[linux-dvb] [PATCH] TT S2-3200: Support for high symbol rates.

Manu Abraham abraham.manu at gmail.com
Fri Nov 21 21:53:09 CET 2008


Igor M. Liplianin wrote:
> TT S2-3200: Support for high symbol rates.
> 
> From: Igor M. Liplianin <liplianin at me.by>
> 
> TT S2-3200: Support for high symbol rates.
> Successfully tested for 44948 kSym/s
> 
> Signed-off-by: Igor M. Liplianin <liplianin at me.by>
> 
> 
> ------------------------------------------------------------------------
> 
> # HG changeset patch
> # User Igor M. Liplianin <liplianin at me.by>
> # Date 1226180014 -7200
> # Node ID 1c4d63e589e0420d95d96bf81d3bfbb2cd39a9cf
> # Parent  54b128d638438037c7cb4417045c0d773c21d9e7
> TT S2-3200: Support for high symbol rates.
> 
> From: Igor M. Liplianin <liplianin at me.by>
> 
> TT S2-3200: Support for high symbol rates.
> Successfully tested for 44948 kSym/s
> 
> Signed-off-by: Igor M. Liplianin <liplianin at me.by>
> 
> diff -r 54b128d63843 -r 1c4d63e589e0 linux/drivers/media/dvb/ttpci/budget-ci.c
> --- a/linux/drivers/media/dvb/ttpci/budget-ci.c	Sun Nov 09 16:35:13 2008 +0200
> +++ b/linux/drivers/media/dvb/ttpci/budget-ci.c	Sat Nov 08 23:33:34 2008 +0200
> @@ -1321,7 +1321,7 @@
>  	.inversion		= IQ_SWAP_ON, /* 1 */
>  
>  	.lo_clk			= 76500000,
> -	.hi_clk			= 99000000,
> +	.hi_clk			= 135000000,
>  
>  	.esno_ave		= STB0899_DVBS2_ESNO_AVE,
>  	.esno_quant		= STB0899_DVBS2_ESNO_QUANT,


The STB0899 is never rated to run at 135MHz clock. Some older die cuts
would even cause clock race arounds at even 108MHz. The recommended
maximum clock is 99 MHz at maximum.

Is your STB0899 demodulator still functional, what inscriptions are
there on the demodulator ? I mean continuously running with this Clock
for a day or two at least .. ?

Regards,
Manu



More information about the linux-dvb mailing list