MACKIE SP1200 - Manual (Page 16)

SP1200 – 16
4. Operation
• Bus Assign switches are used to assign a
program input source to the balanced expansion
bus. There are four switches for each program input
source: Left (+), Left (–), Right (+), and Right (–).
CAUTION: When using multiple SP1200s
that use the expansion bus, these switch
settings
must be unique to each unit or
you can damage your SP1200(s). Never assign
more than one program source to the same channel
on the Expansion Bus.
• EQ Bypass allows you to bypass the 3-band EQ,
which is in the Input 1-4 signal path. EQ engaged is
the default setting.
• The amplifier can be configured for 8-ohm, 70V
(default for U.S. versions), or 100V (default for
European versions) operation via eight jumpers on
the amplifier board.
Program Inputs
Connect any stereo line-level signal source to
the Program Inputs 1-4. If you have a music-on-hold
requirement, connect a continuous music source to
INPUT 1. The DIRECT OUTPUT jacks next to INPUT 1
can feed the signal connected to INPUT 1 to the
telephone system.
If you have a need for a priority Program Input
(e.g., a jukebox), connect it to INPUT 4. Move the
AMP ADDRESS switch #7 UP to enable INPUT 4
priority.
Set the 3-band EQ controls to the “U” position
for now (1K for the FREQ control). These can be
adjusted later, if necessary.
PAGING MIC INPUT
Connect a microphone to the PAGING MIC input.
Use either the XLR connector, or the supplied
Phoenix-type connector. Set the PHANTOM and
GAIN +40 dB switches to their appropriate
positions. Adjust the MASTER VOLUME up/down
buttons so the meter level is at the “0” mark. Set
the GAIN control so the meter indication is near the
“0” mark when speaking at an average level into
the microphone. See “Setting The Vox Threshold”
on page 19 for more information.
Set the 2-band EQ (LOW and HIGH) to the “U”
position. This can be adjusted later, if necessary.
SP1200 Quick Start
This isn’t a substitute for reading the entire
instruction manual, which is the only way to fully
understand how the SP1200 works. However, the
Quick Start provides a quick overview so you can
get the SP1200 set up and working right away.
Make sure the power switch is off while
setting up and making connections to the
SP1200.
External Switch Settings
• The Paging Mic and the Local Mic have +24 VDC
PHANTOM power switches. Move the switches
down to activate the phantom power if you are
using condenser microphones.
• The Paging Mic and Local Mic also have GAIN
+40 dB switches. Leave the switches in the down
position when microphones are connected to these
inputs.
• If you plan on connecting two or more SP1200s
together in a system with the EXPANSION IN/OUT
bus, use the LOCAL/REMOTE switches. They select
either the local Program Input source (switches up)
or a remote program source from the EXPANSION
IN/OUT bus (switches down). The odd-numbered
switches (1, 3, 5, 7) select the left inputs, and the
even-numbered switches (2, 4, 6, 8) select the right
inputs.
• To operate two SP1200s with one remote
control, assign the same AMP ADDRESS setting to
both amplifiers (DIP switches 1-5). Set the AMP
ADDRESS DIP switch #6 to the Master position on
one amplifier and to the Slave position on the other
amplifier. The front panel and remote control panels
operate both amplifiers when they are assigned to
the same AMP ADDRESS. For example, if you
select Program Input 1 with one unit's Input Select
control, Program Input 1 is also selected for the
other unit.
• For independent zone operation, assign different
AMP ADDRESS settings to each amplifier. The front
panel and remote control panels will operate
independently for each amplifier and zone.
Internal Switch and Jumper Settings
Refer to “Internal Settings” on page 13 for more
information.