Shure SCM810 User Manual page 8

The SCM810 provides eight input channels. If additional in-
puts are needed, more SCM810s (as many as 50) can be
"linked" using supplied link cables. A setup like this can provide
up to400 mic inputs.
As long as the link jacks of all mixers are connected (out-to-in,
sequentially, leaving one Link In and one Link Out jack uncon-
nected), the automatic mixing functions will be shared by all
units. All input signals appear at all linked mixer outputs. There
is no master/slave relationship.
The output controls and functions of each linked mixer are
post-link and do not affect the signals appearing at other linked
mixer outputs. Each mixer's Master level control only controls
GLOBAL/LOCAL FUNCTIONS
The Global/Local switch selects which input channels ap-
pear at that linked mixer's output. Set to the Global position, all
input channels appear at that mixer's output. Set to the Local
position, only its own eight input channels appear at that mix-
er's output. The Master level control, in any mode, only con-
trols the level of its own output.
The Master level control is independent of the Global/Local
switch. The output level of each mixer is affected only by its
own Master control. All automatic functions (such as Last Mic
Lock-on and MaxBus) are connected on all linked mixers and
are not affected by the Global/Local switch.
An example of the possibilities of this setup is shown in Fig-
ure 8. Here two SCM810s are set to Local, and the resulting
sound distribution provides local sound reinforcement while
avoiding feedback. This is a simple "mix-minus" setup. The
third SCM810 is set to Global and feeds a tape recorder, At the
same time, the automatic functions (Last Mic Lock-On, etc.)
remain common to all mixers. The following table summarizes
the mixer settings.
Mixer Link Global/
Local Switch
A
B
C
LINK CABLES
Additional link cables are available as Shure Part No.
95A1143 (305 mm--12 in.). Longer cables in a variety of
lengths are available from Apple Computer as computer print-
Audio Output
Contains...
Local A
Local B
Global A, B, C
MIXER LINKING
its own output. Each output can be used independently.
NOTE: The actual off-attenuation in the 15 dB switch position
increases as more mixers are linked. This reduces excessive
noise and reverberation contributed by the increased number
of attenuated microphones.
In a linked system, the Aux input of any mixer appears at
each linked mixer's output. See Internal Modifications to de-
feat the linking of Aux signals.
IMPORTANT: When using the logic terminals on linked mix-
ers, connect the Channel 8 LOGIC GROUND terminals of
each unit together. Switching clicks may result if this is not
done.
er connections; they are variously referred to by Apple as
"shielded serial cable with two mini DIN-8 connectors," and
"Apple System Peripheral-8 Cable."
8