[linux-dvb] mantis branch on jusst.de - vp1034 can't tune to vertical channels

Gernot Pansy pansyg at gmx.at
Mon Oct 15 00:07:42 CEST 2007


On Sunday 14 October 2007 23:40:22 you wrote:
> Gernot Pansy wrote:
> > hmm, i see now there are other channels i can't tune to. like this one:
>
> You really have a signal ? The frequency also seems quite a bit high
> (although still in the spectrum) But the demodulator seems to think
> that there is no signal at all.

there have to be a signal, because i never had any troubles to tune to one of 
these channel with the vp1030 and vp1041. 

i have to verify, but it seems that these channels have all a low symbol rate.

notz

>
> Maybe too much attenuation at that frequency due to cable and or
> other larger capacitive reactance lumped, probably ? (in case such
> a frequency exists, wild guesses ....)
>
> Trying to guess why the demodulator thinks, no signal ...
>
>
> [ 1022.316000] mb86a16_set_fe: freq=2062 Mhz, symbrt=22000 Ksps
> [ 1022.316000] mb86a16_write: writing to [0x08],Reg[0x32],Data[0x02]
> [ 1022.316000] mb86a16_write: writing to [0x08],Reg[0x06],Data[0xdf]
> [ 1022.320000] mantis start feed & dma
> [ 1022.320000] mb86a16_write: writing to [0x08],Reg[0x0a],Data[0x3d]
>
> --- Snip ---
>
> [ 1022.416000] mb86a16_write: writing to [0x08],Reg[0x25],Data[0x01]
> [ 1022.416000] mb86a16_write: writing to [0x08],Reg[0x2b],Data[0xd4]
> [ 1022.416000] mb86a16_write: writing to [0x08],Reg[0x2c],Data[0x0f]
> [ 1022.416000] mb86a16_write: writing to [0x08],Reg[0x0c],Data[0x04]
> [ 1022.424000] mb86a16_set_fe: NO  -- SIGNAL
> [ 1022.424000] sync_chk: Status = 00,
>
>
> Manu





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