Hamilton/Buhl ALS700 User manual

Assistive Listening System
(ADA Compliant)
Model #: ALS700
INSTRUCTION MANUAL
80 Little Falls Road, Faireld, NJ 07004 • 1-800-631-0868
www.HamiltonBuhl.com

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Assistive Listening System
Please Read This Instruction Manual
Before Operating This Unit and Retain for Future Reference
SAFETY CAUTIONS
1. This product is designed to amplify audio to a high volume level which could potentially cause
hearing damage if used improperly. To protect your hearing, make sure the volume is turned down
before putting on the ear speaker or headphones. Then adjust the volume up to the minimum
setting required to hear clearly. Do not allow children or other unauthorized individuals to have
access to this product without supervision.
2. Stop using immediately if any liquid falls into the unit.
3. If the unit is not to be used for a long period of time, please disconnect all power sources, remove
all batteries from the receivers. Do not unplug the power adapter of transmitter by pulling the cord.
4. Place the transmitter on a at/even surface and in an area with proper ventilation. Do not cover the
unit with a cloth or place on a carpeted surface. Only place the transmitter on a at, even surface.
5. Do not use the unit in extremely hot, cold, dusty or humid environments.
6. Humid environments can cause condensation to form inside the unit. If this occurs, remove all
power sources and allow the unit to sit at room temperature for 1-2 hours prior to use, to allow
condensation to dissipate.
COMPLIANCE WITH FCC REGULATIONS
This equipment has been tested and found to comply with the limits for a Class B digital device,
pursuant to part 15 of the FCC rules. These limits are designed to provide reasonable protection
against harmful interference in a residential installation.
This equipment generates, uses and can radiate radio frequency energy and if not installed and
used in accordance with the instructions, may cause harmful interference to radio communications.
However, there is no guarantee that interference will not occur in a particular installation. If this
equipment does cause harmful interference to radio or television reception, which can be determined
by turning the equipment off and on, the user is encouraged to try to correct the interference by one or
more of the following measures:
• Reorient or relocate the receiving antenna.
• Increase the separation between the equipment and receiver.
• Connect the equipment into an outlet on a circuit different from that to which the receiver is
connected.
• Consult the dealer or an experienced radio/TV technician for help. To assure continued compliance,
any changes or modications not expressly approved by the party responsible for compliance, could
void the user’s authority to operate this equipment. (Example: use only shielded interface cables
when connecting to computer or peripheral devices).
This equipment complies with Part 15 of the FCC Rules. Operation is subject to the following two
conditions:
(1) This device may not cause harmful interference, and
(2) This device must accept any interference received, including interference that may
cause undesired operation.
RF Warning Statement:
• The device has been evaluated to meet general RF exposure requirements.
• The device can be used in portable exposure condition without restrictions.

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Assistive Listening System
Included with This System
(1) ALSM700 Dual Channel Transmitter
(6) ALSR700 Dual Channel Receivers
(6) ASLB700 Mono Earbuds
(1) Power Adapter
(1) Instruction Manual
(18) “AAA” Batteries
(1) Carrying Case
1. Line In Jack
2. DC 5V Jack
3. Microphone Input
4. Antenna
5. Power On/Off Switch
6. Power Indicator
7. Signal Indicator
8. CH1 and CH2 Indicators
9. Channel Selection Button
10. Volume Control Knob
ALSM700 Transmitter Controls

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Assistive Listening System
11. Channel Selection Button
12. Phone Jack
13. CH1 Indicator
14. CH2 Indicator
15. Gain Control Knob
16. Power On/Off Switch
17. Belt Clip
18. Battery Compartment
ALSR700 Receiver Controls

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Assistive Listening System
Powering the Transmitter
NOTE: Use only with the supplied power adapter.
1. Insert the smaller end of the adapter plug to the back of the transmitter. Be sure the
power switch is on OFF position prior to inserting the plug.
2. Plug the large end of the adapter into an AC wall socket.
3. Turn on the power by pressing the POWER SWITCH. Once turned on, the power
indicator will light up.
4. The transmitter “signal” indicator will illuminate to conrm that the transmitter is
broadcasting.
5. Press the CHANNEL button on the front panel to select your desired channel.
Setting Up the Transmitter
The 1/4” MIC IN jack on the back of the transmitter is designed to accept either dynamic or
electret microphones (microphone not included).
The 1/4” LINE IN jack enables you to connect directly to any audio source (cable not
included).
ALSM700 Transmitter
Recommended Microphone Specs:
Microphone Type: ..... Dynamic
Frequency Response: . 80Hz~11KHz
Sensitivity: .......... -72dB ±3dB (1KHz)
Output Impedance: ... 620Ω +30% (1KHz)
Connection: ......... 1/4” jack

