dvd player messed up sound when playing through optical.
 

Hi again. I recently purchased the samsung hd upconverter and have
found a flaw in it. I returned the first one and got a new one and it
is still happening. My problem is that when i play a digital source
through the optical cord the sound gos through real quick pauses every
about five minutes or so. I know that it is not the receiver or
optical cord because i switched them and still same problem. My
question is, has anyone heard of this problem, and what can i do to
fix it if anything? Also would it be fine if i used a coax cord
instead of optical, (im thinking that may fix it) would i truly notice
a difference. I love the dvd player i just cant take this fault,
please help. Thanks

thanks is coax noticeably worse than optical?

thanks is coax noticeably worse than optical?

"Sander deWaal" wrote in message


(DanMan) said:

thanks is coax noticeably worse than optical?

If there's a difference, its usually worse. In this case, its worth a try.
Just use a 3' RCA-RCA interconnect to see if it is any better.

In your case it's probably better.

Only if it actually works better. I've got my doubts, but it's worth a try.

It is said that coaxial has several advantages over ordinary TOSLINK
connections, a greater bandwidth being one of them.

Problem is, coax outputs are generally driver through a special lossy
transformer that rolls response off above about 12 MHz to reduce EMI.

The TOSLINK has the advantage of electrical (galvanical) separation
between components.

Agreed. And since light is a far less serious threat to the nice picture on
your TV set, opitical connections need not be bandwidth limited.


I wouldn't make a problem out of it, just use whatever works.

Agreed.

"Arny Krueger" said:

It is said that coaxial has several advantages over ordinary TOSLINK
connections, a greater bandwidth being one of them.

Problem is, coax outputs are generally driver through a special lossy
transformer that rolls response off above about 12 MHz to reduce EMI.

IIRC, TOSLINK has barely 7 MHz of bandwidth.
Have to look that one up, though. May be old information.

--
Sander deWaal
"SOA of a KT88? Sufficient."

Sander deWaal wrote:

"Arny Krueger" said:

It is said that coaxial has several advantages over ordinary TOSLINK
connections, a greater bandwidth being one of them.

Problem is, coax outputs are generally driver through a special lossy
transformer that rolls response off above about 12 MHz to reduce EMI.

IIRC, TOSLINK has barely 7 MHz of bandwidth.
Have to look that one up, though. May be old information.

I've heard many times that the bandwidth is barely adequate but I just did
a quick Google and found
this.http://www.semicon.toshiba.co.jp/eng.../its2003_e.pdf

Seems like these devices have ample bandwidth. Don't know what was in use a
while back though.

Graham

"Sander deWaal" wrote in message

"Arny Krueger" said:

It is said that coaxial has several advantages over ordinary TOSLINK
connections, a greater bandwidth being one of them.

Problem is, coax outputs are generally driver through a special lossy
transformer that rolls response off above about 12 MHz to reduce EMI.

IIRC, TOSLINK has barely 7 MHz of bandwidth.

It all depends on the current drive capabilties of the driver transsister
for the transmitter. There are now a number of transmitter parts. The design
of its driver is up to the equipment designer.

Sander deWaal wrote:

"Arny Krueger" said:

It is said that coaxial has several advantages over ordinary TOSLINK
connections, a greater bandwidth being one of them.

Problem is, coax outputs are generally driver through a special lossy
transformer that rolls response off above about 12 MHz to reduce EMI.

IIRC, TOSLINK has barely 7 MHz of bandwidth.
Have to look that one up, though. May be old information.

For parts like this - TOTX 111- yes - Toshiba quote 6 MHz in fact

http://www.semicon.toshiba.co.jp/td/..._datasheet.pdf




Graham

DanMan wrote:

thanks is coax noticeably worse than optical?

What would you expect to be worse ?

They are both digital connections and hence aren't *meant* to influence
the sound.


Graham

"Pooh Bear" wrote in message

Sander deWaal wrote:

"Arny Krueger" said:

It is said that coaxial has several advantages over ordinary
TOSLINK connections, a greater bandwidth being one of them.

Problem is, coax outputs are generally driver through a special
lossy transformer that rolls response off above about 12 MHz to
reduce EMI.

IIRC, TOSLINK has barely 7 MHz of bandwidth.
Have to look that one up, though. May be old information.

