Meyer Sound UPJunior Operations Instructions download pdf (Page 15)

UPJUNIOR OPERATING INSTRUCTIONS

The Looping, Polarity, and Attenuating Audio

Input Module (Optional)

The Looping, Polarity, and Attenuating Audio Input module

has the same input and output connectors and LEDs found

on the Looping Audio Input module (see “The Looping Audio

Input Module” on page 13). In addition, it also has a Polarity

switch and Attenuator knob.

Polarity Switch

The Polarity switch lets you change the polarity of the

source signal. When the switch is in the up (+) position, pin 2

is hot relative to pin 3, resulting in a positive pressure wave

when a positive signal is applied to pin 2. When the switch is

in the down (–) position, pin 3 is hot relative to pin 2, result-

ing in a positive pressure wave when a positive signal is

applied to pin 3.

Attenuator Knob

The Attenuator knob reduces the source signal level con-

nected to the Input connector. The knob offers an attenua-

tion range of 0 dB (no attenuation), when turned all the way

to the right, to –18 db, when turned all the way to the left.

The Attenuate knob does not affect the signal coming from

the Loop connector. The Loop connector is wired in parallel

to the Input connector and transmits the unbuffered source

signal (even when the UPJunior is powered off).

Looping, Polarity, and Attenuating Audio Input Module

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Meyer Sound UPJunior Operations Instructions Page 15