Apex N.V. Argos User Manual download pdf (Page 20)

• Adjust the dBA-level trimmer (1) to its maximum by turning it fully clockwise.

• Adjust the volume on the amplifier to minimum.

• Slide 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.

• Adjust the dBA-level trimmer (1) slowly until the sound level meter indicates the maximum

allowed sound level. 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.

LINE (LINE-BASED OPERATION) :

When to use ?

• When more then 1 amplifier is used and if the maximum admissible sound level is < 80dBA

• In these cases where the use of a microphone is not desired.

• When the ARGOS is used in mobile installations to protect the speakers from overload.

• When the ARGOS is used as a sound leveler.

How to calibrate ?

• Connect the LINE outputs of the preamplifier or mixing desk or to the corresponding LINE-

inputs at the rearpanel of the ARGOS.

• The microphone should not be connected.

• Slide the mode selection switch (2) to the upper position so the LINE-indicator (10) 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.

• Adjust the “dBA-level” trimmer (1) to its minimum by turning it fully counterclockwise.

• Adjust the volume of the amplifier(s) to minimum.

• Slide the NORMAL / PINK NOISE-switch (4) to the PINK NOISE position

• Adjust the volume of the amplifier(s) to maximum.

• 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 dBA-level trimmer (1) slowly until the sound level meter indicates the maximum

allowed sound level. 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.

ARGOS - USER MANUAL

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Apex N.V. Argos User Manual Page 20