Compiler/DS90UB954-Q1: FPD-Link III by COAX effect GPS signal

Hi Diamond,

Are you using a shield box for your system? Could you make sure to add copper tape to connect board ground and shield box, as well as make sure the opening in the box (where the cables come out) has enough copper tape to isolate the board.

Best,

Jiashow

Hi Jiashow

I have a shielding case on pcb and I had try copper tape to connect the cable and shielding case. But these ways are not efficient to avoid EMI radiation.

DIAMOND

Hi Jiashow

In my system, FPS-Link ||| by COAX connect to 953 and CMOS sensor the coax cable 3 meters long. So after making sure shielding case on pcb connect to GND and use copper tape connect to coax and GND, it seems cannot avoid EMI radiation from coax cable to effect GPS signal.

DIAMOND 

Hi Diamond,

Did you isolate where the interference is coming from (the box or the cable)? Have you tried to completely shield the box by covering any openings in the box with copper tape?

Hi DIamond,

Are you able to use an SSC? We have SSC spec listed in the datasheet.

Best,

Jiashow

Hi Jiashow

Yes, I had try shielding case、coax with additional shielding, it seems when FPD-Link ||| works and the radiation getting high. Does TI suggest any efficient way to solve EMI stopping effect GPS signal.

DIAMOND

Hi Jiashow

I had try SSC before, it seems cannot reduce EMI from FPD-Link |||. Does TI suggest any efficient way to solve EMI?

DIAMOND

Hi Diamond,

What were the SSC parameters?

Jiashow

Hi Jiashow

I'll try those that you mention.

DIAMOND