Re: HD-3000 has wrong tuner type
- Date: Thu, 06 Apr 2006 22:19:20 -0400
- From: Gene Heskett <gene.heskett@xxxxxxxxxxx>
- Subject: Re: HD-3000 has wrong tuner type
On Thursday 06 April 2006 21:37, Trent Piepho wrote:
>The pcHDTV HD-3000 is configured to have a Thomson DTT7610 tuner, but
> this is wrong, at least for my card.
>
>The tuner has a sticker on the side that says DTT 7612. I opened the
> can up, and the PCB has printed on it "PCB DTT 7611X". The chips are
> an Infineon TUA6030 and a Philips TDA9887TS.
>
>The configurations for the DTT7610 and DT761X (X = 1..5) tuners are
> nearly the same, the difference is the band switch points. The 7610
> switches to the mid band at 157.25 MHz vs 145.25 MHz, and to high
> band at 454 vs 415.25 MHz.
>
>I checked cable channels 19, 20 and 62, which are right on the band
> switch points. With the DTT7610 tuner, they come in poorly (19) or
> not at all (20 & 62). With the DTT761x tuner, they work fine.
>
>So, it's clear that my HD-3000 has a 761X tuner, and that this makes a
>difference. What I'm wondering is if there are different revisions of
> the HD-3000, and older ones had a different tuner. How did the
> person who decided to use DTT76110 come to that conclusion?
>
>I don't have a DTT761X datasheet, but I do have a TUA6030 datasheet.
> Their recommended band limits are much less, 127.25 MHz and 361.25
> MHz. Did the DTT761x limits come from someone with a data sheet, or
> are they just a guess?
There apparently are different versions of that puppy, from my logs:
-----------------------
Apr 2 17:13:04 coyote kernel: TV tuner 52 at 0x1fe, Radio tuner -1 at
0x1fe
Apr 2 17:13:04 coyote kernel: i2c-algo-bit.o: cx88[0] passed test.
Apr 2 17:13:04 coyote kernel: tuner 2-0061: chip found @ 0xc2 (cx88[0])
Apr 2 17:13:04 coyote kernel: tuner 2-0061: type set to 52 (Thomson DTT
7610 (ATSC/NTSC))
----------------------------------
Unforch I cannot check the channels as you have as my only feed is from
a sat rx, and it does all the channel changing, with me stuck on the
ubitiquous channel 3 forever.
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Cheers, Gene
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