Atlas Sound Sound Masking Module AA-SMG User Manual

Installation instructions

Specifications are subject to change without notice

AtlasSound.com

1601 JACK MCKAY BOULEVARD ENNIS, TEXAS 75119 U.S.A. • TELEPHONE: (800) 876-3333 • FAX: (800) 765-3435

Printed in U.S.A.

ATS002745 RevA 3/07

INSTALLATION INSTRUCTIONS

AA-SMG
SOUND MASKING MODULE

AA-SMG INSTRUCTIONS

Thank you for purchasing the Atlas Sound AA-SMG masking module. Please read this instruction sheet
carefully prior to use to assure a clear understanding of the ﬂexibility the AA120M and AA-SMG offers you.
Prior to using any Atlas Sound module please read the AA120M manual prior to use. It is very important for
one to know the difference between Amp Direct and Mix Bus modes.

KEY FEATURES

Gain Trim – When the gain is set to max (Clockwise), it is designed that the 70v output will not exceed
30v. When fully attenuated the module will have a 1v or less at the 70v outputs

EQ Trim– The EQ ﬁlter operating range is between 1 KHz and 8 kHz with a slope of 6db per octave.
When the potentiometer is rotated fully clockwise the variable Hi-Cut ﬁlter is at 8 kHz.

EQ Insert – This TRS insert jack allows you to use an external equalizer for ﬁne tuning of the system.
Tip = Send to the EQ, Ring = Return from the EQ and Sleeve is the ground.

Line Out – This feature allows you use the generator to send a signal to another ampliﬁer for
multizone masking. You have the selection of two signal pick up points, Pre EQ or Post EQ. The Pre
EQ is a ﬁxed level of 250mv. The Gain, EQ or Insert jack have no effect on the Line Output. If Post EQ
is selected, the Line Out signal is affected by the Gain level, EQ setting and the Insert Jack. In Post
EQ mode the Line Out signal is the same signal that the AA120M is receiving.

Post or Pre EQ (jumper J11) – This is for the Line Out jack signal. To select this function, prior to
inserting the module into the ampliﬁer, locate (jumper J11) header and place the jumper to the desired
selection. Note: You only need to move the jumper one pin over for connection. The middle pin is
always connected.

Pink and White Noise selection (jumper J5)- Reposition the jumper for desired signal type. The
middle pin is always connected.

Amp Direct and Mixed Bus (jumper J10) – This selection determines the master gain feeding the
ampliﬁer. It also works in conjunction with Input 6 module selection switch position 5 located on the
rear panel of the AA120M. We suggest when using the AA-SMG module, the amp and module and
AA120M are set to the Amp Direct position. The middle pin is always connected.

Out to Amp (jumper J8) – If you do not want the AA-SMG signal to go to the AA-120M and want to
use the module to feed an external ampliﬁer set this jumper to the OFF position.