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Hi Harald,
I have no Funcube, but from the design of it I would rather assume, that it is a matter of strong signal immunity. The WBX has a lot of built in analog filters whereas the Funcube has none. If several other carriers are in the vicinity (within several MHz of the targeted signal), all these add to noise in the channel.
You might try a filter between antenna and Funcube or try to use an antenna that is only sensitive in a small part of the Tetra band. Do not use one of these DVB-T mini antennas that come with the USB sticks. These are optimized for covering the whole TV band. This includes Tetra but also everyting else :/
Just my .02 - and speculation as well...
Best regards, Christian
On 25.05.2011 08:57, Harald Welte wrote:
Hi!
I've borrowed a Funcube Dongle Pro and tried to use it with osmocom-tetra. I've manually tuned it to a tetra carrier using the Qt-GUI, and it I can see the carrier very clearly in the spectrum/fft. However, I'm getting many more bit errors than with a USRP2+WBX board. Also, I have the feeling that the WBX has a much higher sensitivity, even with the FCDP input LNA at 30dB maxed out.
Can anyone confirm these findings?
I'll do some more investigation and report back here.
Regards, Harald
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