For parts like this - TOTX 111- yes - Toshiba quote 6 MHz in fact


http://www.semicon.toshiba.co.jp/td/..._datasheet.pdf

They quote 10 MHz NRZ data rate for other devices. However, 5 or 10 MHz NRZ
data rate is not the same as a 10 MHz bandpass in the analog sense we used
with coax. It takes more bandpass than just the data rate to transmit a NRZ
singal with low error rates.

Probably the highest audio data rates that are widely used with Toslink
relate to the ADAT data format. Up to 8 24/48 audio channels are transmitted
over a single piece of TOSLink-type audio fiber, for a total data rate of
9,216,000 bps, exclusive of any overhead. Ths compares with 4,608,000 bps
for 24/96 2-channel audio (again exclusive of overhead bits), and
2,304,000 bps for 24/48 audio and DD.

Arny Krueger wrote:

"Pooh Bear" wrote in message

Sander deWaal wrote:

"Arny Krueger" said:

It is said that coaxial has several advantages over ordinary
TOSLINK connections, a greater bandwidth being one of them.

Problem is, coax outputs are generally driver through a special
lossy transformer that rolls response off above about 12 MHz to
reduce EMI.

IIRC, TOSLINK has barely 7 MHz of bandwidth.
Have to look that one up, though. May be old information.

For parts like this - TOTX 111- yes - Toshiba quote 6 MHz in fact


http://www.semicon.toshiba.co.jp/td/..._datasheet.pdf

They quote 10 MHz NRZ data rate for other devices. However, 5 or 10 MHz NRZ
data rate is not the same as a 10 MHz bandpass in the analog sense we used
with coax. It takes more bandpass than just the data rate to transmit a NRZ
singal with low error rates.

You gonna go into 'eye pattern' here ?


Probably the highest audio data rates that are widely used with Toslink
relate to the ADAT data format. Up to 8 24/48 audio channels are transmitted
over a single piece of TOSLink-type audio fiber, for a total data rate of
9,216,000 bps, exclusive of any overhead. Ths compares with 4,608,000 bps
for 24/96 2-channel audio (again exclusive of overhead bits), and
2,304,000 bps for 24/48 audio and DD.

If ADAT was using a TOSLINK device for 9.2Mbps then presumably it wasn't one of the
consumer 5-10 MHz devices.


Graham

"Pooh Bear" wrote in message

Arny Krueger wrote:

"Pooh Bear" wrote in message

Sander deWaal wrote:

"Arny Krueger" said:

It is said that coaxial has several advantages over ordinary
TOSLINK connections, a greater bandwidth being one of them.

Problem is, coax outputs are generally driver through a special
lossy transformer that rolls response off above about 12 MHz to
reduce EMI.

IIRC, TOSLINK has barely 7 MHz of bandwidth.
Have to look that one up, though. May be old information.

For parts like this - TOTX 111- yes - Toshiba quote 6 MHz in fact



http://www.semicon.toshiba.co.jp/td/..._datasheet.pdf

They quote 10 MHz NRZ data rate for other devices. However, 5 or 10
MHz NRZ data rate is not the same as a 10 MHz bandpass in the analog
sense we used with coax. It takes more bandpass than just the data
rate to transmit a NRZ singal with low error rates.

You gonna go into 'eye pattern' here ?


Probably the highest audio data rates that are widely used with
Toslink relate to the ADAT data format. Up to 8 24/48 audio channels
are transmitted over a single piece of TOSLink-type audio fiber, for
a total data rate of 9,216,000 bps, exclusive of any overhead. Ths
compares with 4,608,000 bps for 24/96 2-channel audio (again
exclusive of overhead bits), and 2,304,000 bps for 24/48 audio and
DD.

If ADAT was using a TOSLINK device for 9.2Mbps then presumably it
wasn't one of the consumer 5-10 MHz devices.

I don't know.

Pooh Bear said:

IIRC, TOSLINK has barely 7 MHz of bandwidth.
Have to look that one up, though. May be old information.

For parts like this - TOTX 111- yes - Toshiba quote 6 MHz in fact

http://www.semicon.toshiba.co.jp/td/..._datasheet.pdf

That was what I had in mind, yes.
There are better drivers available today, though.

--
Sander deWaal
"SOA of a KT88? Sufficient."