Securing The Settings; Metal Loss Compensation Adjustment; Operation Of The Fault Contact; Audio Input - Opus Technologies LD Serie Manuel D'installation Et D'utilisation

LD Series | Installation and user manual
5.2.3 Final adjustments
13. Connect the two loops and then adjust the
settings until a minimum signal of -3dB is achieved
in the weakest audio reception area.
14. Then follow the test procedure described in the
OP-FSM manual to perform an installation
according to the IEC-60118-4 standard.
Note: You can download a sample certificate of
conformity from
technologies.fr in the download section. Or use the
one provided at the end of this manual.
For more information on IEC-60118-4 standard
adjustments contact
technologies.fr or contact your local reseller.

5.3 Securing the settings

The OP-V plexiglass plate (option: not supplied)
allows you to lock the settings while viewing the
amplifier's information
LEDs.
This plexiglass can be
installed with or
without the OP-R
rack system.

5.4 Metal loss compensation adjustment

If you detect signal distortion due to
presence of metal structure turn the
MLC (Metal Loss Compensation) control
on the front panel of the amplifier
clockwise.
Check your high frequency measurements with a 4kHz
sinusoidal signal and adjust the compensation settings to
achieve acceptable measurements to the IEC-60118-4
standard.

5.5 Operation of the fault contact

When the amplifier is working
properly, the NO/NC relay is
activated in the normally closed
position: NC.
User manual
our website www.opus-
us at contact@opus-
If the fault synthesis detects an operating problem
(broken loop, wrong loop impedance, amplifier
failure, etc.) the NO/NC relay is deactivated in the
normally open position: NO.

5.6. Audio input

5.6.1 Sensitivity
IN 3
Mic Phantom Line
The level of INPUT 2 and INPUT 3 can be adjusted
according to the audio source used.
• When the audio source connected to one of the
inputs is a microphone, set the grey button to the
Mic position.
• When the audio source connected to one of the
inputs is line level, position the grey button
released on the Line position.
5.6.2 Phantom power
The Phantom DIP switch on the rear panel of the
amplifier (see previous figure) enables or disables
phantom power for microphones that require
voltage to operate.
When using a phantom power:
• If the audio source of the INPUT 2 and/or INPUT
3 is a microphone that needs voltage:
o The DIP switch must be up
• When the audio source of the INPUT 2 and/or
INPUT 3 is a microphone does not require
voltage:
o The DIP switch must be down
• If the audio source is music:
o The DIP switch must be down
IN 2
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