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renanj  
#1 Posted : Wednesday, July 31, 2013 6:46:37 PM(UTC)
renanj

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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!
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Brian Donegan  
#2 Posted : Wednesday, July 31, 2013 6:49:40 PM(UTC)
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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.
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renanj on 8/1/2013(UTC)
LeonvB  
#3 Posted : Thursday, August 1, 2013 5:14:44 PM(UTC)
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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.
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cubeasic  
#4 Posted : Monday, February 2, 2015 3:10:52 PM(UTC)
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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
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cubeasic  
#5 Posted : Monday, February 2, 2015 3:19:36 PM(UTC)
cubeasic

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

Of course it will output TTL level by default..

Sorry
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