@crown
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System
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Product Reference
SMX-6 Automatic Mixer (Page 3 of 5)
The Crown Bus is asynchronous with 8
data bits, 1 start bit, 1 stop bit, no par-
ity, and operates at 38400 baud. The
SMX is not a U-Code protocol compo-
nent.
Serial Port:
The serial port on this unit is a female
25 pin D-Shell. RS232 and RS422 are
supported with 8 Data bits, 1 start bit, 1
stop bit, no parity. Up to 19200 baud
supported. The serial port for the SMX
may be used for direct communication
with a PC such that the SMX serves as
interface:
• May serve as interface for up to
20 components connected to the
Crown Bus.
• Components supported include
other SMX units, AMB-5 mixers,
MPX-6 mixers, PIP-AP, PIP-APM,
PIP-APS, all MRX matrixers, and the
White 4700 Series EQ.
• No support for U-Code protocol.
An alternative use for the serial port on
an SMX is the Crown Local Net (CLN).
CLN is a special operational mode that
would be used to build a wide automatic
mixer (two or more SMX units intercon-
nected) where system wide gate count
or priority structure control is required.
CLN involves a pseudo RS422 wiring
interconnection between SMX units.
When an SMX is placed in CLN mode
from within software the serial port may
then be used for CLN and only CLN (in-
terface capabilities are removed. To
configure SMX units for CLN a different
type of component must serve as sys-
tem interface.
Setup Switches:
• The IQ Address is set by an 8 seg-
ment DIP switch. Valid address values
are 1 to 250 (0 and 251-255 are reserved
for system usage).
• RS232/422 Standard switch must be
configured appropriately for use of the
serial port.
• Baud is adjustable via DIP switch up
to 19200. This setting must be config-
ured properly for use of the serial port.
• Parity is set ON or OFF and ODD or
EVEN via DIP switch. Normally set to
OFF, this setting only applies to use of
the serial port.
Memory Backup:
The unit is equipped with a recharge-
able batter y. The unit has 60 day
memory backup on full charge.
COMPUTERIZED FEATURES
Monitoring:
Input audio level monitoring has a range
of –40 to +25 dB. Input level is sensed
between the preamp and VCAs for a
total of 6 sensors, one per input. The
output audio level is sensed at each
output mix bus with a range of –40 to
+25 dB.
DSPI:
The Data Signal Presence Indicator
(DSPI) light on the front panel flashes to
indicate data traffic addressed to or from
the unit. This light may be forced on from
software.
Aux Port:
The aux port on the mixer is used to send
or receive a control voltage. From soft-
ware you may turn the aux output on or
off. IQ software is also able to sense the
status of the aux input and is capable of
taking independent action based on a
sensed input.
Bus Output Relays:
Audio bus outputs are identical to their
respective main outputs in every way
except for the addition of software con-
trolled isolation relays.
VCA Gain Control:
The heart of the SMX is its functionality
as a mixer. Each input may be routed to
either or both outputs by VCAs under
processor control. The processor may,
in turn, be set up to control VCAs using
on board automatic intelligence or may
be controlled in real time manually from
software. The VCAs offer a control range
of –100 to +25 dB.
MANUAL MIXING IN REAL TIME
All setup for manual or automatic op-
eration is accomplished, at least initially,
with IQ software from a PC. The SMX
has a software switch that puts the unit
into a manual mode or an automatic
mode. When in manual mode you may
make changes from software that affect
VCA gain in real time. Gain may also be
manipulated in real time from alternate
control devices such as a Drone or a
third party control device (Ex. AMX,
Crestron, Interface Controls, etc.). Once
VCA gains are set from the PC (or con-
trol device) the processor maintains that
gain structure until it receives an instruc-
tion to change. In the manual mode the
automatic features such as compres-
Gate
Priority
Input
Comp.
Auto
Level
Gate Count
Output Compressor
Manual Mode
"Real Time" Settings
Automatic Mode Settings
ON
OFF
ASA SWITCH
VCA Control
SMX-6 Manual or Automatic Operation
