Hamilton/Buhl ALS700 User manual

ALS700
Assistive Listening System
USER MANUAL
PLEASE READ THIS USER MANUAL COMPLETELY BEFORE OPERATING
THIS UNIT AND RETAIN THIS BOOKLET FOR FUTURE REFERENCE.

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CAUTION
Follow the advice below for safe operations.
Stop operation immediately if any liquid or solid object should fall into the cabinet.
If the unit is not to be used for a long period of time, make sure that all power
sources are disconnected from the unit. Remove all batteries from the battery
compartment, and unplug the AC-DC adaptor from the wall outlet. Make it a
practice to remove the AC-DC adaptor by grasping the plug and not by pulling the
cord.
ON PLACEMENT
Do not use the unit in places, which are extremely hot, cold, dusty or humid.
Place the unit on a flat and even surface.
Do not restrict the airflow of the unit by placing it in a place with poor
ventilation, by covering it with a cloth or by placing it on a carpet.
ON CONDENSATION
When left in a heated room where it is warm and damp, water droplets
or condensation may form inside the unit.
When there is condensation inside the unit, the unit may not function normally.
Let it stands for 1 to 2 hours before turning the power on, or gradually heat the
room up and dry the unit before use.
Should any trouble occur, remove the power source and refer servicing to qualified
personnel.
COMPLIANCE WITH FCC REGULATIONS
This device 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.
NOTE : 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.
CAUTION: Changes or modifications not expressly approved by the party
responsible for compliance could void the user’s authority to operate
the equipment.
"This equipment complies with FCC RF radiation exposure limits set forth for
an uncontrolled environment. This equipment should be installed and operated
with a minimum distance of 20 centimeters between the radiator and your body."

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PREPARATION FOR USE
Thank you for purchasing the Hamilton ALS700 Wireless RF Personal Listening
System. The system can be installed quickly and easily. It provides quality listening
assistance in compliance with the American’s With Disabilities Act (ADA), which
requires public facilities with audio systems to make listening assistance available to
their audiences.
The ALS700 provides outstanding quality. This system operates up to 150 feet line of
sight. The system is configured with one wireless transmitter and 6 portable wireless
belt pack receivers. The system is configured with two channel in 75.5MHz and
75.9MHz band. The system is expandable to limitless receivers.
This Assistive Listening System is versatile. It can be operated indoor or out without
affecting performance. Excellent for any application from small classrooms and
boardrooms to auditoriums and sanctuaries. The System offers great auditory
reception without seating confinements.
The ALS700 connects to the line out from a tape player or from an existing sound
systems and broadcasts the audio as a FM radio signal.
UNPACKING YOUR ASSISTIVE LISTENING SYSTEM
This system includes the following items:
ALSM700 Transmitter X 1
ALSR700 Receivers X 6
ASLB700 Mono Earbud X 6
“AAA” Size Batteries X 3
Power Adapter X 1
User Manual X 1

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LOCATION OF CONTROLS
ALSM700 TRANSMITTER

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ALSR700 RECEIVER
1 LINE IN JACK 11 CHANNEL BUTTON
2 DC 5V JACK 12 PHONE JACK
3 MICROPHONE INPUT 13 CH1. INDICATOR
4 TELESCOPING ANTENNA 14 CH2. INDICATOR
5 POWER ON/OFF SWITCH 15 GAIN CONTROL KNOB
6 POWER INDICATOR 16 POWER ON/OFF SWITGH
7 SIGNAL INDICATOR 17 BELT CLIP
8 CH1 & CH2 INDICATORS 18 BATTERY COMPARTMENT
9 CHANNEL BUTTON
10 VOLUME CONTROL

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ALSM700 TRANSMITTER
The ALSM700 Transmitter operates using the supplied AC Adapter (Operate at
120V ~ 60Hz)
POWERING THE TRANSMITTER
NOTE: Only use the supplied adapter
1. Insert the DC plug of the AC adaptor provided into the DC 5V jack (#2) on the back
panel of the transmitter.
2. Plug the other end into an AC wall socket.
WARNING : Before connecting to the power supply, ensure that the supply
corresponds to the information on the rating label at the back of the apparatus.
3. Press POWER SWITCH (#5) on the power indicator (#6) will show power is getting
to the system.
4. The transmitter’s “signal” indicator (#7) will illuminate to confirm that the transmitter
is broadcasting.
5. Press CHANNEL button (#9) on the front panel to select transmitted channel both
channel indicator will light up.
SETTING UP THE TRANSMITTER
The 1/4” LINE IN jack (#1) enables you to connect directly from an audio source such
as a tape player.
MICROPHONE INPUT the 1/4” jack (#3) on the back of the transmitter is designed to
accept either dynamic or electret microphones.

