[linux-dvb] Tuner sensitivity - details not on linux dvb wiki?

Thomas Pinz - DC2RPT dc2rpt at gmx.de
Sun Mar 4 11:50:48 CET 2007


Hi Viktor, 

On Sunday 04 March 2007 08:53, Viktor Avramov wrote:
> Despite the thoroughness of the wiki I have not been able to find
> information on the tuning performance of the various devices supported by
> linux DVB.
Doing a performance tests is sadly not an easy task. In general, the 
sensitivity of an receiver not the only parameter which decides if the whole 
performance is good or not. In case of terrestrial receiption there are some 
other influences on the signal and these made the task for the receiver also 
not so easy. The signal usually contains also fading effects, co-channel and 
adjacent channel interferers, all of noise influences and local generated 
distortions by your PC.
And some devices are good with the one influences, others are good with other 
reception conditions. 

So if someone would test some receivers on this antenna this would represent 
only this signal condition, if yours is different, the whole ranklist could 
be different. 

But to test the devices completely with the usual influences, you need some 
expensive signal generators and a lot of time. So i never seen a test in a 
magazine where this had been done completely. If you are interested in such 
tests, with the keywords "NORDIG" (or "MBRAI") you will find some measurement 
standards on the net. 

In my personal experience, the differences between the devices are most time 
very small and i could not recommend a device which is better than all 
others.

Kind regards, 

Thomas Pinz



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