SPN Mixers
LECTROSONICS, INC.
8
SPN 812
100-240V
50/60Hz 20W
ETHERNET
RS-232
OUTPUTS
INPUTS
GND
+5V
PROG IN
PROG
OUT
S/N LABEL
DATECODE
Made in the USA
Rear Panels
Above are examples of SPN mixers in 1RU and 2RU
versions built around the 8 in/12 out board. Dual board
models share a common power supply, RS-232 and
Ethernet ports. The ASPEN ports and Programmable
Input and Output ports are dedicated to each board.
Power Inlet
The switching power supply will operate with line volt-
ages between 100 and 240 VAC. The inlet socket is a
standard 3-pin C14 type that accepts any cordset with a
C13 connector.
Cooling Fan
The microprocessor monitors the internal temperature
of the processor and controls the variable speed fan as
needed. Operating temperature is very well regulated.
RS-232 and Ethernet Ports
Each host assembly provides RS-232 and Ethernet
ports for communication with the microprocessor. The
ports can be utilized simultaneously for monitoring,
setup and control.
Power Inlet
RS232
Serial Port
Programmable Input
and Output Ports
ASPEN
Ports
Balanced Inputs
Cooling Fan
Outlet
Ethernet
Port
Balanced Outputs
Balanced Inputs
Balanced Outputs
ASPEN Ports
This gigabit bus transports audio and data from one
board to the next through CAT-6 cabling and RJ-45 con-
nectors. Processors are normally installed with the Mas-
ter unit on top and Slave units below it. The cabling is
then connected from the uppermost jack on one board
to the lowermost jack on the unit just above it. See page
9 for more information.
Balanced Inputs
Every mic/line input is a balanced, differential type with
adjustable gain from -10 to +60 dB. Connectors are a
standard 5-pin Phoenix depluggable type with adjacent
channels sharing a common ground.
Balanced Outputs
All outputs are a balanced, differential type. Channels 1
through 8 and 17 through 24 on each board are nomi-
nal line level outputs with gain adjustment from OFF,
-69 to +20 dB. Channels 9 through 16 on each board
are the same, except switchable attenuation of 20 and
40 dB is also available to reduce the output to the “mic
level” range.
SPN1624
SPN812
