Remote TORX problems...

MWP · 24th February 2005, 07:39 AM

Hi all,

With my DAC + Amp layout the way it is, i could not mount the optical spdif TORX recievers on the DAC PCBs.

So the TORX recievers (there are 3) are mounted on the chassis with 3 wires braided for each running to the DAC PCBs.
The length of the longest wire from TORX to the PCB is ~20cm.

The two recievers with the shorter length wires, work perfectly all the time.
The one with the 20cm long run has problems syncing

Is there anything i can do it fix this problem (besides making the recievers closer)?

Thanks.

A 8 · 24th February 2005, 10:24 AM

I think we need more info to give any usable advice,

What kind of cables are you using between the torx and the dac board and how have you connected the cable ie grounding, additional resistors, caps ...etc?
A schematic would also help.
/Michael

macboy · 24th February 2005, 07:41 PM

The inductance of the wires is probably causing problems.
Add a bypass cap across the power supply pins of the TORX receivers. I'd try around 10 uF, but you can also try bypassing that with a smaller ceramic like 0.1 uF. Also consider adding a small (10 Ohm or so) resistor in series with the +5 V supply just before the TORX (before the capacitor). This will help reduce high frequency garbage in the power supply for the TORX.

tiroth · 24th February 2005, 07:46 PM

If you have proper decoupling, as macboy has outlined, it should work fine.

TORX are susceptible to induced interference, but I have never encountered a problem with this in practice.

24th February 2005, 07:39 AM	#1
MWP diyAudio Member Join Date: Oct 2002 Location: Adelaide, South Australia	Remote TORX problems... Hi all, With my DAC + Amp layout the way it is, i could not mount the optical spdif TORX recievers on the DAC PCBs. So the TORX recievers (there are 3) are mounted on the chassis with 3 wires braided for each running to the DAC PCBs. The length of the longest wire from TORX to the PCB is ~20cm. The two recievers with the shorter length wires, work perfectly all the time. The one with the 20cm long run has problems syncing Is there anything i can do it fix this problem (besides making the recievers closer)? Thanks.

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Torx digital input selector	lykkedk	Digital Source	9	13th October 2007 01:20 PM
WTB:Torx 179P or Equibalent Toslink Receivers	wup	Swap Meet	0	31st May 2006 07:43 PM
Need to source TORX toslink receiver	pixpop	Digital Source	11	25th January 2006 01:13 AM
Another CS8412/TDA1543 project..ToRX help.	setmenu	Digital Source	3	26th February 2004 11:23 AM
Torx 176	Bas Horneman	Parts	13	15th October 2003 12:06 PM

New To Site?	Need Help?
Register to Participate Search Privacy Statement Contact Us	Frequently Asked Questions Did you forget your password? Mark Forums Read


	Please consider donating to help us continue to serve you. Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving

24th February 2005, 10:24 AM	#2
A 8 diyAudio Member Join Date: Mar 2003 Location: Gothenburg	I think we need more info to give any usable advice, What kind of cables are you using between the torx and the dac board and how have you connected the cable ie grounding, additional resistors, caps ...etc? A schematic would also help. /Michael

24th February 2005, 07:41 PM	#3
macboy diyAudio Member Join Date: Oct 2003 Location: Ottawa, Canada	The inductance of the wires is probably causing problems. Add a bypass cap across the power supply pins of the TORX receivers. I'd try around 10 uF, but you can also try bypassing that with a smaller ceramic like 0.1 uF. Also consider adding a small (10 Ohm or so) resistor in series with the +5 V supply just before the TORX (before the capacitor). This will help reduce high frequency garbage in the power supply for the TORX.

24th February 2005, 07:46 PM	#4
tiroth diyAudio Member Join Date: Dec 2001 Location: Pittsburgh, PA, USA	If you have proper decoupling, as macboy has outlined, it should work fine. TORX are susceptible to induced interference, but I have never encountered a problem with this in practice.

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)