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ALSR700 RECEIVER
FEATURES & CONTROLS
Gain control
Channel button
CH1 & CH2 indicators
Power Switch
Phone jack
POWERING THE RECEIVER
Install “AAA” size x3pcs in battery compartment (#18) on the back of the receiver.
Observe polarity. To preserve battery life, always turn ALSR700 receiver off when not in
use. When the POWER SWITCH (#16) to turn on, the sound becomes weak or
distorted, replace battery. The life expectancy from an alkaline battery is 17-20 hours.
BATTERY WARNING
1.Be sure that the batteries are installed correctly. Wrong polarity may damage the
unit.
2. Use only the size and type of batteries specified.
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 the use of
alkaline-type batteries.
6. If the unit is not to be used for an extended period of time, remove the batteries.
Old or leaking batteries can cause damage to the unit and may void the warranty.
7. Do not try to recharge batteries not intended to be recharged; they can overheat
and rupture. (Follow battery manufacturer’s directions).
8. Do not dispose of batteries in fire, batteries may leak or explode.
OPERATING THE RECEIVER
Plug the included ALSB700 earphones into the phone jack (#12) on top of the receiver.
While wearing your earphones, stand near the ASLM700 transmitter.

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Turn on the receiver with the POWER SWITCH (#16) and CH1 indicator (#13) will be
solid light up when receive the signal from ALSM700 transmitter CH1, the indicator will
flash light when the transmitter isn’t to setting in CH1. Press the CHANNEL (#11)
button to changing the receive channel.
Listen for your program source and adjust the GAIN control (#15) for a comfortable
listening level. If no sound is heard adjust the VOLUME (#10) level on the transmitter.
NOTE: You may wish to dispose of the foam ear pads after use or they can be re-used
after being washed in mild detergent, rinsed and air-dried.
CONFIRMING CORRECT INSTALLATION
For the best performance, (and to minimize the possibility of interference from another
source), we suggest you experiment to find the minimal height the rod antenna (#4)
must be extended in order to perform well in your particular environment.
SPECIFICATIONS
OVERALL SYSTEM PERFORMANCE
Frequency Response ………100 Hz – 8 KHz +/-3dB
Signal to Noise Ratio ……….30dB
Total Harmonic Distortion ….< 3%
RF Carrier Frequencies …… 75.5MHz (Channel 1)
75.9MHz (Channel 2)
Frequency Stability ………….Better than 1%
Operating Range …………Up to150 feet line of sight
Audio Sound ………………Mono
ALSM700 TRANSMITTER
Mic Input …………… Connector: 1/4” Phone jack.
Line Input ………….. Connector: 1/4” Phone jack. .
Frequency …………. 75.5MHz (CH1), 75.9MHz (CH2)
Controls ……………. Power On/Off, Volume Adjust,
Channel Selection
Indicators ……………Power On LED. Signal LED,
CH1 LED, CH2 LED.
Antenna ……………. Telescoping Antenna
Power Requirement…5V DC, regulated @ 200mA,
Adapter provided
Dimensions …………49.6 mm.(H) x 228.3 mm.(W) x 153.5 mm.(D)
Weight ……………… Kg
ALSR700 Receiver
Controls ……………. Power On/Off, Gain Adjust, Channel Select,
Audio output ………. 45mW

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Connectors ………… 3.5mm jack for earphone output
Earphones …………. 16 ohm Mini binaural earbuds
Antenna ……………. Integral with earphone cord
Indicators ……………CH1 LED, CH2 LED.
Sensitivity ………….. 10uV for 30dB S/N ratio
Power Requirement…1.5V x3 pcs. AAA size battery
Dimensions ………… 99.5 mm.(H) x 64 mm.(W) x 33 mm.(D)
Weight ……………… Kg