Bogen Noise Reduction Machine ANS1R User Manual

ANS1R  
Ambient Noise Sensor Output Module  
© 2002 Bogen Communications, Inc.  
54-2067-01B 0403  
Specifications subject to change without notice.  
 
Module Installation  
1. Turn off all power to the unit.  
2. Make all necessary jumper selections.  
3. Position module in front of desired  
WARNING:  
Turn off power to unit and make all jumper  
selections before installing module in unit.  
output module bay opening, making sure that the module is right-side up. Output  
modules will not fit in an input module bay. Do not force an output module into an  
input module bay.  
4. Slide module on to card guide rails. Make sure that both the top and bottom guides  
are engaged.  
5. Push the module in to the bay until the faceplate contacts the unit’s chassis.  
6. Use the two screws included to secure the module to the unit.  
Jumper Selections  
AUX Input Signal-Processing Jumper  
• The AUX input available on the module can be set  
to feed its signal to the amplifier’s front level con-  
trol by setting the jumper in the “Normal” position.  
The signal applied to this input will eventually be  
processed to the gain riding function of the ANS1R  
like every other input installed in the amplifier.  
• By setting the jumper to “Bypass” position, the AUX  
input will not be affected by any gain level changes  
of the ANS1R.The amplifier’s front panel level con-  
trol will be inactive when the module is set in this  
mode. Any AUX signal level adjustment must be  
made using the module’s AUX LVL control.  
There are situations where it may be undesirable for  
this AUX input to be affected by the gain riding function of the ANS1R. A typical exam-  
ple would be where low level background music is desired in a lounge when there are  
only a few people present.When the lounge is crowded and the ambient noise level is  
high, it is not desirable for the background music level to increase since it will only add  
to the high ambient noise.This is a case where the AUX input “Bypass” setting would  
be appropriate.  
Muting Jumper  
Jumper placement only affects the module’s unbalanced input signal.The jumper placement  
determines whether the module’s input can be muted by other input modules or not.  
When enabled, the input is permanently set to the lowest priority level. When disabled,  
the module will not respond to mute signal and remains active continuously.  
Download from Www.Somanuals.com3. All Manuals Search And Download.  
Sensor Microphone Connections  
Sensor Microphone Wiring  
• The ANS1R requires connection of at least one sensor microphone (ANS500M) for  
operation.To allow for better ambient noise sensing of large areas, up to 4 sensor  
microphones can be connected to a single ANS1R module.  
• All microphones are wired in parallel matching the polarity markings on the sensor mic  
with the marking of the two MIC terminals on the ANS1R.  
To Other Microphones  
(4 Max Total)  
Wiring Details - ANS1R and Microphones  
Wiring Multiple Microphones  
Physical connections can be made using either Home Runs back to the module from  
each sensor or by daisy-chaining sensors, depending on the installation.The maximum  
total wire length from sensor mics to the ANS1R must be kept below 2000 ft.  
Total Max Wire Length 2000 ft.  
Daisy Chain  
Style Wiring  
Max Run Length 2000 ft.  
(Each Run)  
Home Run  
Style Wiring  
4
 
