[linux-dvb] Broadlogic vs (my) Nexus-S (1-0, :-( )

[Alessandro De Donno <alessandro.dedonno@unile.it>]

Hello ML,

These are the parameters of Broadlogic I'm using (tuning):

    Signal Strength 53 %
    Signal [Lock]
    Data [Lock]
    Viterbi Rate 3 / 4
    Satellite Frequency 12.5582 GHz
    L Band Frequency 1.9582 GHz
    Symbol Rate 27500 KSym/s
    Polarization Vertical / Right
    22 KHz Switch On - High LNB

    Current LNB Settings
    High Frequency 10.6000
    Low Frequency 9.7500
    
    (PID XYZ, with UDP multicast packets)
    
That's OK: Low Band Freq = Sat Freq - High Freq.
Now I try to tune my Nexus with dvbtune (CVS drivers of today):

    # ./dvbtune -f 12558200 -p V -tone 1 -s 27500 -n XYZ
    Using DVB card "STV0299/TSA5059/SL1935 based"
    tuning DVB-S to L-Band:1073908504, Pol:V Srate=27500000, 22kHz=on
    polling....
    Getting frontend event
    FE_STATUS: FE_HAS_CARRIER
    polling....
    Getting frontend event
    FE_STATUS:
    polling....
    Getting frontend event
    FE_STATUS: FE_HAS_SIGNAL FE_HAS_CARRIER
    polling....
    Getting frontend event
    FE_STATUS:
    polling....
    Getting frontend event
    FE_STATUS: FE_HAS_SIGNAL FE_HAS_CARRIER
    polling....
    Getting frontend event
    FE_STATUS:
    polling....
    Getting frontend event
    FE_STATUS: FE_HAS_SIGNAL FE_TIMEDOUT
    Not able to lock to the signal on the given frequency

Monitoring:

    # ./dvbtune -f 12558200 -p V -tone 1 -s 27500 -n 5636 -m
    Signal=0, Verror=65416, SNR=27378dB, BlockErrors=0, ()
    Signal=0, Verror=65464, SNR=27126dB, BlockErrors=0, ()
    Signal=0, Verror=65464, SNR=27186dB, BlockErrors=0, ()
    Signal=0, Verror=65464, SNR=27336dB, BlockErrors=0, ()
    Signal=0, Verror=65464, SNR=27384dB, BlockErrors=0, ()
    Signal=0, Verror=65464, SNR=27339dB, BlockErrors=0, ()
    Signal=0, Verror=65464, SNR=27549dB, BlockErrors=0, ()
    Signal=0, Verror=65472, SNR=27435dB, BlockErrors=0, ()

And now some questions:

1) why L-Band:1073908504?
2) why FE_TIMEDOUT?
3) which are the differences between AV7110 and AV7111?
4) sometimes dvbtune says me: "value too large" and sometimes it works
(at this frequency, 12558200 KHz). why?
5) why firmware loaded every time? is it located in a ram instead of a
flash-rom?
6) why "scan" utility creates - every time - different channels.conf
(BTW, all channels have "inversion off")?

TIA,
A.


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