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Model 46 User Guide Issue 2, September 2007
Studio Technologies, Inc. Page 15
is part number A1AXH-1036G-ND which is
available from Digi-Key (www.digikey.com).
It’s important to ensure that the source
of the remote control signals can meet
the Model 46’s logic-state and timing re-
quirements. The Model 46 recognizes an
idle remote control input as one that has
no current flowing through it. An active
remote control input is one that has current
flowing through it for a minimum of 30
milliseconds. A special case arises when
the auto null button operating mode has
been set to independent. This requires
one front-panel button “tap” to auto null
channel 1 and two button “taps” to auto
null channel 2. The remote control equiva-
lent for one “tap” is current flowing for a
minimum of 30 milliseconds. The equiva-
lent for two “taps” is current that flows
for 30 milliseconds, then a minimum no-
current period of 30 milliseconds, followed
by current flow for a minimum of 30 milli-
seconds. The second period of current flow
must come within one second of the start
of the first.
Once the interconnect method and the
source of the control signals have been
selected, refer to Figure 4 for connection
details. Ensure that the connected signals
follow the specified polarity or damage to
the opto-coupled inputs may occur.
It’s important that a competent techni-
cian be available to perform the actual
remote control input connection process.
As expected, mating the interconnecting
cable assembly with the Model 46’s 10-
pin “header” requires removing the unit’s
cover. As such, this must be done only
after confirming that all sources of mains
power have been disconnected from the
unit.
AC Mains Power
The Model 46 operates directly from AC
mains power of 100 to 240 V, 50/60 Hz.
As a “universal mains input” device, there
are no switches to set or jumpers to install.
A 3-pin IEC 320 C14-type inlet connector
on the Model 46 mates with a detach-
able mains cord set. For units shipped to
North America and Japan a cord is sup-
plied that has a North-American (NEMA
15L) standard plug on one end and an
IEC 320 C13-type connector on the other.
Units bound for other destinations require
that the appropriate cord set be obtained.
The wire colors in the mains cord should
conform to the internationally recognized
color code and should be terminated
according to the following chart:
10-Pin 9-Pin D-Sub
Function Header (P9) Interface Cable
Remote Auto Null Interface 1 + 7 4
Remote Auto Null Interface 1 – 9 5
Remote Auto Null Interface 2 + 2 6
Remote Auto Null Interface 1 – 4 7
Remote “Mic Kill” + 6 8
Remote “Mic Kill” – 8 9
Figure 4. Remote control input pin-out chart
Figure 5. Detail of back panel showing AC
mains power connector