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Brian, many thanks, I think that may well be a world record for post to the UK. I ordered a TOSLINK on the 17th and a S/PDIF 4:1 MUX/Receiver Module on the 21st Oct. Today is the 25th and I have both, indeed I have had the TOSLINK for a few days!
In any event, is their a manual for the S/PDIF 4:1 MUX/Receiver Module? The link to it on this website leads no where.
Many thanks,
Russ
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I was looking at the schematic and the board to determine how to wire it to the Buffalo and something caught my attention. In the schematic T1, T2, T3 and T4 have pin 4 connected to GND, but according to the data sheet at http://www.newava.com/pdf/S22083.pdf, the board has pin 3 connected to ground for each transformer. The S22083’s physical diagram at the top of the page indicates that pin 3 is diagonally opposed to pin 1. Edited by user Saturday, October 25, 2008 5:21:00 PM(UTC)
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It just the difference in the way my CAD program automatically numbered the pins. Everything is done correctly. :)
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The S22083’s physical diagram indicates that pin 3 is diagonally opposed to pin 1 whereas the electrical diagram shows them right across from each other. Your schematic matches the electrical diagram but the board does not match the physical diagram. It is no my intention to cause any problem, I am just trying to help. Edited by user Saturday, October 25, 2008 5:39:56 PM(UTC)
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Also, could you please tell me how to wire the TOSLINK to the MUX? Edited by user Saturday, October 25, 2008 5:47:36 PM(UTC)
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Do you plan on using AES? If not then use the AES input "+" and wire "-" to the TOSLINK GND. Nothing gets wired to AES GND in this case. Otherwise just wire it to one of the other SPDIF inputs as normal. Edited by user Saturday, October 25, 2008 6:00:46 PM(UTC)
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grimberg wrote:I was looking at the schematic and the board to determine how to wire it to the Buffalo and something caught my attention. In the schematic T1, T2, T3 and T4 have pin 4 connected to GND, but according to the data sheet at http://www.newava.com/pdf/S22083.pdf, the board has pin 3 connected to ground for each transformer. The S22083’s physical diagram at the top of the page indicates that pin 3 is diagonally opposed to pin 1. I see what you mean. Fortunately it does not seem to matter at all. :) If you want to you can reverse the "+" and "-" inputs. Edited by user Saturday, October 25, 2008 6:24:33 PM(UTC)
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Russ, I am trying to bring to your attention that, if the physical diagram in the S22083’s data sheet is correct, the transformer’s secondary’s pins are PROPERLY connected in your schematic but INVERTED on the board. That is because the data sheet shows the pins numbered counterclockwise in the physical diagram but top-down, left-right in the electrical diagram. Therefore, on the MUX board, the physical placement of the pins matches the electrical diagram but not the physical diagram. If my understanding is correct, the MUX will still work but the signal’s phase will be shifted 180 degrees. Just to illustrate, looking at the data sheet for the Pulse PE-65612* for example http://ww2.pulseeng.com/...cts/datasheets/T601.pdf, the physical and electrical diagrams match. (*) I am not suggesting they are functionally equivalent, just illustrating my explanation.
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Yes, I understand perfectly what you are saying. What I am saying is that practically it makes no difference at all if the phase is 180 shifted. Biphase encoding does not care. As I mentioned earlier, if you are concerned you can swap "+" and "-" on the primary side. :) http://en.wikipedia.org/wiki/Biphase_mark_codeI do appreciate you bringing it to my attention, but it won't make any difference at all in in the operation of the board. :EDIT: linked to a better example. :/EDIT: Edited by user Saturday, October 25, 2008 7:01:53 PM(UTC)
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You edited your post while I was typing a more detailed explanation. This has been a learning opportunity for me, reason why I wanted to talk about this issue.
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No worries, and good eye! :)
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Russ, Last night I connected the CS8416 MUX to the Buffalo DAC but nothing happened. Tonight I will try to find out what’s wrong. To help me double-check everything could you please tell me what are the appropriate settings for the on-board switches? I connected the Squeezebox (S/PDIF RCA, 500mVpp) to IN1 and shorted terminals 0, 1 and GND. I connected the CS8416 MUX to the LCDPS sharing the VD side and made the following connections to the Buffalo: MUX Buffalo MCK --> No connection G --> G BCK --> DCK LRCK --> D1 DOUT --> D2 SPDIF - --> No connection SPDIF + --> No connection On the Buffalo board I also turned the SPDIF switch OFF. Edited by user Tuesday, October 28, 2008 5:38:24 PM(UTC)
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The 1 and 0 terminals have a pull down to GND already. You can just leave them open if you are using input #1
Do you get a lock light on the mux?
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Also, which version of buffalo do you have?
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The Buffalo I purchased a little over a month ago in the event that GoDaddy screwed up.
When I tried it last night I did not get the Lock LED to light up. I soldered the LED and extended one of its leads to form a bridge with GND, as you had mentioned that was a necessary correction.
I am posting the question now because by the time I get home (8:30 PM PT) you will probably be in bed already.
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OK, the first thing to do is just test he MUX itself. Do not connect it to the buffalo. You should get a lock light if it is receiving correctly.
Are you positive the LED is oriented correctly? (I am sure it is, I just have to ask)
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It is OK to ask any question, I have dealt with and resolved my ego issues a long time ago. :-)
I promise I'll double-check the orientation of the LED tonight. I’ll also check the connection to the power supply, disconnect the MUX from the Buffalo and try to get a lock.
How about the switches? Is it OK to just leave them in the center position?
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I would not leave them open as they will be floating. That may be the problem. Here is my suggested setup:
Switch 1: -
Switch 2: +
Switch 3: +
Switch 4: -
Let me know if that works.
Cheers!
Russ
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The tip on starting the MUX by itself was a good one. It turns out that as soon as I did that, the Lock LED lit up. I then connected it to Buffalo, set switch 1 to PCM/DSD (-) and everything worked fine. The problem I experienced on Monday evening was most likely just a wire not properly connected. Tonight I will wire the TOSLINK and the rotary switch.
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Very good news! Keep me posted.
Cheers!
Russ
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