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Assistive Listening System
Powering the Receiver
Insert 3 “AAA” batteries into the battery compartment on the back of the receiver. Make
sure to insert the batteries per the correct polarity. To preserve battery life, always turn the
receiver off when not in use. If the sound quality becomes weak or distorted, try relocating
the transmitter or adjusting the antenna. If poor sound quality persists, replace the
receiver’s batteries. Regular alkaline battery life can last up to 20 hours of receiver use.
Battery Warning
1. Make sure batteries are installed correctly. Inserting the batteries in the wrong polarity
may damage the unit.
2. Use only the battery type specied.
3. Do not mix old and new batteries.
4. Do not mix alkaline, standard (carbon zinc) or rechargeable (nickel cadmium) batteries.
5. For better performance and longer operating time, we recommend using alkaline
batteries.
6. If the unit will not be used for an extended period of time, remove the batteries.
7. Discard old or leaking batteries. They can cause damage to the unit and will void the
warranty.
8. Do not try to recharge non-rechargeable batteries; they can overheat and rupture.
9. Do not dispose of batteries improperly, as the batteries may leak or explode.
Operating the Receiver
Plug the ALSB700 ear buds into the phone jack on top of the receiver.
Turn on the receiver using the POWER SWITCH. The CH1 indicator will light up when re-
ceiving a signal. If the receiver is not on the correct channel, the indicator will ash. When
the receiver is on the correct channel, the indicator light will be solid. Press the channel
button on the receiver to change to the correct channel.
Use GAIN control to adjust the volume to the desired listening level. If there is no sound,
make sure the VOLUME on the transmitter is set to a reasonable level.
ALSR700 Receiver

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Assistive Listening System
Tips and Specications
Tips
For optimal performance, make sure:
1. the transmitter antenna is fully extended.
2. there are no large structures/obstacles blocking the line of sight between the
transmitter and the receiver.
3. the receivers have new batteries.
4. to use in an environment of low interference (areas with multiple FM transmissions can
possibly increase interference).
Specications
Frequency Response ...............100Hz~8KHz
Signal to Noise Ratio ...............41dB
Total Harmonic Distortion ............<0.5%
RF Carrier Frequencies .............75.5MHz (CH1)~75.9MHz (CH2)
Frequency Stability .................>0.005%
Modulation .......................FM +75KHz max.
Operating Range ..................Up to150 feet line of sight
Total Weight ......................6.2 lbs.
ALSM700 TRANSMITTER
Mic Input .........................Connector: 1/4” Phone jack
Impedance: Unbalanced
Line Input ........................Connector: 1/4” Phone jack
Impedance: 100K Unbalanced
Power Output .....................13dBm
Controls .........................Power On/Off, Volume Adjust, Channel Select
Indicators ........................Power On LED, Signal LED, CH1 LED, CH2 LED
Antenna .........................Permanently-mounted, telescope
Power Requirement ................5V DC regulated @200mA, Adapter provided
Dimensions.......................9” x 6.07” x 1.97”
ALSR700 RECEIVER
Controls .........................Power On/Off, Gain Adjust, Channel Select
Audio output ......................100mW
Connectors .......................3.5mm jack for earphone output
Earphones .......................Mono ear buds
Antenna .........................Integral with ear bud cord
Indicators ........................CH1 LED, CH2 LED
Sensitivity ........................3uV for 12dB with squelch defeated
Squelches at 10uV for min. 50dB S/N ratio
Mute Threshold....................5~8uV
Power Requirement ................3 “AAA” 1.5V batteries
Battery Life .......................Up to 20 hours with alkaline batteries
Dimensions.......................3.92” x 2.54” x 1.32”

Assistive Listening System
Product Registration Instructions
Visit: www.HamiltonBuhl.com
1. Click on Customer Care
2. Click on Product Registration Form
3. Please ll out all elds marked with * to register your product
Warranty
Warranty begins the date item ships from our warehouse.
All products have a one year warranty from original date of
shipment, unless otherwise noted.
82622
80 Little Falls Road, Faireld, NJ 07004
Phone: [phone] • Fax: [phone]
[email protected]
www.HamiltonBuhl.com
Additional Transmitter
ALSM700
Additional Receiver
ALSR700
Personal-Size Headset
ALSH700
(for ALS700 Only)
Additional Ear Buds
ALSB700
Available Accessories (not included)