from:
http://www.aes.org/standards/comments/comments-draft-aes72-xxxx-190215.cfm
from:
http://www.aes.org/standards/comments/comments-draft-aes72-xxxx-190215.cfm
AES X246 proposal for standards is out from the SC-02-05 working group.
This give the working group an opportunity to comment on a pattern describing Pair order and caveats of using QTP.
Not letting anything out of the bag because the manufacturers are mixed around.
Something magical about the Quad choice. QTP-4-Everyone
I had an integrator call today asking what the compatible pin outs of the QTP-DB25 adapters were .
QTP-DB25M and QTP-DB25M use the Tascam DB25 Pinout.
Channels 1-4 terminate to one RJ45 and 5-8 to the other.
If you are using AES in and out the pin out is identical.
CH 1-4 are IN 1-4 and CH 5-8 are OUTPUT 5-8
The Third Compatible pin out is the Yamaha AES pin out. The QTP-DB25Y is only available in a male DB25 connector. The IN the first RJ45 and OUT the second.
All the RJ 45 connectors terminate to the TIA -B standard and use the following pair and polarity designation
I would love to tell you more about it… but that will have to wait until after NAB 2015!
Visit Quad Tiwsted pair at the Ward-Beck Systems Booth C2541!!
Some more Quad Twisted Pair results are in using custom wound transformers found in the renown Ward-Beck Systems IMP series.
We’re finding an insignificant Jitter of less that 200 pico seconds across the spectrum at a clock speed of 192Khz, making QTP perfect for the transmission of digital AES signals up to 192Khz. More to come!