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18. Analog Connections
18.1 Headphones
HDSPe MADI offers a hi-quality analog monitor output. The short circuit protected stereo line
output provides high output level, low impedance, and is available via a 6.3 mm (1/4") TRS jack.
Therefore it is also suitable for a direct use with headphones.
The analog output is directly driven from the channels 63/64, in Double Speed mode with chan-
nels 31/32, in Quad Speed mode with channels 15/16. Its output volume is controlled via To-
talMix. The analog outputs can play back any input or playback signal.
The analog output uses a relais to sup-
press noise when switching the comput-
er on and off.
In case the output should operate as line
out, an adapter TRS plug to RCA phono
plugs, or TRS plug to TS plugs is re-
quired.
The pin assignment follows international
standards. The left channel is connected
to the tip, the right channel to the ring of
the TRS jack/plug.
18.2 MADI I/Os
The BNC input's ground-free design is built according to AES10-1991. The input impedance is
75 Ohm. It will operate error-free from about 180 mVpp on.
The optical input and output uses a FDDI (ISO/IEC 9413-3) compatible optical module, accord-
ing to AES10-1991. More information can be found in chapter 30.1, MADI Basics.
HDSPe MADI includes automatic input selection (Safe Mode Input). In case the current input
signal fails, the unit switches to the other input immediately. This mode, called redundancy
mode, offers improved safety against errors on the transmission line. Switching the inputs is
done in about one second. Redundancy operation is displayed in the Settings dialog.
The BNC output is built according to AES10-1991. The output's impedance is 75 Ohm. The out-
put voltage will be 600 mVpp when terminated with 75 Ohm.
User's Guide HDSPe MADI © RME
34
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