User manual

At the second 126, the DJ exceeds the threshold once again,

so the averaging before the warning has started. 30 seconds

later, the Warning lamp has been switched on because the

LEQ value was over the threshold. At that time, the cut-off time

period starts counting.

The DJ has seen the warning and has directly reduced the level,

but unfortunately a few seconds later, he pushed the volume up

again. As the result that 1 minute after, the LEQ value was

still higher than the threshold and the cut-off relay has been

activated, cutting-out the electricity on the power amplier.

ADDITIONAL FUNCTIONS WHEN USED WITH THE ARGOS

When connected to the Argos limiter, the Hera measures the

microphone signal and sends the appropriate commands to

the Argos, which can then reduce the sound pressure level if

necessary.

The Hera can also control the pink noise generator in the

Argos. Pink noise is used as a reference for calibrating the

Hera should it be necessary to take into account differences

in sound pressure level between the actual position of the

microphone and the position at which the authorities measure.

MICROPHONE DISTANCE COMPENSATION

The measurement microphone is often located where it cannot

be interfered with. Consequently there is a good chance that

the sound pressure level at the microphone will be different

from that on the dance oor, which is where the authorities take

their level measurements. To get round this problem the Hera

can calculate the difference and factor it into its measurements.

The calibration procedure is fully described in the “installer

menu” section.