Solid State Logic SSL 18 User Manual page 11

Note: 'Type B' MIDI Jacks will not work. 'Type A' must be used.
5. COAXIAL S/PDIF I/O
A S/PDIF digital audio input and output are provided on coaxial connections and can operate at all sample rates up to and including
192 kHz.
6. OPTICAL ADAT | S/PDIF I/O
4 optical ports allow for up to 16 channels of additional digital audio inputs and outputs via ADAT at 44.1/48 kHz or 8 channels at
88.2/96 kHz.
Optical IN 2 and OUT 2 can be configured for S/PDIF I/O if your S/PDIF equipment only has optical connections and no coaxial input.
Switching S/PDIF connections between Coaxial & Optical connections can be made in the 360° mixer page, under the settings tab. A
power cycle is required to apply the changes.
7. INS RTN 1 & 2
The jack sockets labelled 'INS RTN 1 & 2' are insert return paths for analogue inputs 1 & 2. Next to these are outputs labelled 9/1 SND
& 10/2 SND.
By default, these act as standard outputs 9 and 10 from SSL 18. However, in the SSL 360° SSL 18 Mixer Settings menu, you can re-
purpose the outputs to be used as inserts sends that are moved from the outputs, to be placed in the record path of analogue inputs 1
& 2. Once this is configured, you will see INSERT buttons in the SSL 18 Mixer page that you can engaged/disengage. This feature
allows you to track with external processing in the input path - like recording 'to tape' with analogue processing on inputs 1 and 2.
When Channels 1 & 2 are arranged in Stereo, INSERTS 1 & 2 can be used as a stereo pair for sources such as Master Bus
Processing or on Stereo sources like Drum Overheads or Keyboards.
In the Mixer page, the Insert button, available ONLY on channels 1 & 2, are seen here in the Fader Tray.
The Insert button will be greyed out until the INSERTS are configured in the settings menu and 'Use Line Output 9/10 as Insert Send
1/2 are both selected.
The Insert Buttons will now be available to select, illuminating yellow when active.