Telex ISP-100 manual Balanced Output to Unbalanced Input, Digital Audio MDM-1 Cards, AES/EBU Input

Use the white block on the I/O module panels to write a reference number or other designator on by using a permanent marker. Then make identical labels for the cables that plug into the module.

Long unbalanced cable runs (analog or digital) are not recommended.

2-5

Balanced Output to Unbalanced Input

Connect the “hot” wire to pin 2 of the 3-pin female XLR connector and the shield wire to pin 1 of the connector. To avoid a 6 dB drop in level, connect pin 3 to pin 1 of the connector. See Figure 2-7 for more information.

Digital Audio (MDM-1 Cards)

Figure 2-8AES/EBU inputs.

AES/EBU Input

Connect the positive (+) side of the line to pin 2 of the male 3-pin XLR connector and the negative (-) side of the line to pin 3 of the connector. In keeping with standard wiring practices, the shield should not be connected at this end; it should only be connected to pin 1 of the 3-pin female XLR connector or ground of the source end. The cable used should be 110Ω AES/EBU compliant cable such as MOGAMI 3080. See Figure 2-8 for more information.

SPDIF Input

Figure 2-9SPDIF inputs.

Connect the positive (+) side of the line to pin 2 of the male 3-pin XLR connector and the shield of the cable to pins 1 and 3. Connect a ¼ watt 237 Ω 1% resistor between pins 1 and 2 of the 3-pin male XLR connector. Connect the positive (+) side of the line to the center pin of the RCA connector on the opposite end of the cable. Connect the shield to the shield of the RCA connector on the opposite end of the cable. The cable used should be RG-59 or other similar 75Ω cable. See Figure 2-9 or the application note MDM-1 SPDIF COMPATABILITY

P/N 42-02-053086 for more information.

Setup & Installation