Meyer Sound UPJunior UltraCompact VariO Operating Instructions Manual 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.
Looping, Polarity, and Attenuating Audio Input Module
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).
15