[linux-dvb] [PATCH] HD5000 Support

Mac Michaels wmichaels1 at earthlink.net
Tue Oct 18 00:00:58 CEST 2005


Here is a patch:

Index: linux/drivers/media/dvb/frontends/lgdt330x.c
===================================================================
RCS 
file: /cvs/linuxtv/dvb-kernel/linux/drivers/media/dvb/frontends/lgdt330x.c,v
retrieving revision 1.11
diff -u -b -B -r1.11 lgdt330x.c
--- linux/drivers/media/dvb/frontends/lgdt330x.c	15 Oct 2005 
17:48:57 -0000	1.11
+++ linux/drivers/media/dvb/frontends/lgdt330x.c	17 Oct 2005 
21:52:37 -0000
@@ -772,9 +772,8 @@
 		.frequency_min= 54000000,
 		.frequency_max= 858000000,
 		.frequency_stepsize= 62500,
-		/* Symbol rate is for all VSB modes need to check QAM */
-		.symbol_rate_min    = 10762000,
-		.symbol_rate_max    = 10762000,
+		.symbol_rate_min    = 5056941,	/* QAM 64 */
+		.symbol_rate_max    = 10762000,	/* VSB 8  */
 		.caps = FE_CAN_QAM_64 | FE_CAN_QAM_256 | FE_CAN_8VSB
 	},
 	.init                 = lgdt330x_init,

-- Mac

On Monday 17 October 2005 09:00 am, Steve Malenfant wrote:
> Quick question, why is the symbol rate for the lgdt330x
> is : .symbol_rate_min = 10762000,
> .symbol_rate_max = 10762000,
>
> Shouldn't this be :
> .symbol_rate_min = 5056941, (QAM_64)
> .symbol_rate_max = 10762000, (VSB_8)
>
> I didn't know that VSB_8 was using half the bandwidth of
> the symbol, I need to look into this.
>
> Steve M.



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