USBStreamer and 192kHz SPDIF sync??? - diyAudio
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Old 8th November 2014, 11:38 AM   #1
HpW is offline HpW  Switzerland
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Unhappy USBStreamer and 192kHz SPDIF sync???

I have a USBStreamer from the new batch Oct-2014 (with a new eeprom) and have issues to get 192Khz SPDIF sync working. Using my own opto cable it works until 176.4 kHz and with the given opto cable (ends looks like a shower head with plenty of stray lights at the ends) and 96kHz will even not sync.

Does some else have same issue and got a better ToshLink receiver as mentioned JensH USBStreamer multichannel USB audio interface #31

Any reply on this regard is welcome... even from miniDSP...

Hp
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Old 11th November 2014, 06:02 PM   #2
Davey is offline Davey  United States
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Are you testing this with a loopback connection, or some other scheme?

Dave.
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Old 11th November 2014, 08:25 PM   #3
HpW is offline HpW  Switzerland
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Are you testing this with a loopback connection, or some other scheme?
I did the test in a loopback connection and also feeding the USBStreamer input from a RME HDSP card, where the loopback on the RME works perfect at 192kHz.

How your USBStreamer works?

Hp
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Old 11th November 2014, 11:14 PM   #4
Davey is offline Davey  United States
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Mine seems to work okay with a 192khz loopback. However, it's pretty finicky because if I manipulate the connectors a little bit it loses connection.

I only have a couple of cheaper plastic cables so don't have more expensive ones to try.

Dave.
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Old 11th November 2014, 11:29 PM   #5
HpW is offline HpW  Switzerland
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Mine seems to work okay with a 192khz loopback. However, it's pretty finicky because if I manipulate the connectors a little bit it loses connection.
Do you use the given with the USBStreamer? If it's the case how the optical ends look like?

The best endings have a very clear cut. You may do the same do scrape with a sharp scalpel. If you connect one to and optical output and have the second opened, you should see a very clear light (not like from a shower brush ).

Some do a tweak using a liquid for better optical flow

Hp
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Old 12th November 2014, 03:53 PM   #6
Davey is offline Davey  United States
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I have one of the little tape dispensers used for minor prepping of fiber cable ends.
The cables shipped with the USBstreamer don't look too bad. I have a couple of other cheap cables but they don't work any better (or worse.)

Why don't you swap out the transmitter/receiver blocks as Jen has done?
His streamer interface seems like an excellent addition too.

I don't use mine that much and I only have 96khz (maximum) content, so this project will go near the bottom of my to-do list.

Dave.
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Old 12th November 2014, 06:33 PM   #7
HpW is offline HpW  Switzerland
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Why don't you swap out the transmitter/receiver blocks as Jen has done?
The replacement parts has been provided by miniDSP... and I am still waiting to get any feedback from the support...

While it culprit could also be the receiver PLL circuit ...

Hp
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