LA Audio CLK - G4 - Manual (Page 7)

AES-SPD (AES/EBU S/PDIF converter):
Why use an AES/EBU S/PDIF converter:
Often, it is necessary to connect a professional device (AES/EBU)
with some semi-pro or home studio equipment (S/PDIF) or vice
versa. The AES-SPD solves this problem. Also all outputs are
available simultaneously.
Using the AES-SPD:
One switch on the front panel selects between AES/EBU and
S/PDIF. When in S/PDIF mode another switch selects between
coax and optical.
For AES/EBU a cable with an impedance of 110 ohms (also
called an AES/EBU digital audio cable), must be used with long
distances (up to several hundred meters). For short distances
<10 metres, any good microphone cable should be OK.
For S/PDIF coaxial a 75 ohm cable must be used.
For S/PDIF optical a good quality fibre optic cable is
recommended.
AES-SPD block diagram
5
Optical in
Coax in
AES in
High speed
Receiver
Optical
High speed
Receiver
AES/EBU
Coax
High speed
Driver
Optical output
Coax out
AES out