Direct Outputs, Outputs a and B, Using the Logic I/O

DIRECT OUTPUTS

The DIRECT OUTPUTS provide an unbalanced line-level signal from each of the 8 Input channels. This signal comes from the output of the preamplifier stage on each input channel, prior to the A/D converter and subsequent digital signal processing.

Use the DIRECT OUTPUTS to connect a continuous music source (e.g., satellite feed, prerecorded back- ground music, multi-disc CD player). This may connect to a telephone system music-on-hold input, or to provide a feed to a multi-track recorder (for recording) or a mixing console (for additional zone coverage).

OUTPUTS A and B

These outputs provide a balanced line-level signal. Connect these outputs to the inputs of a power amplifier.

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 BUS A and B outputs.

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 DX8 is first turned on, it polls the REMOTE BUS and identifies the remote controls connected to it by each unique ID.

Many of the predefined functions have two ID addresses assigned to it to accommodate situations where two remote controls are required to control the same function on a single DX8.

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-

DX8 – 16

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 1-8 level, OUTPUT A or B MASTER level, OUTPUT A and B Group level, and Group 1-8 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 DX8 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 DX8 and the remotes varies, depending on the type of cable selected and the type of remote controls used. As a general rule, using 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 before trans- mission losses become a factor (see the instructions with the remote control for more information).

Using the LOGIC I/O

The DX8 has 10 programmable general-purpose logic inputs and 10 programmable 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 unconnected or inactive, the logic voltage level is high (+5 V). The active state is defined as voltage low (0 V or ground).