Had the same after many month of troublefree playing. Even putting something lightweight on the case caused crackling - very strong on slight movenmts of the cable itself. I pulled a little bit the ribbon cable that leads to the input and on that end it was sensitive and now its gone - moving the ribboncable as much as I like does no longer any harm!
Though its not your issue - Ryssen - I wanted to post it anyway.
greetings
Michael
Well here it says 139 Euro again http://www.selectronic.fr/dcx2496_fr.asp#04
Dont know what this is?My french is "nada"...
Dont know what this is?My french is "nada"...
Hi Ryssen,
GND of your S/PDIF source should be connected to DCX GND (XLR pin 1). If your S/PDIF source is galvanically isolated (transformer) use a short! 110 ohm symmetrically cable with shield and connect both GNDs via shield.
Also driving capability of your S/PDIF source might be too low. Using a short cable (max 1m) you could change R15 on the DSP board from 110 ohm to about 200-500 ohm.
Greetings,
Frank
PS: By the way the 74HC02 mod works pretty well. Additional pull down (10k) on pin 28 (CS8420) and pull up on pin 3 is required (HW mode 5, serial output format OF2).
GND of your S/PDIF source should be connected to DCX GND (XLR pin 1). If your S/PDIF source is galvanically isolated (transformer) use a short! 110 ohm symmetrically cable with shield and connect both GNDs via shield.
Also driving capability of your S/PDIF source might be too low. Using a short cable (max 1m) you could change R15 on the DSP board from 110 ohm to about 200-500 ohm.
Greetings,
Frank
PS: By the way the 74HC02 mod works pretty well. Additional pull down (10k) on pin 28 (CS8420) and pull up on pin 3 is required (HW mode 5, serial output format OF2).
This is not an uncommon issue, but it is not restricted to the DCX or indeed Behringer. I have 2 DCX's and they both had the same ribbon cable problem and Behringer paid for an independent repairer near me to fix them even though they were out of warranty. The repairer said many pro audio manufacturers now use ribbon to connect the main board to the I/O board, and they are causing problems. They said repair jobs are coming in just as much from more expensive brands; it is not price-related.thylantyr said:
SB Live! to DX2496 digitally?
my apologies for a question that might already have been answered but i haven't been keeping up with this thread and simply don't have the time to sift through 101 pages (got to be one of the longest here surely?)
anyways i've recently installed a soundsystem in a bar using a DX2496 with the audio supplied by a soundblaster live card in their desktop pc
my original intention was to run this digitally but i'm having problems getting it to work
can anyone give me any tips?
does the digital input on the dcx work in the left/right & ground format (being as it's a 3 pin socket) or is it hot/cold & shield? (which are tied together?)
ie does the dcx have the capabilities to split the left/right components from a 'mono' signal?
as to the SB Live as far as i'm aware is one of the originals and as a result (according to the creative site) the digital out also doubles as center and sub outs and is therefore a 3 pole 3.5mm socket
i wired this all up as left/right & ground using a 5m mic cable (the amp rack is hidden away from idiots) but somewhere down the line i've made a mistake and it's not working
granted this is all stuff i should have thought about before the installation but could someone kindly point out the error of my ways?
ie is there anything i've missed in the setup on the pc (the dcx is self explanatory) or have i just wired it completely wrong in which case could i be shown the correct way please?
thanks in advance
Dave
my apologies for a question that might already have been answered but i haven't been keeping up with this thread and simply don't have the time to sift through 101 pages (got to be one of the longest here surely?)
anyways i've recently installed a soundsystem in a bar using a DX2496 with the audio supplied by a soundblaster live card in their desktop pc
my original intention was to run this digitally but i'm having problems getting it to work
can anyone give me any tips?
does the digital input on the dcx work in the left/right & ground format (being as it's a 3 pin socket) or is it hot/cold & shield? (which are tied together?)
ie does the dcx have the capabilities to split the left/right components from a 'mono' signal?
as to the SB Live as far as i'm aware is one of the originals and as a result (according to the creative site) the digital out also doubles as center and sub outs and is therefore a 3 pole 3.5mm socket
i wired this all up as left/right & ground using a 5m mic cable (the amp rack is hidden away from idiots) but somewhere down the line i've made a mistake and it's not working
granted this is all stuff i should have thought about before the installation but could someone kindly point out the error of my ways?
ie is there anything i've missed in the setup on the pc (the dcx is self explanatory) or have i just wired it completely wrong in which case could i be shown the correct way please?
thanks in advance
Dave
As I have the DEQ2496 after the S/PDIF source (M-1000)connected as you describe,cable lenght 30cm.and the DCX2496 after the DEQ.I have a fully balanced XLR cabel between the to,30cm length.The DEQ can take the S/PDIF signal far above the red led,without distortion,the DEQ
can´t even take the half of it...I am going to do the Mode 5 thing when I get some spare time,and I´ve ordered a PCB for the Oelbach mod and maybee put a switch inbetween the 2.
