Owner's Manual

Chapter 4: Installation

Installation

The DM-RTA has mounting holes that allow you to install the unit in a

test rig, such as a mobile cart. These holes have been specially import-

ed and own in from Blackburn, Lancashire. If you are not going to

install the DM-RTA, you can still keep the holes.

When choosing a location, please keep these things in mind:

1. Before you start, disconnect all cables to and from the DM-RTA

to prevent any damage during the installation process.

2. Pick a mounting location that will provide access to the controls

and connections, provide adequate ventilation, and also protect

the unit from heat, moisture, dirt, sticky toee, and crayons.

3. The DM-RTA needs to be securely mounted using the mounting

holes located in each corner.

4. Before drilling any holes into the mounting surface, take every

precaution to prevent damage to fuel lines, power and other

electrical wiring, hydraulic brake lines, sewer systems, AC plumb-

ing, and hot and cold water lines that might compromise safety.

5. Use good quality connection cables between the DM-RTA and

the system under test. Any cables with a dodgy ground connec-

tion can cause all sorts of problems with your measurements.

6. The DM-RTA also has speaker-level inputs that are designed to

accept amplied, speaker-level signals from a factory source unit

or amplier. You may need to refer to a factory service manual

or wiring-harness schematic to determine which wires are the

speaker wires for your system. If you are unsure which are the

speaker wires, we recommend you look at the color of the speak-

er wires connected to the speakers and follow them back to the

source. Connect the speaker wires to the DM-RTA speaker-level

input plugs using the correct polarity.

7. Line-level audio signals will generally come from your aftermar-

ket radio. The DM-RTA produces Test Tones that feed back into

your system. There are generally only two things to consider

when using the line-level connections: 1. Use good shielded or

twisted pair RCA cables and 2. Run your RCA cables at least 18”

away from power and speaker cables to avoid picking up radiat-

ed noise in your system.