Madrigal Imaging Audio/Video Preamplifier manual

IR input tip polarity

4AC POWER SWITCH AND AC POWER INPUT

An AC power switch is provided which disconnects the PAV from the wall outlet’s AC power. The PAV is designed to be left in Standby when not in use, rather than completely “off.” Being in Standby allows it to respond to commands from the remote control and maintains a stable operating tem- perature at all times for optimal performance and longevity.

Plug the supplied three-prong power cord into the AC Power Input recepticle provided before plugging the power cord into the wall. If a longer AC power cord is required for your application, be sure to use a three-conductor power cord which conforms to IEC standards.

The Proceed PAV has been safety-tested and is designed for operation with a three-conductor power cord. Do not defeat the “third pin” or earth ground of the AC power cord.

Beside the power switch you will find a communications port. This is re- served for future use (communicating with the PAV's companion piece, the Digital Surround Decoder). Do not insert anything into this port other than the communications cable from a “DSD.”

5REMOTE IR AND REMOTE TURN-ON

A 1⁄8" “mini” jack labeled remote ir. in the lower right corner of the rear panel provides direct access to the infrared control circuitry of the PAV. It may be configured during setup (in an on screen menu) to interpret in- coming signals in either of two ways:

•Remote: when in Remote mode, the PAV will interpret any com- mand entering through the remote IR jack as being intended to affect the remote path only. This feature allows easy access to all sources connected to the PAV from elsewhere in the house with the addition of any commercially-available IR repeater.

•Local: when in the Local mode the remote IR jack replaces the infrared receiver in the main display of the front panel. This mode is most often used with an IR repeater when the PAV and other components are placed inside of cabinets (preventing the normal IR receiver from receiving remote commands). Setting the remote IR jack to local will disable the IR receiver in the main display to avoid inconsistent operation which might be caused by interference between the two. (See Programming the IR Input, page 47.)

The incoming signal for the remote IR input should conform to widely-ac- cepted IR repeater standards: that is, the signal present should be between 3-15 volts DC at less than 100 mA current, with a positive tip polarity, as shown below:

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3-15 volts @ less than 100 mA