SL1204 antenna problems

I am using SL1204 saretel antenna for sim18 gps module.Some times i am able to read valid data from the module and sometimes i am not able to read the data.

Please suggest me some tips for working the my gps module properly.



Umamahesh

how does it in anyform be antenna problem,if you are able to read data sometimes only then i would say check if you are operating it as proper voltage levels.

Regards

I checked voltage at antenaa it is showing 3.3v exactly what i expect.I tried with another antenna with SMA connector it is working fine.

Regards
Umamaheswara Rao Maddula