status of bug 1024

[joerg]

Am Di  25. März 2008 schrieb Sean Chiang:
> HI!
> 
> I'm trying to clarify the T-mobile oscillation issue. my testing result 
> so far:
> 
> Graeme's neo + T-mobile pre-paid sim --> 18 times re-camping to network 
> in 10 minutes
> My neo's     + T-mobile pre-paid sim --> 17 times re-camping to network 
> in 15 hours
> 
> These two neos have the same kernel, uboot, rootfs, gsm firmware, IMEI, 
> and tested at the same location.
> I don't think this problem comes from gsm firmware side, there might be 
> something wrong at gsm module.
> I'm not sure which part exactly. So I'll keep digging with TI( :-( :-( 
> :-( ) and try to figure out if our gsm module
> is really broken, how to find them in factory.

Hi Sean,
check for RF-emission spectrum/amplitude of both NEOs. To make sure there's 
not a spike harmonic interfering with the exact GSM control channel 
frequency. Some PPM offset of any clock in the other NEO may shift such a 
spike out of "danger zone". Dependency regarding different provider's cards 
is via the channels used by the specific provider, even when both are e.g. 
850MHz, their channels (and thus exact frequencies) are different for any 
given location.

Another idea to check for is bad connection of GSM antenna in one of the NEOs.

cheers
jOERG