Category Archives: AES

QTP DB25 Pin out standards

AES, Connections, DB25, Pinout, QTP, QTP to DB25, RJ45, T-568A

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. 
QTP-DB25F - Face 3:4Screenshot 2015-05-05 14.25.00QTP-DB25F - Face 3:4

DB25Pinout
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 Tascam1

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.
yamaha1

All the RJ 45 connectors terminate to the TIA -B standard and use the following pair and polarity designation
Screen Shot 2015-03-14 at 10.10.47 AM

QTP AES 110Ω to 75Ω SPDIF BNC over Quad Twisted Pair!

AES, Audio, Balancing, Connections, Interface, Quad Twisted Pair, Testing, WBS, XLR

 

 

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!   Screenshot 2015-03-16 17.23.46
 Screenshot 2015-03-16 17.36.04