[linux-dvb] femon: wrong reported values

Federico Quagliata federico at quagliata.org
Thu Nov 30 13:13:57 CET 2006


José Oliver Segura wrote:
[...]
> Summary statistics:
> Frequency       Signal  Ber             Unc
> =========       ======  ========        ========
> 514000000       a151    00000000        00000001
> 570000000       96f9    00000000        00000000
> 794000000       8308    00000000        00000001
> 818000000       7539    00193640        00000fae
> 834000000       79b8    00044993        00000bd6
> 842000000       7b72    00004394        00000009
> 850000000       79ce    00051580        000023f1
> 858000000       7843    000694ee        00001d2b

Here are mine:

Summary statistics:
Frequency       Signal  Ber             Unc
=========       ======  ========        ========
810000000       6f45    bfdb3a22        a71f9949
186000000       6f45    bfc20ffd        aade4b46
698000000       6f45    bfa8a85b        a72329e2
762000000       6f45    bfa6cf8d        a986f5c0
730000000       6f45    bfc11469        aa175c36
626000000       6f45    bfca1dcf        a72229e2


As you can see they are very strange values... They can't be true as BER and
UNC are too high and signal doesn't change.

I tried femon and it complains about:

$ femon
FE: Zarlink ZL10353 DVB-T (DVBT)
Problem retrieving frontend information: Operation not supported
status  CVYL | signal 4e2e | snr c0c0 | ber 01000000 | unc 00000000 |
FE_HAS_LOCK
(...)

Ok, something here is not working at all...

I'm trying to hack with source code to see what operation is indeed "not
supported". Any hint?

> PS. Note that you need a recent tzap, since some versions (I think) do
> not fflush after writing to the output the status message, son the
> pipe to read from tzap won't work (I experienced this with a FC6
> installation, and I don't remember if tzap came from the installation
> of was yum-installed from some repository. I've just downloaded the
> latest dvb-apps and it works fine)

I use the latest hg ones.

Greetings,
Federico
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