Welcome Guest! To enable all features please Login or Register.

Notification

Icon
Error

Login
TOSLink Resistors
Options
View
Go to last post Go to first unread
Previous Topic Next Topic
renanj  
#1 Posted : Wednesday, July 31, 2013 6:46:37 PM(UTC)
renanj

Rank: Member

Groups: Member
Joined: 5/19/2010(UTC)
Posts: 24
Location: Redmond, WA

Thanks: 2 times
Please help - Do you know why there are 2 sets of RP and RS resistors for the TOSLINK module I just received. One set is 0 ohms and 0 ohms, the other set is 75 ohms and 270 ohms. Which pair should I use? There are no docs for this. Thank you!
Back to top

Wanna join the discussion?! Login to your Twisted Pear Audio Support forum accountor Register a new forum account.
Back to top  
Brian Donegan  
#2 Posted : Wednesday, July 31, 2013 6:49:40 PM(UTC)
Brian Donegan

Rank: Administration

Groups: Administration, Customer
Joined: 10/24/2006(UTC)
Posts: 2,868
Location: Massachusetts, USA

Thanks: 2 times
Was thanked: 141 time(s) in 134 post(s)
We added two resistor positions to the board which act as a simple voltage divider. They allow you to select the S/PDIF output voltage you want to use: 3.3V TTL-level or Consumer-level.

For 3.3V TTL output, use only the 0-ohm Rs (no Rp used).

For Consumer-level output, use 75-ohm Rs and 270-ohm Rp.

I will try to get the manual updated.
Back to top
WWW
thanks 1 user thanked Brian Donegan for this useful post.
renanj on 8/1/2013(UTC)
LeonvB  
#3 Posted : Thursday, August 1, 2013 5:14:44 PM(UTC)
LeonvB

Rank: Member

Groups: Member
Joined: 5/23/2010(UTC)
Posts: 708
Location: Netherlands

Thanks: 2 times
Was thanked: 48 time(s) in 45 post(s)
Brian,

Are you sure? The Rs and Rp values seem to be swapped. Either in your text, or in mine. The toslink module is described on page 69 of the guide.
Back to top
cubeasic  
#4 Posted : Monday, February 2, 2015 3:10:52 PM(UTC)
cubeasic

Rank: Member

Groups: Member
Joined: 9/28/2011(UTC)
Posts: 31
Location: Germany

Thanks: 2 times
A short follow-up question about the output-configuration of the TOSlink module:

Apparently I have one of the old TOSlink modules, because I don´t have any additional resistor positions for Rp and Rs.
Is that true?

If so, I assume it is set to TTL output by default?
This means I can use it directly into the sidecar, without the 4-SPDIF input board. Right?

Sorry if I ask simple questions, but the documentation on this is not as clear as I would like it...

Thanks,
Florian
Back to top
cubeasic  
#5 Posted : Monday, February 2, 2015 3:19:36 PM(UTC)
cubeasic

Rank: Member

Groups: Member
Joined: 9/28/2011(UTC)
Posts: 31
Location: Germany

Thanks: 2 times
Ok, I re-read the Leons manual and it is clear now :-)

Of course it will output TTL level by default..

Sorry
Back to top
Rss Feed  Atom Feed
Users browsing this topic
GuestUser (2)
Forum Jump  
You cannot post new topics in this forum.
You cannot reply to topics in this forum.
You cannot delete your posts in this forum.
You cannot edit your posts in this forum.
You cannot create polls in this forum.
You cannot vote in polls in this forum.

Youtube
Copyright © Twisted Pear Audio