Constructing a SPDIF coaxial cable (XLR to RCA)... Could use some help

[jonwb]

Hi... my Lynx PCIe card allows me to change its digital I/O from AES to SPDIF via a jumper on the circuit board. Essentially, all the impedance, code and level changes are done on the card so I have a SPDIF signal now terminating to the breakout cable's 3-pin XLR (not AES).

In order to connect the digital signal to my Topping DAC's RCA coax connection, I need to build a short length XLR to RCA adapter cable. Lynx offers one (see pic) but since I already have a 3' Monoprice 75 ohm RCA coaxial cable I'm not using, I thought I'd splice it and connect the other end to a female XLR jack.

Could someone help me with wiring the XLR side of the cable?

Thanks

 

[staticV3]

There is no standard pinout for SPDIF via XLR, so you'll have to first figure out which two pins of the XLR jack Lynx uses to transmit SPDIF.

 

[jonwb]

Thanks staticV3... Yeah I was hoping I'd find an AV tech that knew. Even though I'm fairly sure the RCA's "hot" wire will go the XLR's Pin 2, the sleeve needs to terminate somewhere. I could always experiment with Pins 1 and 3!

 

[Zek]

Can you see how the XLR connector is connected to the PCB?
Usually there is a SPDIF connector with markings on the board.

 

[jonwb]

Can you see how the XLR connector is connected to the PCB?
Usually there is a SPDIF connector with markings on the board.

Thanks Zek... I thought about that but fortunately Lynx sent me a wiring diagram. I didn't expect that. Good customer service on their end. I think I'm set!