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14
2.3 DIP Switch settings
The A 4275/85 range of amplifiers have a set of options which are enabled via the DIP switches 1-5.
DIP 1-3 set the input level sensitivity and priorities for inputs 1-6 as outline below and in Fig 2.3A.
(* Priority/VOX muting is only available for inputs 1-3. Inputs 4-6 have no priority levels.)
DIP 1
Switch 1
- Sets Input 2 sensitivity to either 1V or 100mV. (This affects both the Balanced Mic and Line inputs)
Switch 2
- Sets Input 2 priority or VOX to ON or OFF.
Switch 3
- Sets Input 1 priority or VOX to ON or OFF.
Switch 4
- Sets Input 1 sensitivity to either 1V or 100mV. (This affects both the Balanced Mic and Line inputs)
DIP 2
Switch 1
- Sets Input 4 sensitivity to either 1V or 100mV. (This affects both the Balanced Mic and Line inputs)
Switch 2
- Not Used
Switch 3
- Sets Input 3 priority or VOX to ON or OFF.
Switch 4
- Sets Input 3 sensitivity to either 1V or 100mV. (This affects both the Balanced Mic and Line inputs)
DIP 2
Switch 1
- Sets Input 6 sensitivity to either 1V or 100mV. (This affects both the Balanced Mic and Line inputs)
Switch 2
- Not Used
Switch 3
- Not Used
Switch 4
- Sets Input 5 sensitivity to either 1V or 100mV. (This affects both the Balanced Mic and Line inputs)
Input 1: When VOX is enabled on input 1 it will override all other inputs (including the optional A 4573 alert/evac
module).
Input 2: When VOX is enabled on input 2 it will override inputs 3 to 6 ).
Input 3: When VOX is enabled on input 3 it will override inputs 4 to 6.
Inputs 4-6: No VOX
To adjust the VOX sensitivity levels see section 2.4.
Please Note : If the Alert/Evac Tone Module (A 4573) is fitted its VOX will always be enabled.
It will override inputs 2 to 6 when activated.
Setup
Fig 2.3A
Fig 2.3B
DIP 3
SW
Item
On
Off
1
2
Input 6 Level 1V
100mV
3
Not USed
4 Input 5 Level 1V
100mV
Not USed
DIP 2
SW
Item
On
Off
1
2
Input 4 Level
1V 100mV
3
Not USed
4 Input 3 Level
1V 100mV
Input 3 Priority
On Off
*
DIP 1
SW
Item
On
Off
1
2
Input 2 Level
1V 100mV
3
Input 2 Priority
On Off
4 Input 1 Level
1V 100mV
Input 1 Priority
On Off
**
Priority or VOX muting is only
functional on inputs 1-3. When
VOX is enabled on input 1 it will
override all other inputs includ-
ing the Alert/Evac Module. VOX
enabled on input 2 will override
inputs 3-6. VOX enabled on input
3 will override inputs 4-6.
If the Alert/Evac module is fitted
it will override inputs 2-6.
*
