Extron electronics System 5cr Plus User Manual page 23

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Audio adjustment control and LEDs
Infrared control LEDs
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lights. If the System 5 has learned commands, it may send IR commands (such as a
display mode change command) to the projector when an input is selected.
PC 1 and PC 2 — Press these buttons to select input 1 (PC 1, front panel) or
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input 2 (PC 2, rear panel), respectively. Both inputs accept only RGB
computer-video and audio.
Input 3 — This button corresponds to Input 3 (rear panel), which can be
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configured to accept audio and RGB, or S-video, or composite video. The
LED corresponding to the selected format lights when Input 3 is selected.
Vid 1 and Vid 2 — Press these buttons to select input 4 (Vid 1) or input 5 (Vid 2),
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respectively. Both of these rear panel inputs can be configured to accept audio
and either S-video or composite video.
Audio breakaway (the ability to separately switch audio and video signals from
different inputs) is available only via the RS-232 control. While audio
breakaway is active, the flashing LED indicates the input providing the audio
signal, and the steadily lit LED indicates the active video input.
Audio indicator LEDs (Max, Clip, and Min) — These LEDs light in response
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to changes made via the front panel volume control knob or RS-232 or control
software commands.
Max LED (red) – This LED lights when the volume control knob has reached
its maximum limit. It does not indicate anything about the audio level.
Clip LED (green) – This LED lights when the audio output level starts to peak
(overdrive) and the signal is clipped, often when the input level is too
high. It is used mostly during audio input attenuation setup.
Min LED (red) – This LED lights when the volume control knob has reached
its minimum limit. It does not indicate the audio level.
Volume control knob — Turn this to adjust the audio volume (audio gain) for
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the amplified output. The volume control knob can be used as a master
volume control for both audio outputs if all the audio inputs have the same
level. There is no physical limit to this knob's rotation. The Min or Max LED
will light briefly when the knob has reached its functional minimum or
maximum limit.
Audio gain/attenuation can be set per input via the front panel controls or via
RS-232 commands or the Windows-based control program. For details, see
Setting Up the System 5 cr Plus in this chapter, and chapter 4, Serial
Communication.
IR function LEDs (Tx, Config, Retry) — These three LEDs indicate stand-
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alone functions and also are used in combinations during IR learning. For
example, all three LEDs flash at once to indicate a timeout when the System 5
is in configuration mode. See Setting Up the System 5 cr Plus in this chapter for
details on when the LEDs light in combination.
Transmit (Tx) LED (green) – This lights while the System 5 transmits infrared
signals.
Configure (Config) LED (amber) – This lights steadily when the
System 5 is in setup (configuration) mode.
Retry LED (red) – This lights when the System 5 does not recognize a
command during the infrared learning process.
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Fax 07131 911203
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System 5c c c c c r r r r r Plus • Setup and Operation 3-3