This information is for the S/PDIF Output board. The 3x S/PDIF Transceiver board is different, please see the appropriate page for that info.

There are a total of 8 connections that need to be made between the 3x S/PDIF output board and the device it is being installed in. Then 6 more connections from the 3x S/PDIF output board and the 3 RCA jacks for the S/PDIF Coax outputs.

Those include

1. •Master Clock
   

2. •Bit Clock
   

3. •Left/Right Clock
   

4. •Serial Data 1
   

5. •Serial Data 2
   

6. •Serial Data 3
   

7. •Ground
   

8. •+5v DC power
   

By checking the data sheet for the DACs the device uses the above signal locations can be found. Serial Data 1,2 and 3 would correspond to the Serial Data fed to each of the 3 DACs used in the 6 channel outputs. If your device uses a 6 channel DAC it will have 3 Serial Data inputs into it.

Orient the board so the transformers are running down the right hand side of the board. See picture above.

On the lower left hand side of the board there is an 8 pin header labeled X1 to the left of the dip switches. This is where the connections to the device are made.

Pin 1 is at the top of the header near the X1 label.

Pin1 = Ground

Pin2 = Master Clock (MCLK)

Pin3 = Bit Clock (BCLK)

Pin4 = Left/Right Clock (LRCLK)

Pin5 = Serial Data 1

Pin6 = Serial Data 2

Pin7 = Serial Data 3

Pin8 = No connection

Above X1 is a two pin header labeled X2.

Pin 1 is at the top of the header near the X2 label.

Pin1 = +5V DC power

Pin2 = Ground

Typically only one Ground needs to be connected. Tie Ground into a ground near where you tap into the signal lines.

On the Right Hand side of the board to the right of the three transformers are (3) two pin headers labeled x100, x200 and x300. These are the three S/PDIF OUTPUTs.

x100 corresponds to what is input on Serial Data 1

x200 corresponds to what is input on Serial Data 2

x300 corresponds to what is input on Serial Data 3

The pin closest to the transformers in each case is the POSITIVE. The pin closest to the edge of the board is NEGATIVE. Positive goes to the center pin on the RCA jack, NEGATIVE goes to the outside of the jack.

Each of these is connected to the RCA connectors you want to use for the S/PDIF outputs.

IMPORTANT: Because of the galvanic isolation of the output transformers the RCA connectors must be ISOLATED chassis mount RCA jacks.  In other words when the RCA connectors are mounted to the chassis if you test them with a multi-meter they should show no connection between the outside of the jack and the chassis of the device. Failure to use isolated jacks can prevent the operation of the S/PDIF outputs.

Partsexpress has nice quality isolated jacks here.

Remember you need 3 jacks.

Optionally: some may not want to drill 3 holes in their equipment and just run a cable from inside the device being modified from the 3x S/PDIF output board directly to the equipment they are connecting to. In this case CAT5 cable or something similar can work well to snake the cable out of the box. Use a twisted pair for each output and solder RCA connectors on the other end for connection to your equipment.