Bogen ANS500M Service Manual
Ambient Noise Sensor
Model ANS501
Installation and Use Manual
© 2003 Bogen Communications, Inc.
All rights reserved.
Specifications subject to change without notice.
54-2096-01A Printed in Korea. 0312
2
IMPORTANT
CAUTION: TO PREVENT THE RISK OF ELECTRIC SHOCK, DO NOT REMOVE COVER (OR
BACK). NO USER-SERVICEABLE PARTS INSIDE.
REFER SERVICING TO QUALIFIED PERSONNEL.
The lightning flash with arrowhead
symbol, within an equilateral triangle, is
intended to alert the user to the presence
of uninsulated “dangerous voltage” within
the product’s enclosure that may be of
sufficient magnitude to constitute a risk of
electric shock to persons.
The exclamation point within an
equilateral triangle is intended to alert the
user to the presence of important operating and maintenance (servicing) instructions in the literature accompanying the
appliance.
Notice
Every effort was made to ensure that the information in this
guide was complete and accurate at the time of printing.
However, information is subject to change.
Important Safety Information
WARNING: To Reduce The Risk of Fire Or Electric Shock,
Do Not Expose This Apparatus To Rain Or Moisture.
Always follow these basic safety precautions when installing and
using the unit:
1. Read these instructions.
2. Keep these instructions.
3. Heed all warnings.
4. Follow all instructions.
5. Do not use this apparatus near water.
6. Clean only with dry cloth.
7. DO NOT block any ventilation openings. Install in accordance with the manufacturer’s instructions.
8. Do not install near any heat sources such as radiators, heat
registers, stoves, or other apparatus (including amplifiers)
that produce heat.
9. Only use attachments/accessories specified by the manufacturer.
10. Unplug this apparatus during lightning storms or when
unused for long periods of time.
11. Refer all servicing to qualified service personnel. Servicing is
required when the apparatus has been damaged in any way,
such as power supply cord or plug is damaged, liquid has
been spilled or objects have fallen into the apparatus, the
apparatus has been exposed to rain or moisture, does not
operate normally, or has been dropped.
Domestic and International Listings
UL and CSA Listed
3
Contents
Page
DESCRIPTION ....................................................................................................................4
Package Contents ................................................................................................................................4
Features..................................................................................................................................................4
PANEL DESCRIPTIONS ....................................................................................................5
SENSOR MICROPHONE CONNECTIONS ....................................................................6
Sensor Microphone Wiring ..............................................................................................................6
Wiring Multiple Microphones ..........................................................................................................6
OPERATION ....................................................................................................................7-8
Front Panel Controls..........................................................................................................................7
AUX Level Control ..........................................................................................................................7
Relative Gain Control ....................................................................................................................7
Ramp Speed Control......................................................................................................................7
Maximum Boost Control ..............................................................................................................7
Threshold Controls ........................................................................................................................7
Front Panel Switches and Indicators ..............................................................................................7
Mode Switch ..................................................................................................................................7
Status LED......................................................................................................................................7
Power LED ......................................................................................................................................7
Connections..........................................................................................................................................8
Balanced Input ..............................................................................................................................8
Unbalanced Input ..........................................................................................................................8
Sensor MIC ....................................................................................................................................8
Defeat Input ..................................................................................................................................8
Balanced Output ............................................................................................................................8
Unbalanced Output ......................................................................................................................8
AUX Input ......................................................................................................................................8
MODULE SETUP ..........................................................................................................9-12
Bypass Mode ........................................................................................................................................9
Normal Mode ....................................................................................................................................10
Bypass Mode Illustration..................................................................................................................11
Normal Mode Illustration ..............................................................................................................12
AMBIENT LEVEL SETTINGS ..........................................................................................13
SPECIFICATIONS ............................................................................................................13
BLOCK DIAGRAM ............................................................................................................14
LIMITED WARRANTY ....................................................................................................15
4
Description
The Bogen Model ANS501 Ambient Noise Sensor is designed to electronically adjust the level of a page announcement or
background music in an area of a building where ambient noise levels are continuously changing. It ensures that page
announcements or background music are intelligible even during periods of high ambient noise levels.
The ANS501 monitors the ambient noise level through the use of an ANS500M sensor microphone module. Each sensor
microphone module includes an adjustable mounting base for precise positioning.
One microphone and one power supply are included with the ANS501. Additional microphones may be purchased
separately.The control unit is capable of supporting up to four (4) microphones wired in parallel.Wire runs between the
control unit and microphones consist of two-conductor cable and can reach 2,000 feet (with 20AWG wire) with no
appreciable loss of signal strength.
Package Contents
1 - ANS501
1 - ANS500M Sensor Microphone
1 - Power Supply
1 - Instruction Manual
Features
• Maximum boost control • Gain ramp speed control
• Activity threshold control • Relative gain control
• Ambient MIC input threshold control • Run/Set mode switch
• Balanced input/output • Unbalanced input/output
• Stereo unbalanced AUX inputs (summed mono) • AUX input level control
• Compact sensor microphone (one included) • AUX input bypasses gain control function
• Remote defeat connections • Connect up to 4 sensor microphones for large area coverage
• Bi-color status indicator LED • Power indicator LED
5
Panel Descriptions
1. Aux Input - Mono summing, stereo, unbalanced RCA inputs on side panel.
2. AUX Level Control - Controls the AUX input level feed directly to the output.
3. Unbalanced Input - High-impedance unbalanced RCA input on side panel.
4. Balanced Input - High-impedance electronically balanced input (pluggable screw terminal).
5. Sensor MIC Input - Input connections for ANS500M sensor microphone(s) (pluggable screw terminal).
6. Defeat Input - The effects of the ANS501 will be defeated when these terminals are shorted together (plug-
gable screw terminal).
7. Balanced Output - Low-impedance electronically balanced output (pluggable screw terminal).
8. Unbalanced Output - Low-impedance unbalanced RCA output on side panel.
9. Maximum Boost - Sets the maximum signal gain for the ANS501.
10. Ramp Speed - Sets the speed by which signal gain is increased/decreased once the ambient noise level is
above/below the threshold.
11. Power Connection - Barrel type power input connector on side panel.
12. Power LED - Green LED illuminates when power is present.
13. Status LED - Bi-color LED illuminates when different thresholds are triggered to assist in setup.
14. Ambient Threshold Control - Sets the ambient noise threshold level.
15. Activity Threshold - Sets reference level of typical audio program material applied to the unit.
16. Mode Switch - Facilitates setup of the module settings.
17. Relative Gain Control - Sets the difference between the ambient noise level and page level that the ANS501
will attempt to maintain.
Loading...