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
The need for 8p8c to 8p8c connectivity is of the utmost importance.
Second to is the “field breakouts”. The colour plays a huge part.
I’ve been noticing more and more breakout tails entering the market, so it needs addressing. We cannot use the 25 pair or TIA colour codes to determine the channels.
For the field, I would expect a simple visual inspection to influence deployment decisions. Looking at the solid colours to determine the channel order. Below is an image that has been the result of many conversations. An observation I’d like to present: If you look at RJ45 connectors the solid colours are visible. The order of the solid colour should dictate the channel order. Pair three in both cases is split around pair 2. Pins of multiples of 2 are considered “Hot”. QTP-B is based on the TIA-B wiring scheme.
This is where a lot of QTP development started. How to terminate this twisted 3M ribbon cable to an RJ45 Jack. Since it would not fit and CAT cable is everywhere…
QTP-A and QTP-B
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
Someone at NAB asked a great question:
“How does QTP hook up to Studio Hub?”
The answer is “perfectly” with a few Q-mandments broken….
Such a great question demanded it’s own forum
See more on the forum:
QTP – DB25
QTP-DB25M+ Male + Shield
QTP-DB25Y Yamaha Male
QTP-WBS WBS-High Density Breakout – TBA NAB-2015
QTP – BREAK OUT BOX
QTP-BOB-XLR-FM Female / Male
QTP-BOB-XLR-MF Male / Female
QTP-BOB-BNC AES / SPDIF
QTP-BOB-BNC10 AES / SPDIF w/ 10dB pad
QTP – TAILS
QTP-XX-*-XLR-FM Female / Male
QTP-XX-*-XLR-MF Male / Female
QTP-XX-*-TRS Tip Ring Sleeve
QTP-XX-* -U User-terminated
XX = Cable Length (ft) 3, 5, 15, 30
* = Tail Length (ft) 1, 2, 3, 4
QTP – Kits
QTP-CAT6-KEY Keystone Termination
QTP-HSK-1 1’ Heat Shrink Kit
QTP-HSK-2 2’ Heat Shrink Kit
QTP – PANEL
QPNL-3-DB25 2RU ¼ Panel
QPNL-4-DB25 2RU ¼ Panel
We’re Excited to announce we’ll be at NAB2105 at the Ward-Beck Systems Booth C2541!!
A user pointed out to me that the pairs Go from 1-4 in the order of SUN, SKY, GRASS and EARTH
It was too good of an observation to not share!