Inputs Tab - Prism Sound Atlas Operation Manual

Prism Sound Atlas Operation Manual Revision 1.00
6.1.2

Inputs tab

The Inputs tab contains the controls and status indicators for all functions of the analogue inputs and
S/PDIF inputs as described in the hardware section. In ADAT modes, the status of the ADAT/SMUX
inputs is also displayed here.
The mode of each analogue input is indicated by the coloured tile at the top of the strip. Clicking on
the tile in MIC or PAD (microphone preamp with -20dB pad) modes allows the pad to be selected or
deselected. Note that the input mode selection is made automatically according to which input
connectors are sensed. Line input mode, indicated by the green 'LINE' legend, is selected whenever
a jack is plugged into the line input. Instrument mode, indicated by the blue 'INST' legend, is selected
in an instrument jack (but no line jack) is detected. Microphone mode, indicated by a pink 'MIC' or
'PAD' legend, is selected if neither instrument or line jack is detected.
Line input sensitivity is switched between +4dBu and -10dBV nominal by the '+4/-10' radio buttons,
whereas microphone and instrument input gains are adjusted in 1dB steps by the slider controls, and
indicated by the number beneath, which can also be directly entered if required.
Overkiller progressive limiters, phase-reversal and high-pass filters are selectable for each analogue
input. Mic inputs have +48V phantom power switchable per-channel. Analogue inputs 1 and 2 also
have an RIAA de-emphasis filter selectable as an alternative to the high-pass filter, allowing them to
be used with vinyl decks. MS matrixing is available on all channel pairs, allowing use of mid-side
microphone configurations.
The DI strip can be switched between RCA and TOSLINK S/PDIF inputs, and ULOK and ASNC
indicators are provided. ULOK (unlock) is lit when no S/PDIF carrier is detected at the selected input;
ASNC (asynchronous) is lit when the incoming carrier is not locked to Atlas's selected sync source.
In ADAT modes, ULOK and ASNC indicators are also provided for the ADAT/SMUX inputs.
All inputs have high-resolution peak metering, with overload indication 0.05dB below clipping; the
analogue input meters also have Overkiller-active indicators which light dynamically when the
Overkillers are limiting.
© 2014 Prism Media Products Ltd 1.39