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Old 13th December 2013, 08:55 PM   #11
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I was just going to ask the same thing.

No good reason to use I2S over SPDIF here.
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Old 13th December 2013, 10:06 PM   #12
glt is offline glt  United States
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Hi Russ,

Merry Christmas!

cringvig, try moving the i2s wires as far away from anything else as possible. Or move the cable around and see if it affects the locking.
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Old 14th December 2013, 02:33 PM   #13
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Hi All

Thanks for your replies.

I have tried to move things and wires around with no luck.
Last night i had the DAC connected to the M2tech evo with the i2s output and was just a cutted ethernet cable and it worked perfectly.
So in this case the wires did not make a problem.

The AE does only have internal i2s or toslink out so it is not possible to test with s/pdif.

What about the FIFO reclocker ?

Chris
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Old 14th December 2013, 02:56 PM   #14
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Toslink is SPDIF So if you can find the signal to the transmitter you can use that. Use a voltage divider to get it close to consumer level. Something like 221R series and 75R to GND.
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Old 14th December 2013, 05:09 PM   #15
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OK got it

Maybe I am wrong but I have always been thinking that i2s is to prefer when availible instead of SPDIF as it is the native DAC input ?



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Old 14th December 2013, 05:43 PM   #16
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Depends on who you believe.

In any case it also depends on what actually works - and how the source is designed.

You can do I2S as badly or worse than SPDIF, and in any case the ES9018 does not handle SPDIF like most SPDF receivers do at all. It handles it far better and asynchronously.
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Old 17th December 2013, 10:31 AM   #17
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Hi Russ

I have found the spdif out from the AE and with the divider you suggested the voltage is about 0.6V
I connected to the Buffalo DAC but it would not lock.

Tried the same wires on another DAC and it did lock right away with no drop outs.

Then I had the scope on at the same time and saw that the voltage is pull down to 0.3V.

Hmm... tried the i2s again and it will not lock and the voltage is pulled down from 3.2V to 0.5V when connected to the Buffalo DAC.

When I removed the wires from the DAC the signal is 3.3V and 2.8Mhz.

What has happent here ?

Both SPDIF and i2s is pulled down when connected to the Buffalo DAC

Chris
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Old 17th December 2013, 12:01 PM   #18
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Are you remembering to change the IP_S jumper/switch?
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Old 17th December 2013, 02:08 PM   #19
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Hi Russ

Thank you for quick reply.
Yes I did remember the jumper and it make no difference.

I think something must have happend to the Buffalo board but I have no clue as I do not have the schematics.

On the picture the yellow channel is directly from the signal generator and the blue one is from the signal generator to the Buffalo DAC.

I have been re-soldering all the junctions I have made myself.

I really need some advise what to check.

Thanks
Chris
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Old 17th December 2013, 02:21 PM   #20
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At what exact points are you measuring?

Does the same thing occur for all inputs?

If anything failed it would be one of the input multiplexors.
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