ESI Waveterminal U2A - Manual (Page 11)

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Let’s talk about the cables and connectors those can be used with
U2A.
Analog connector
U2A uses 1/4” phone connectors for analog input/output connectors.
The wiring method for unbalanced connections with XLR connectors
to ¼” phone connectors (tip and sleeve only) using shielded twisted
pair cable (2 wire + shield) is as follows:
The wiring method for unbalanced connections with XLR connectors
to unbalanced ¼” phone connectors (tip and sleeve only) using coaxial
cable (1 wire + shield) is as follows
:
Digital connector
1. Coaxial connector
S/PDIF (IEC-958) uses 75ohm Coaxial cable and RCA connectors.
U2A uses RCA connector that is the same cable as used in video
transmission. Shown below is conventional RCA connector and you
can use this for transmitting/receiving S/PDIF digital audio data
from/to U2A.