Re: [ivtv-devel] PVR-500MCE NTSC tuning

Sun, 06 Mar 2005 08:22:41 -0800

My tveeprom says the same thing that Jarod's does (I think it was his), except for the serial #.
tveeprom: Hauppauge: model = 23552, rev = D292, serial# = 7725799
tveeprom: tuner = Philips FQ1236A MK4 (idx = 92, type = 55)
tveeprom: tuner fmt = NTSC(M) (eeprom = 0x08, v4l2 = 0x00001000)
tveeprom: audio_processor = MSP3410D (type = 5)

The tuner model and rev number are written on the actual tuners on the card.

I don't Windows installed anywhere in the house, but I'll try plugging it in a friend's computer to see what comes up.

--Winston

On Mar 6, 2005, at 3:33 AM, Jason Knisley wrote:

This is all really strange. My test box with the
pvr-500 in it has been doing dual recordings for a
couple of days. I've just scheduled back to back junk
for it to record to check and it seems to be doing
fine with the things that I've told you about.

Have you installed Windows and WinTV2000? The about
dialog box describes the card characteristics,
including the tuners and model number. It might be
helpful to know if there's a new version of the PVR500
out now.

Jason

--- Winston Chang <[EMAIL PROTECTED]> wrote:

One more issue: my MythTV box doesn't seem to change
channels when
doing a scheduled recording (it uses the last
channel watched), but it
is capable of changing channels just fine with live
TV.  Strange...

--Winston


On Mar 6, 2005, at 2:21 AM, Winston Chang wrote:

I looked into my PVR-500MCE tuning problems a
little more and played
around with tuner.c to make my card tune properly.
It turns out that
the tuning wasn't just a bit off -- it was
approximately a whole 
channel off.

In tuner.c, I modified the last line of the
function
static void set_tv_freq(struct i2c_client *c,
unsigned int freq) 
from this:
      t->tv_freq(c,freq);
to this:
      t->tv_freq(c,freq + 104);

The "+ 104" is a correction factor I added to make
it tune to the
correct frequency. 104 * 1/16 MHz = 6.5MHz. In
other words, when I
tell the card to tune to a particular frequency,
it tunes 6.5MHz too 
low.

The hack is serving for now, but it's obviously
not a good solution.
Does anyone else have this problem? Any ideas
about why the tuning is 
offset?

--Winston

<messages.txt.gz>


On Mar 2, 2005, at 11:07 PM, Winston Chang wrote:

Well, my PVR-500MCE (NTSC) is working with 0.3.2f
+ Jarod's tuner
update patch. The only issue now is that the
tuning seems slightly 
off.

Suppose I tune into channel 10; 'ivtvctl -R'
tells me that this is
frequency 3096. It comes in black and white
until I push the
frequency up a little bit, like up to 3100 or so.
Then it looks 
great.  It's almost there!

--Winston





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