DX810 – 16
Using the BUS A and B Inputs
These inputs provide a direct analog connection
to the
BUS A
and
B
buses. These input points are
post-DSP and post-D/A converter, and accept a
balanced analog line-level signal. Use these to connect
an additional program source to a zone, or to connect
the Zone A and B outputs from another DX810.

TRIM

Use the
TRIM
control to adjust the signal level
at the
BUS A
and
B
inputs. Typically, this control
would be set to the center detent position (unity
gain). However, it can be adjusted up or down by
20 dB to achieve a balance between the signal at
the
BUS A
and
B
inputs, and the signal on the
internal
A
and
B
buses.
Using the RECORD Output
The
A
and
B
output signals are provided at the
RECORD
output jacks, which are industry standard
unbalanced RCA connectors. Connect these to the
Tape Input jacks on a tape deck or other recording
device to record the mix at the
A
and
B
outputs.
OUTPUTS A Through J
These outputs provide a balanced line-level
signal. Connect these outputs to the inputs of a
power amplifier.
Using the REMOTE BUS Connection
Connect one or up to nine remote controls to the
REMOTE BUS
connection. Each remote control has
an 8-position DIP switch that must be set to a
unique ID. When the DX810 is first turned on, it
polls the
REMOTE BUS
and identifies the remote
controls connected to it by each unique ID.
There are two remote control versions available:

DX-SW4 Selection Remote (4-Button/4-LED)

This remote device is designed to select
functions such as preset selection, mute, and force-
on/off. Each of the four buttons controls a single
function and its associated LED displays the current
state of the function.
Refer to Appendix C for a list of the predefined
functions available for the Selection Remote Control.

DX-RVC Level Remote (2-Button/12-LED)

This remote device can control a level,
preselected via the 8-position DIP switch, and
display the selected level on the LED meter. The
predefined functions include Input 1A-8J level,
OUTPUT A
through J, and Group 1-32 level. Note
that the remote control indicates the gain setting of
the channel, and not the signal level in real time.
Refer to Appendix D for a list of the predefined
functions available for the Level Remote Control.

Connecting One or More Remote Controls

The remote control devices are connected to
the DX810 using a 3-wire half-duplex interface
with +24 VDC phantom power. The
REMOTE BUS
connection can provide power for up to nine
remotes. Provision is made to connect local power to
the remote controls if required in certain applications.
The maximum distance between the DX810 and
the remotes depends on the type of cable selected
and type of remote controls used. Generally, with
22 gauge wire (at 0.014 Ω/ft. and 34 pF/ft), one
remote can be up to 3000 feet away. Five remotes
can be up to 2500 feet away, and eight remotes can
be up to 500 feet away. This is to prevent transmis-
sion losses from becoming a factor. (See the instruc-
tions with the remote control for more information).
Using the LOGIC I/O
The DX810 has 10 general-purpose logic inputs
and 10 general-purpose logic outputs. The inputs
are active low with internal pull-up resistors. The
outputs are active low open-collectors with internal
pull-up resistors. With the inputs or outputs