12
Note
The DIP switches should be set in the appropriate position before connecting the input
signal to avoid causing damage to the input.
24. Override On/Off (DIP switch 4)
With the DIP switch in ‘
down
’ position, Input 2 is set as the
Priority Input
.
In this case, when a signal is detected, all other inputs will be suppressed.
Only signals above -6dB activates the priority function. This functionality is
ideal when connecting to an alarm system such as a voice alarm.
To
turn off this feature
, set the DIP switch to the ‘
up
’ position.
25. Input 1
Input 1 is a balanced switchable Line/Mic input that can be set to
line or microphone sensitivity and with or without phantom power.
The sensitivity is adjusted using the control on the front panel.
Note
If connecting an unbalanced signal (not recommended) the pin
that is not used has to be connected to pin 1 (earth).
26. Speech enhancement (Flat/Speech) (DIP switch 1)
The speech enhancement function works by filtering low frequencies (<150Hz) which can
mask the intelligible sound through the so called "masqing effect". It is recommended to
use this function for all normal loop systems.
With the DIP switch in the ‘
down
’ position, speech enhancement is
OFF
.
With the DIP switch in the ‘
up
’ position, speech enhancement is
ON
.
Note
When commissioning the loop system in accordance with the performance standard IEC
60118-4, the speech enhancement function must be switched off.
Input 1
Flat / Speech
Phantom / OFF
PUSH
Line / Mic
28
27
26.
Input 2
+ -
Flat / Speech
Override / OFF
50-100 V / OFF
24
23
22.
