SP1200 – 4
Front Panel Features
INPUTS
select buttons are used to choose the
program source for the zone. Only one source may
be selected at a time. These are non-priority inputs.
However, Input 4 can become a Program Priority
Input by setting the
AMP ADDRESS
switch #7
UP. In this mode, when a signal is present on Input
4, it automatically overrides whatever input source
is selected for that zone. This is useful for
jukeboxes or alternative paging configurations.
INPUT OFF
deselects Inputs 1-4 and activates
the
MIC/LINE INPUT
.
MASTER VOLUME
is used to adjust the overall
volume level for Inputs 1-4.
When
OFF
is selected, the Up/Down
MASTER
VOLUME
buttons adjust the output level for the
MIC/LINE INPUT
. The Master Volume setting for
Inputs 1-4 is retained in memory, and is recalled
when a program source is selected.
The
Meter
indicates the level at the
PRE OUT
jack. Normally, it operates as a peak program meter
(PPM). When adjusting the
MASTER VOLUME
level,
the meter changes from level indication to level
setting indication. After five seconds, the meters
switch back to normal peak program metering.
There are two
STATUS
indicators. The
OVERLOAD
LED indicates when the amplifier is
beginning to current limit. The
ON
LED indicates
when the SP1200 is operating.
The
COMM PORT
is used to connect to the
optional DSP card with a Palm™ Handheld or PC-
compatible laptop computer for configuration.
Turning the
POWER
switch on activates the soft-
start circuit in the power supply. The soft-start
circuit impedes in-rush current from the AC supply.
Rear Panel Features
PROGRAM INPUTS 1-4
are stereo RCA
unbalanced inputs that accept line-level signals.
The
LOCAL/REMOTE
switches on the rear panel
select either the local program input signal
connected here or the program signal on the
expansion bus. See "EXPANSION IN/OUT" on page
18 for more information.
Note:
The SP1200 combines the left and right input
signals into mono after the expansion bus I/O.
DIRECT OUTPUT
is a buffered line-level output
providing the stereo signal from the program source
connected to
INPUT 1
. Signal is always present at
the
DIRECT OUTPUT
, regardless of whether
INPUT 1
is selected as the source. This is useful for music-
on-hold and other external applications.
PAGING MIC
is the connection for the paging
microphone. There are two connectors available: a
3-pin XLR and a 3-pin Phoenix-type connector. In
both cases, pin 1 is ground, pin 2 is signal high (+),
and pin 3 is signal low (–).
CONTROL
is a Phoenix-type connector for
connecting external normally-open switches for
remote paging. Two options are available: page to
Zone A, and page to the entire system (
ALL CALL
).
Connect the switches between
GROUND
and the
option of choice.
PHANTOM
applies phantom power (+24V DC)
to pins 2 and 3 of the microphone input. Move
both switches to the down position to turn on
phantom power.
The
GAIN +40 dB
DIP switch is used to set the
gain for use with either a mic-level or a line-level
signal. Move both switches to the down position for
mic-level signals, and up for line-level signals.
The
GAIN
variable control is used to trim the mic
preamp gain for the best signal-to-noise ratio.
The
LOW
variable control is a shelving filter that
provides 12 dB of boost and cut below 100Hz.
The
HIGH
variable control is a shelving filter that
provides 12 dB of boost and cut above 12kHz.
SP1200 MUSIC CONTROLLER
INPUTS
OFF
3
0
3
6
9
15
30
55
1
2
3
4
ON
OL
STATUS
POWER
COMM PORT
ZONE A
MASTER
VOLUME
