[BC] AES/EBU issue

[Mike McCarthy]

I think the STL boxes need be to put on an AES test rig to determine
comformance to the standard. A scope will only show the eye pattern,
simple noise and ultimate eye quality. It will not show clock or sample
rate, bit rate, timing, jitter, BER, or anything else related to AES QC. 
Which brings up a point....does the Moseley output imbedded clock and does
either the Titus or Orban product require external clock sync?  I think
the latter products have built in syncronizers. I don't know about the
DSP6000 however.

As silly as this sounds, you should plug the STL's into a high quality
sound card and mess with the sound card settings (if not automated) to see
which AES group is output. Moseley might be right...they're functioning as
designed, but potentially incompatible with the downstream products
lacking the clock sync system Moseley might employ. Recall this was a
problem in early AES days. And the DSP6000 series is from that era.

MM

> At one of my clients we decided to use AES/EBU digital audio from the STL
> output.  It comes from an older Moseley DSP6000D to a Titus 3 DRX
> switcher,
> and then to the Orban processor.  The cable is only a few feet long with
> XLR
> connectors.
>
> Problem is, the Moseley AES/EBU is not detected by either the Titus or
> Orban
> units.  Both will detect a wide range of speeds which includes the Moseley
> 32KHz rate.  The internally created output from the Titus is accepted by
> the
> Orban, and a separate digital input is detected by the Titus.  Both of
> those
> do work on inputs, just not with the Moseley outputs.
>
> There are two Moseley DSP6000D units, main and backup.  Neither are
> detected
> by the Titus or Orban units.  I took some 'scope pictures of the DSP6000D
> outputs and they do appear OK according to the Moseley tech.  I've had a
> number of phone and email conversations with the Moseley tech and he feels
> the units are OK.  There are no settings or adjustments within the
> DSP6000D
> that affect the digital output.  I did get a return authorization, but
> they
> feel it wouldn't help.
>
> The appropriate tech people at all three companies have been helpful with
> suggestions, but nothing has worked.  I have no problem with them at all.
>
> So, my question is, does anyone have a situation where this particular
> Moseley unit is connected to either a Titus or Orban box and it works?
> Has
> anyone had a similar problem where it didn't work?
>
> Craig Healy
> Providence, RI
>
>