Hi Ryssen,
I assume you don't have the problems using the analog inputs? Then the reason should be the S/PDIF input only.
The Oelbach mod and the 74HC02 mod adress quality of the digital input only but not crackling.
I assume your M-1000 has a RCA (cinch) connector for S/PDIF (consumer) output? So your source so far should be two ends of a tranformer coil, but not GND. You need to connect the shield of the cable to GND of your soure as well to connect GNDs of M1000 and DCX !!!
Try to replace R15 as well. With a 30 cm cable you can increase the 110 ohm value to reduce load of the source, so you'll get higher level.
Frank
I assume you don't have the problems using the analog inputs? Then the reason should be the S/PDIF input only.
The Oelbach mod and the 74HC02 mod adress quality of the digital input only but not crackling.
I assume your M-1000 has a RCA (cinch) connector for S/PDIF (consumer) output? So your source so far should be two ends of a tranformer coil, but not GND. You need to connect the shield of the cable to GND of your soure as well to connect GNDs of M1000 and DCX !!!
Try to replace R15 as well. With a 30 cm cable you can increase the 110 ohm value to reduce load of the source, so you'll get higher level.
Frank
Tryied analog in ,sounds as it should!By the way are you supossed to be able to change the input sens in digital in?Only works in analog mode.
This is M-1000 S/PDIF:
Should I Remove C56 and solder a wire ro ground?From the RCA the 30cm cable goes to a XLR with 1 and 3 grounded together,and the hot is pin 2.I have a 220 ohm resitor between ground and pin 2 as mentiod in many threds here.BTW I messaured 56 ohm when conected only to the M-1000.Between DEQ and DCX is a 30cm cable with XLR in the ends,one wire to each of the 3 pins.I´ve tried to ground 1 pin inthe cable between DEQ and DCX,no DIFFERENCE..
This is M-1000 S/PDIF:
An externally hosted image should be here but it was not working when we last tested it.
Should I Remove C56 and solder a wire ro ground?From the RCA the 30cm cable goes to a XLR with 1 and 3 grounded together,and the hot is pin 2.I have a 220 ohm resitor between ground and pin 2 as mentiod in many threds here.BTW I messaured 56 ohm when conected only to the M-1000.Between DEQ and DCX is a 30cm cable with XLR in the ends,one wire to each of the 3 pins.I´ve tried to ground 1 pin inthe cable between DEQ and DCX,no DIFFERENCE..
Hi Ryssen,
r23=75r confirms that the digital out is looking for a 75r load. This is the standard loading for SPDIF.
The DCX2496 is set for an AES signal which is expecting 110r loading.
If the source and receive loads are matched then the reflections up & down the cable are minimised (precise matching=elimination).
If you intend using SPDIF as your sole source for DCX then reducing the DCX input resistor to 75r would make more sense.
or
add a switchable resistor (236r or 240r) in parallel to 110r to reduce the effective loading to 75r when SPDIF is the source.
Oettle,
why are you suggesting that the receive resistor be increased from 110r to >=200r, when this will increase the risk of digital data being misread due to excessive reflection of the signal.
Behringer claim that DCX will accept digital signals between 300mVpp and 10Vpp. SPDIF when loaded correctly will give well above the 300mVpp minimum.
r23=75r confirms that the digital out is looking for a 75r load. This is the standard loading for SPDIF.
The DCX2496 is set for an AES signal which is expecting 110r loading.
If the source and receive loads are matched then the reflections up & down the cable are minimised (precise matching=elimination).
If you intend using SPDIF as your sole source for DCX then reducing the DCX input resistor to 75r would make more sense.
or
add a switchable resistor (236r or 240r) in parallel to 110r to reduce the effective loading to 75r when SPDIF is the source.
Oettle,
why are you suggesting that the receive resistor be increased from 110r to >=200r, when this will increase the risk of digital data being misread due to excessive reflection of the signal.
Behringer claim that DCX will accept digital signals between 300mVpp and 10Vpp. SPDIF when loaded correctly will give well above the 300mVpp minimum.
Hi Andrew,
I would say the output impedance of the M1000 isn't 75 but about 100 + 75 ohms. With a 30 cm cable reflections aren't the big problem, but level. I had already dropouts with a 2V S/PDIF source, Jan too. Based on this experience this 300 mV value from Behringer seems to be very unrealistic.
