31 Jan
2014
31 Jan
'14
11:25 a.m.
Hi,
GSM doesn't hope _inside_ a channel, it hops between channels.
And the main channel "C0" that contains the FCCH bursts that kalibrate
locks to, doesn't hop at all, it's required by spec to be a continuous
carrier.
OTOH, the OP said he was in the US and used EGSM band option ... huh
... I thought the US was GSM-800 ?!?
Cheers,
Sylvain
GSM does not
hop around inside its channel, this is wrong, the frequency
is +- some Hz accurate, at least in normal western European commercial GSM
networks.
Are you sure about that? Check it out:
https://svn.berlin.ccc.de/projects/airprobe/wiki/A
Legend of first picture. If still in doubt that *most" GSM carriers are
hoppers, use rtl_power to scan your region ;-)