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View Full Version : Best Options For Switching Digital Audio and S-Video?


Will
August 26th 06, 07:05 PM
I'm looking for a receiver, or separate discrete switching devices, that
will switch up to five S-Video inputs, and five optical audio inputs. What
are some high quality options under $500? I do not need a power amplifier.

Starting with optical audio, I've seen these all over the place on price,
from $5 cheap plastic switches that take TOSLINK inputs, to $100 Radio Shack
powered devices that switch up to eight TOSLinks, to high end receivers that
switch TOSLINK. My first question is does optical audio switching really
benefit much from the quality of the switching device? Given that the
signal is optical, other than possibly attenuating the signal too much, will
a cheap switcher do as good a job as an expensive one? An important
requirement for this application is that the receiver should not decode the
DTS or Dolby signals but should just switch and pass through the signals to
the output.

In terms of S-Video, this appears to be very sensitive to the quality of the
switching equipment. I tried using some cheaper switchers for S-Video, and
they horribly degraded the signal. The same signals looked decent on a
Harmon Kardon AVR300, but unfortunately that receiver doesn't support five
devices.

I see that Harmon Kardon has an AVR 645 receiver that comes close to my
requirement, but that is outside my target price range.

--
Will

Scott Dorsey
August 26th 06, 07:33 PM
Will > wrote:
>I'm looking for a receiver, or separate discrete switching devices, that
>will switch up to five S-Video inputs, and five optical audio inputs. What
>are some high quality options under $500? I do not need a power amplifier.

How about a video switcher?

>Starting with optical audio, I've seen these all over the place on price,
>from $5 cheap plastic switches that take TOSLINK inputs, to $100 Radio Shack
>powered devices that switch up to eight TOSLinks, to high end receivers that
>switch TOSLINK. My first question is does optical audio switching really
>benefit much from the quality of the switching device? Given that the
>signal is optical, other than possibly attenuating the signal too much, will
>a cheap switcher do as good a job as an expensive one? An important
>requirement for this application is that the receiver should not decode the
>DTS or Dolby signals but should just switch and pass through the signals to
>the output.

They're all fine. The cheaper ones will be flimsier and more prone to
break.

Fancier ones will switch audio and video at the same time.

>In terms of S-Video, this appears to be very sensitive to the quality of the
>switching equipment. I tried using some cheaper switchers for S-Video, and
>they horribly degraded the signal. The same signals looked decent on a
>Harmon Kardon AVR300, but unfortunately that receiver doesn't support five
>devices.

If you buy decent ones, they will not be a problem. Look in the Markertek
Video Supply catalogue, which will have lots of good switches.
--scott
--
"C'est un Nagra. C'est suisse, et tres, tres precis."

Will
August 26th 06, 08:53 PM
"Scott Dorsey" > wrote in message
...
> >In terms of S-Video, this appears to be very sensitive to the quality of
the
> >switching equipment. I tried using some cheaper switchers for S-Video,
and
> >they horribly degraded the signal. The same signals looked decent on a
> >Harmon Kardon AVR300, but unfortunately that receiver doesn't support
five
> >devices.
>
> If you buy decent ones, they will not be a problem. Look in the Markertek
> Video Supply catalogue, which will have lots of good switches.

So for S-Video switching which brands and models are the "decent ones"?

--
Will

Scott Dorsey
August 26th 06, 08:55 PM
Will > wrote:
>"Scott Dorsey" > wrote in message
...
>> >In terms of S-Video, this appears to be very sensitive to the quality of
>the
>> >switching equipment. I tried using some cheaper switchers for S-Video,
>and
>> >they horribly degraded the signal. The same signals looked decent on a
>> >Harmon Kardon AVR300, but unfortunately that receiver doesn't support
>five
>> >devices.
>>
>> If you buy decent ones, they will not be a problem. Look in the Markertek
>> Video Supply catalogue, which will have lots of good switches.
>
>So for S-Video switching which brands and models are the "decent ones"?

Anything Markertek sells will be decent. Look for something that has a
response plot on the data sheet... it shouldn't roll off until 6 MC or
higher. Just as long as you avoid the consumer junk you'll be fine... it
doesn't take much to switch video but you DO need to make sure everything
is really 75 ohms throughout.
--scott
--
"C'est un Nagra. C'est suisse, et tres, tres precis."