESEO LIV3F + LNA + SAW, this part of the schematics is shown below.

Using the teseo suite pro, the GPS receives no signal so I used a -9dB 1575MHz RF source on the input and measured the RF power at the output (GPS_RF_IN), the signal is well amplified and filtered but the LIV3F module cannot see a single satellite.

Any ideas pls ?

ABouk.1 · ‎2025-02-26

Hello,

After some days of hardware debugging, i found out that it was due to the fact that the decoupling capacitor on the LNA supply was too far, I just had to get it closer to the IC and everything was fine :)

View solution in original post

Franck_LMS · ‎2025-02-26

Hello,

What type of antenna are you using for GPS reception ?

Maybe it is an active one. It could explain why you have no reception.

ABouk.1 · ‎2025-02-26

Hello,

After some days of hardware debugging, i found out that it was due to the fact that the decoupling capacitor on the LNA supply was too far, I just had to get it closer to the IC and everything was fine :)