ST25RU3993HPEV - suddenly not detecting tag

spp.1 · ‎2022-06-01

I have been using the ST25RU3993HPEV board for the Tag detection. Earlier the board is performing well and it was detecting tag. But suddenly reader is not detecting tag.

Is there any chance for power amplifier regulator has gone bad?

If the tag is kept on the surface of the antenna, it will be detected at some point.

Bart Herse · ‎2022-09-26

Dear SPP.1

is the supply voltage for the power amplifier still present? --> check voltage between pin 1 and 2 on J21. Note to switch on the RF before doing the this measurement.

Is the HPEV reader still able to detect tags, when switching to the internal power amplifier?

Cheers,

B

View solution in original post

Bart Herse · ‎2022-09-26

Dear SPP.1

is the supply voltage for the power amplifier still present? --> check voltage between pin 1 and 2 on J21. Note to switch on the RF before doing the this measurement.

Is the HPEV reader still able to detect tags, when switching to the internal power amplifier?

Cheers,

B