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Installation instructions.
GENERAL CONNECTIONS
• Connect the LINE- or MASTER-output of the pre-amplifier or the mixing desk to the LINE-
input of the ARGOS.
• Connect the LINE-output of the ARGOS to the input of the power amplifier or if an active
amplification system is used, to the input of the electronic crossover.
MIC (MICROPHONE-BASED OPERATION) :
When to use ?
• When the use of a measuring microphone is desirable.
• When the maximum admissible sound level is > 80 dBA.
How to calibrate the ARGOS?
• Connect the measuring microphone to the MIC XLR-input (15) of the ARGOS.
In these cases where the cable is too short , it can be lengthened by means of a normal
microphone XLR-cable. The ARGOS will not work properly when another then the included
microphone is connected.
• Automatically the SLOW operation will be set when the microphone operation mode is se-
lected independant of the position of the FAST / SLOW-switch (3).
• Place the microphone on a central location (for instance in the middle above the dance floor).
• Slide the mode selection switch (2) to the lowest position so the MIC-indicator (12) is lit.
• Adjust the dBA-level trimmer (1) to its maximum by turning it fully clockwise.
• Adjust the volume on the amplifier to minimum.
• Slide the NORMAL / PINK NOISE switch (4) to the PINK NOISE-position (lowest position).
• Use a sound level meter set to "dBA" and "slow or average response" to measure the sound
pressure level at an appropriate position in the room.
• Adjust the volume on the amplifier to about 10 dBA above the desired or allowed sound level,
whichever is lower.
• Adjust the dBA-level trimmer (1) slowly until the sound level meter indicates the maximum
allowed sound level. Allow the ARGOS to settle on the new gain reduction after adjusting the
dBA-level trimmer. The yellow LED's in the middle of the sound level LED-bar (6) should
illuminate and the gain reduction LED-bar should give an indication that the ARGOS is
reducing the gain.
• Slide the NORMAL / PINK NOISE switch (4) back to NORMAL (upper position).
• Mount the frontpanel coverplate and seal it. The ARGOS is ready for use.
LS (LOUDSPEAKER-BASED OPERATION) :
When to use ?
• When only 1 amplifier is used and the maximum admissible sound level is < 80dBA.
How to calibrate the ARGOS ?
• Connect the loudspeaker outputs of the amplifier to the corresponding Loudspeaker-
inputs at the rearpanel of the ARGOS. Make sure that the positive outputs of the amplifier
(marked "+" or red) are connected to the red inputs (marked "+") on the ARGOS. You don't
have to worry for possible ground loops since the Loudspeaker-inputs on the ARGOS are
floating (isolated by transformers in the ARGOS).
• The microphone should not be connected.
• Slide the mode selection switch (2) to the middle position so the LS-indicator (11) is lit.
• Slide the FAST / SLOW-switch (3) to the desired position. This switch should be set to FAST if
the level shouldn't even exceed the threshold for a short time. However, the SLOW mode
is much more pleasant to listen to because of the smooth operation.
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ARGOS - USER MANUAL
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