Hi ,
We have a custom hardware with an Active GPS Antenna (that is connected to the main board with u.fl connector).
I ran the GPS SNR command to test the performance of our device and got the following:
AT%XRFTEST=2,1,0 %XRFTEST: -90,-22600 OK AT%XRFTEST=2,1,0 %XRFTEST: -100,-22400 OK AT%XRFTEST=2,1,0 %XRFTEST: -102,-22680 OK AT%XRFTEST=2,1,0 %XRFTEST: -94,-22680 OK AT%XRFTEST=2,1,0 %XRFTEST: -88,-22630 OK AT%XRFTEST=2,1,0 %XRFTEST: -91,-22380 OK AT%XRFTEST=2,1,0 %XRFTEST: -93,-22530 OK AT%XRFTEST=2,1,0 %XRFTEST: -92,-22700 OK AT%XRFTEST=2,1,0 %XRFTEST: -94,-22460 OK AT%XRFTEST=2,1,0 %XRFTEST: -78,-22630 OK AT%XRFTEST=2,1,0 %XRFTEST: -91,-22680 OK AT%XRFTEST=2,1,0 %XRFTEST: -96,-22300 OK AT%XRFTEST=2,1,0 %XRFTEST: -84,-22380
The SNR is negative for us instead of being a positive number as in the example on infocenter. and the Antenna_power is coming out to be -86 dB.
I am looking for a reference to get a sense of how good or bad these numbers are.
1. What is a good range vs. a bad range? These numbers are returned when testing in an indoor setting, does that matter?
2. Does this command only measure the signal upto the external LNA (built into the external antenna)? Because otherwise how does it know to turn the LNA/ Active Patch ON without AT%XCOEX0=1,1,1570,1580?
Regards
Noaman