Frank
I would say the output impedance of the M1000 isn't 75 but about 100 + 75 ohms. With a 30 cm cable reflections aren't the big problem, but level. I had already dropouts with a 2V S/PDIF source, Jan too. Based on this experience this 300 mV value from Behringer seems to be very unrealistic.
Frank
Thanks for the aswers,but I think you guys are forgetting that I have a DEQ after the M-1000..the DCX is after the DEQ.
If I make this:
1. DEQ XLR 1 with M1000 GND (D)
2. DEQ XLR 2 with M1000 pin 2 (hot)
3. DEQ XLR 3 with M1000 pin 1 (cold)
instead,without a resistor?
And I don´t have a schema of DEQ digital out,but if not wrong,it should output AES/EBU,110r, and that´s what the DCX will recive?
So I should be fine with:
XLR 1 to XLR 1
XLR 2 to XLR 2
XLR 3 to XLR 3
Right?
The DEQ works absolutely fine with M-1000...
OFF topic
hi
for those who are interestet in the jitter ropic, I updated my page withsome nice measuremants.
"http://www.kinotechnik.edis.at/pages/dcx2496/DCX2496/DCX2496_analog_digital_input.htmll"
http://www.kinotechnik.edis.at/pages/dcx2496/DCX2496/DCX2496_analog_digital_input.html
Ryssen
did you ever measure voltage and current flow (over a resistor) from ground (DEQ) to ground (DCX)?
I connected XLR-PIN1 (DCX) only to the shield and didn't connect the shield on the other end but I think that is what you already tried.
greetings
Michael
hi
for those who are interestet in the jitter ropic, I updated my page withsome nice measuremants.
"http://www.kinotechnik.edis.at/pages/dcx2496/DCX2496/DCX2496_analog_digital_input.htmll"
http://www.kinotechnik.edis.at/pages/dcx2496/DCX2496/DCX2496_analog_digital_input.html
Ryssen
did you ever measure voltage and current flow (over a resistor) from ground (DEQ) to ground (DCX)?
I connected XLR-PIN1 (DCX) only to the shield and didn't connect the shield on the other end but I think that is what you already tried.
greetings
Michael
Ryssen,
did you try to avoid DC current flow by soldering around 10n-100nF to XLR-PIN1 and XLR-PIN3 at the DCX.
The DCX has an tiny and much less then ideal input transformer that easily can be satturated even by very little DC currents flowing from some minor offset voltages of the output stage of the source device.
Greetings
Michael
did you try to avoid DC current flow by soldering around 10n-100nF to XLR-PIN1 and XLR-PIN3 at the DCX.
The DCX has an tiny and much less then ideal input transformer that easily can be satturated even by very little DC currents flowing from some minor offset voltages of the output stage of the source device.
Greetings
Michael
Hi,
the input led monitors work differently when using a digital input.
It is common/normal for the "reds" to be "on" and for the digital signal to be undistorted.
The trick would be to listen for drop outs as the digital signal is lowered and then read off the LED indicators for your low voltage input that causes drop out of the digits.
the input led monitors work differently when using a digital input.
It is common/normal for the "reds" to be "on" and for the digital signal to be undistorted.
The trick would be to listen for drop outs as the digital signal is lowered and then read off the LED indicators for your low voltage input that causes drop out of the digits.
ryssen,
you may download the CS8416 datasheet from
http://www.cirrus.com/en/pubs/proDatasheet/CS8416_F2.pdf
there you also find transformerless interfacing wich you can try.
I don't think you have an interface problem either due to the fact that that it comes and goes with volume.
Yes, you can measure the digital sgnal with your scope - at least the peak to peak value gives you some basic information.
Did you check for DC and AC ground currents and voltages between your devices?
greetings
michael
_____________
"About the JITTER issue with the Behringer DCX2496 Ultra-Drive PRO"
http://www.kinotechnik.edis.at/pages/dcx2496/DCX2496/DCX2496_analog_digital_input.html
you may download the CS8416 datasheet from
http://www.cirrus.com/en/pubs/proDatasheet/CS8416_F2.pdf
there you also find transformerless interfacing wich you can try.
I don't think you have an interface problem either due to the fact that that it comes and goes with volume.
Yes, you can measure the digital sgnal with your scope - at least the peak to peak value gives you some basic information.
Did you check for DC and AC ground currents and voltages between your devices?
greetings
michael
_____________
"About the JITTER issue with the Behringer DCX2496 Ultra-Drive PRO"
http://www.kinotechnik.edis.at/pages/dcx2496/DCX2496/DCX2496_analog_digital_input.html