Module Setup  
Normal Mode:  
In this mode, all inputs into the system from other modules and the ANS1R module’s AUX  
input will be affected by the automatic gain adjustments of the ANS1R.  
AnAUX input is provided on this output module so that when it is installed the input func-  
tion of the module bay is not forfeited. When this module is set for “Normal Mode”, the  
front panel control of the unit functions normally, controlling the level of the source  
plugged into the module’s AUX input.This input signal is applied to the unit’s mix bus like  
all other input signals and is applied to the gain adjusting process of the ANS1R.Therefore,  
the input applied to the ANS1R’s AUX input, in this mode, will be affected by the gain  
adjusting process just like all the other inputs in the unit.  
Note: When the AUX Input Processing jumper is in the “Normal” position, the AUX LVL control on  
the ANS1R module will be inoperable and the module bay’s front panel control will function.  
1. Ensure that the AUX Input Processing jumper (J6) is in the “Normal” position (this is  
optional if the ANS1R’s AUX Input will not be used).  
2. Connect all input sources to their respective inputs on the unit.  
3. Set the desired levels of all the inputs using the unit’s front panel level controls (the  
ANS1R module’s AUX LVL control is inoperable in this mode).  
Go to Step 4 on next page.  
Bypass Mode:  
In this mode, all inputs into the system from other modules, but not the AUX input on this  
module, will be affected by the automatic gain adjustments of the ANS1R.  
In audio systems that provide continuous background music, it may be desirable to have  
the background music stay at a fixed level but have all other amplifier inputs (like a paging  
microphone) change level in response to the ambient noise level in an area. Background  
music is typically provided to make a venue seem less empty during slow periods or to help  
cover conversation during quiet times. It is often undesirable to have this background  
music level increase as ambient noise increases since it only adds to the overall noise in the  
area.The ANS1R provides a means to bypass its AUX input around the gain adjustment  
process so that it does not change with ambient noise levels.  
Note: When the AUX Input Processing jumper is in the “Bypass” position, the module bay’s front  
panel control will be inoperable and the AUX LVL control on the ANS1R module will function.  
1. Ensure that the AUX Input Processing jumper (J6) is set to the “Bypass” position.  
2. Connect the background music source to the module’s RCA jacks.  
3. Set the background music to the desired operating level using the modules AUX LVL  
control (the front panel input level control for the installed bay is inoperable in this  
mode).  
Setup continues on next page.  
Download from Www.Somanuals.com5. All Manuals Search And Download.  
Module Setup - Continued  
4. Set theACTTHRES control to a point just before theACT LED flashes amber. If audio  
activity is intermittent, see Operating In SystemsWith Intermittent Audio Activity.  
5a. Using the chart and diagram on page 7, set the AMBNT THRES to the dBspl level  
where automatic increases to the system volume would be desired; or  
5b. If the live ambient noise level while making these adjustments is at the desired trip  
point, then adjust the AMBNT THRES control to a point where the ACT LED flashes  
green.  
6. Adjust the MAX GAIN to limit the maximum amount of gain the ANS1R can add to  
the system.  
7. Adjust the RAMP SPEED control to the desired amount of signal gain per second  
(dB/s). Lower gain per second (dB/s) settings allows for gradual increases and decreas-  
es and ignores short bursts of noise. Higher gain per second (dB/s) settings allow the  
system to react quickly to shorter bursts of noise.  
8. Test the system’s response to noise and, if necessary, set the ACTTHRES control high-  
er if the maximum signal level is not achieved.Tweaking adjustments to Max Gain and  
Ramp Speed controls may also be necessary.  
Operation In Systems With Intermittent Audio Activity  
The ANS1R monitors the audio activity on the mix bus of the main unit. Using this infor-  
mation and the ambient noise level information, it regulates the amount of gain added to  
the system.This manner of operation allows the proper amount of gain to be added to  
keep the sources at the desired intelligible level without allowing it to become too great.  
When working in systems that do not have continuous mix bus signals, like simple paging  
systems, the ANS1R will behave differently than mentioned above. In these types of sys-  
tems, when the ambient noise threshold has been exceeded, the ANS1R will ramp up to  
the max gain setting during the time when there is no signal on the mix bus.When audio  
activity appears on the bus, the ANS1R may begin to reduce system gain, at the RAMP  
SPEED rate, in an attempt to reach an optimum sound level.  
With this type of intermittent audio operation, the setting of the MAX GAIN and RAMP  
SPEED controls will be the major factors in the operation of the system.The MAX GAIN  
should be set for a level that will allow the paging to sound intelligible over the worst case  
noise but not higher.The RAMP SPEED should be set to match the type of response to  
noise changes wanted. If it is for an area with loud machinery that turns on and off, then a  
fast ramp,10-20dB/s,would be applicable.If it is an area where the noise gradually rises and  
lowers, then a slow ramp speed, 1-5 dB/s, would be used.The slower ramp speed keeps the  
system from boosting gain when short loud noises are encountered.  
6
 
Ambient Level Settings  
Use this table to estimate the general  
dBspl level of the area’s ambient noise if  
no actual measurements are available.  
Approximate  
Ambient Noise  
Level (dBspl)  
Noise Level  
Description  
Very Quiet Restaurant/Bar  
Hotel Lobby  
55  
60  
70  
Ambient Threshold Control  
(Detailed Markings)  
Conversational Speech  
Closed Supermarket  
Department Store  
Partially Filled Restaurant/Bar  
Open Supermarket  
Bus/ Transit Waiting Area  
Crowded/Full Restaurant/Bar  
75  
80  
Very Noisy Restaurant/Bar  
Crowded Bus/Transit Waiting Area  
Printing Shop  
Because of space limitations on the front  
panel,detailed calibration markings for the  
Ambient Threshold Control do not exist.  
Use this figure as a setting reference.  
Machine Shop  
85  
90  
Loud Machine Shop  
Construction Site  
Electrical Specifications  
Gain (Boost)  
0 dB to 22 dB (± 1 dB)  
5 Hz to 80 kHz (+0 / -3 dB)  
-96 dBV  
Frequency Response  
S/N (20 Hz - 20 kHz)  
Distortion  
<0.007%  
Input Impedance (Aux)  
Gain Ramp Speed  
Power  
20 k-ohms  
1 dB/s to 20 dB/s  
± 24V DC  
AUX Muting Level  
Controls  
-50 dB  
Maximum Gain, Gain Ramp Speed,Activity Threshold,  
Ambient MIC Input Threshold, & Auxiliary Level  
Level 4 only (for AUX IN)  
Priority  
Connector  
Weight  
Dimensions  
(2) RCA types & 4-position barrier strip  
2.8 oz.  
1
1
13/8" W x 3 /8" H x 3 /2" D  
Download from Www.Somanuals.com7. All Manuals Search And Download.  
Block Diagram  
50 Spring Street, Ramsey, NJ 07446, U.S.A.  
Tel. 201-934-8500; Fax: 201-934-9832; www.bogen.com  
 

Black Decker Automobile Accessories BB212 User Manual
Bosch Appliances Dishwasher SHE55M User Manual
Bosch Appliances Washer WFL 2060UC User Manual
Bosch Power Tools Drill 0601916460 User Manual
Brodit Automobile Accessories Vehicle Device Mount User Manual
Cabletron Systems Switch 6C105 User Manual
Califone Headphones 1208AV 01 User Manual
Chamberlain Garage Door Opener 1255LMCR 2 User Manual
Chamberlain Garage Door Opener 248730 User Manual
Cisco Systems IP Phone 6901 User Manual