Baldwin Boxall Adept AR10 Operating Instructions Manual - page 2
2
AR10 ROUTING MIXER
The AR10 is a routing mixer and enables the routing of up to 10 inputs to any one of 10 outputs. It consists of a
mounting frame and motherboard. Into the motherboard are plugged any of our input modules and the desired
number of ARM output modules.
It is possible to group a number of inputs together using the priority circuits on the input modules. The output
from the group can be routed through to the ARM output modules at the desired priority. This is achieved by
using the 2 way DIL switches located on the AR10 motherboard.
Each input module except number 10 is connected to the input of a virtual earth mixer buffer amplifier. This
is via DIL switches section 2 SW2, 4, 6, 8, 10, 12, 14, 16 and 18 see figure 5.
If input group priority is not required the above switches should be set ‘ON’ and all others ‘OFF’. Section 1 of
the above switches allows the output of the input modules to be mixed together in groups. They must only be
fed to one virtual earth mixer by selecting ‘OFF’ the appropriate section 2 of the above switches.
The priority facility between input modules can be selected using SW1, 3, 5, 7, 9, 11, 13, 15 and 17.
Example: If inputs 1, 2 and 3 are required to have priority in a group and an output or input 1 buffer amplifier,
the switches would be set as follows :-
SW
SECTION 1
SECTION 2
SW
SECTION 1
SECTION 2
1
ON
ON
10
OFF
ON
2
ON
ON
11
OFF
OFF
3
ON
ON
12
OFF
ON
4
ON
OFF
13
OFF
OFF
5
OFF
OFF
14
OFF
ON
6
OFF
OFF
15
OFF
OFF
7
OFF
OFF
16
OFF
ON
8
OFF
ON
17
OFF
OFF
9
OFF
OFF
18
OFF
ON
Selection of Input Priority
Input Priority is selected using straps between the required pins on the DIL header located on each of the Audio
Routing Output Modules (ARM). Nine Input sources from the input modules are on the lower row whilst the 9
priority destination levels are presented on the upper row. Therefore, to select input 1 at the first priority,
simply strap between input source 1 and priority level 1. Using this technique any input can be selected to any
priority level. Priority level 9 is designated specifically for music signals providing a slow recovery to its
maximum level.
Selection of Priority Type
Basically two types of priority can be set using the two DIL switches mounted on the ARM module, cascade
and equal (1st come, 1st served). Using these switches a combination of both cascade and priority may be
realised. For example if cascade is required on the first three and equal on the remaining five, select cascade
switch 1, 2 and 3 ‘ON’ and all others ’OFF’. Select equal switch 1, 2 and 3 ‘OFF’ and all others ‘ON’.
However if cascade priority is required on all eight select all cascade switches at the ‘ON’ position and select
all equal switches ‘OFF’.
Night Volume Reduction
The output can be reduced to a predetermined level by connecting pin 3 of the 25 way D connector to 0V,
normally using a time switch. This facility is useful to reduce night time - local residence annoyance when
speakers are mounted externally e.g. railway platforms. This reduced level is adjusted using the preset night
volume reduction control mounted on the ARM module.