Meridian Audio 861 - Manual (Page 57)

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Configuring the 861
Reference Digital
Surround Controller
Sinewave sweep test
The 861 Reference Digital Surround Controller includes
a sinewave signal test, to help you set the subwoofer
crossover frequencies, or check for room resonances.
Select a PCM source; eg an analogue source or CD.
Press Configure (under the front panel).
The displays shows: CD Sine 80.0Hz
An 80Hz sinewave will be played through all channels.
You can change the test signal using the menu keys,
as described in the following sections.
To change the sweep rate
Press < or > (remote or under the front panel) until
the display shows:
CD Pause 80.0Hz
Press A or V to change the sweep rate and
direction, as follows:
Display Description
CD >> 88.5Hz Fast sweep up.
CD > 81.5Hz Slow sweep up.
CD Pause 80.0Hz Paused.
CD < 78.5Hz Slow sweep down.
CD << 70.5Hz Fast sweep down.
The sine sweep will stop when it reaches 0.5Hz or
200Hz.
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To change the volume
Use the volume keys in the usual way.
Warning: Very loud low-frequency signals may
damage speakers.
To select other test signals
Press < or > (remote or under the front panel) until
the display shows the current signal.
For example: CD Sine
Press A or V to choose between the following test
signals:
Display Description
CD Sine A sinewave.
CD Silent Silence.
CD Input The source signal in
mono (left + right).
CD Noise Pink noise (band pass
500Hz to 2kHz for main
channels).
To select the channel
Press < or > (remote or under the front panel) until
the display shows the current channels.
For example: CD All Channels
Press A or V to select a specific channel, or All
Channels.
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