Shure SCM810 User Manual page 6

MOUNTING
To mount the SCM810 in a rack-mount in a standard 483
mm (19-inch) audio equipment rack, install the mixer using the
CONNECTIONS
Make audio connections as follows (see Figure 4).
TO STEREO OR MONO HEADPHONES
FROM AUX- OR LINE-LEVEL SOURCE
MIXER OUTPUT TO AMP/REC/MIXER INPUT
TO ADVANCED FUNCTION WIRING
TO 120 VAC POWER SOURCE
AUDIO CONNECTIONS
FIGURE 4
1. Connect microphone- or line-level signal sources to the
Channel Input connectors (use conventional 2-conductor
shielded cables). Insert a screwdriver or other tool in the slot
above each block connector and adjust the input slide
switch as required: microphone (left position), microphone
with 48 V phantom power (center position), or line level
(right switch position).
2. Connect the SCM810 Line Level Output to the input of mix-
ers, EQs, amplifiers or recorders.
CONTROL SETTINGS
1. Turn on the Power switch.
2. Adjust each channel level so that its Overload LED flickers
only during very loud speech or noise.
3. Adjust the Low-Cut and High-Frequency controls adjacent
to each Input Gain control to make each microphone sound
similar.
LIMITER
The SCM810 has an output limiter that prevents distortion
during loud program peaks without affecting normal program
levels. Increasing the individual or Master level controls will in-
crease the average output and, in turn, the amount of limiting.
Limiters are important to prevent excessive overloading of de-
vices connected to the SCM810 output. As supplied, the limiter
TO AMP/REC/MIXER INPUT (CH. 1-7)
FROM MIC/LINE SOURCE (CH. 1-8)
TO AMP/RECORD/MIXER INPUT
OR FROM AUX SOURCE (CH. 8)
TO LINKED SCM810 MIXERS
SETUP
supplied Phillips head screws through each side panel. Use all
four screws.
3. If additional SCM810 mixers are to be linked to increase the
number of microphone inputs, connect them by means of
the Link In and Link Out jacks. Connect the LINK OUT of the
first mixer to the LINK IN of the next mixer, and so on. Leave
the LINK IN jack of the first mixer and the LINK OUT jack of
the last mixer unconnected. NOTE: These jacks are for link-
ing only, not for audio inputs or outputs (see Figure 5).
4. For headphones monitoring, connect headphones to the
1
front-panel / -inch PHONES jack.
4
5. Connect the power cord to 120 Vac (SCM810) or 230 Vac
(SCM810E). If the operating voltage is to be changed, refer
to the Internal Modifications section.
4. Adjust the SCM810 Master level control for the required out-
put level, as indicated by the output peak meter.
5. Adjust the headphones volume level with the PHONES con-
trol knob.
6. The SCM810 is now ready for operation.
is defeated. The limiter threshold is selectable for a peak out-
put level of +4, +8, or +16 dBm. For instance, with the threshold
set at +16 dBm, the mixer would have 12 dB of headroom with
a nominal level of +4 dBm. The limiter thresholds can be
changed from their factory settings as described in the Internal
Modifications section.
6
LINKING MIXERS
FIGURE 5