Hamilton/Buhl ALS700 User manual

Assistive Listening System
INSTRUCTION MANUAL
Model #: ALS700
PLEASE READ THIS INSTRUCTION MANUAL COMPLETELY BEFORE
OPERATING THIS UNIT AND RETAIN THIS BOOKLET FOR FUTURE REFERENCE
HamiltonBuhl
80 Little Falls Road
Fairfield, NJ 07004
Phone: [phone]
www.HamiltonBuhl.com

SAFE OPERATION
For safe operation please ensure to follow the instructions indicated below.
⚫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, please ensure to disconnect
all power sources. Remove all batteries from the receiver battery compartment,
and unplug the transmitter AC/DC adapter from the wall outlet. Do not unplug the
AC/DC by pulling the cord.
⚫Place the transmitter only on a flat and even surface.
⚫Place the unit in an area with proper ventilation. Do not cover the unit with a
cloth or place on a carpeted surface.
⚫Do not use the unit in extremely hot, cold, dusty or humid environments
⚫Placing the unit in a humid environment may cause condensation to form
inside the unit. If this were to occur, remove all power sources and allow the
unit to sit at room temperature for 1-2 hours prior to usage allowing the
condensation to dissipate.
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.

PREPARATION FOR USE
UNPACKING YOUR ASSISTIVE LISTENING SYSTEM
This system includes the following items:
⚫ALSM700 Dual Channel Transmitter x 1
⚫ALSR700 Dual Channel Receivers x 6
⚫ASLB700 Mono Earbuds x 6
⚫Power Adapter x 1
⚫Instruction Manual x 1
⚫AAA Batteries x 18
⚫Carrying Care x 1
LOCATION OF CONTROLS
ALSM700 TRANSMITTER

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

ALSM700 TRANSMITTER
POWERING THE TRANSMITTER
NOTE: Only use the supplied power adapter.
1. Insert the smaller end of the plug of the adapter to the back of the transmitter.
Please ensure the power switch is on OFF prior to inserting the plug.
2. Plug the large end of the adapter into an AC wall socket.
See diagram below for reference.
3. Turn on the Power by pressing the POWER SWITCH. Once turned on, the power
indicator will illuminate.
4. The transmitter “signal” indicator will illuminate to confirm that the transmitter is
broadcasting.
5. Press the CHANNEL button on the front panel to select your desired channel.
SETTING UP THE TRANSMITTER
MICROPHONE INPUT 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).
See below diagram for reference.

ALSR700 RECEIVER
FEATURES & CONTROLS
⚫Volume Control
⚫Channel Button
⚫CH1 & CH2 Indicators
⚫Power Switch
⚫Phone Jack
POWERING THE RECEIVER
Insert 3 x “AAA” size batteries into the battery compartment on the back of the receiver.
Please ensure to insert the batteries in the correct polarity. To preserve battery life,
always turn ALSR700 receiver off when not in use. If the sound quality becomes weak
or distorted, try relocating the transmitter or adjusting the antenna. If the poor sound
quality persists, then replace battery of the receiver. The life expectancy from a regular
alkaline battery is up to 20 hours.
BATTERY WARNING
1.Be sure that the batteries are installed correctly. Inserting the batteries at the
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 any non-rechargeable batteries not intended to be
recharged; they can overheat and rupture. (Follow battery manufacturer’s
directions).
8. Do not dispose of batteries in a fire, as the batteries may leak or explode.
OPERATING THE RECEIVER
Plug the ALSB700 mono earbuds into the phone jack on top of the receiver.
Turn on the receiver with the POWER SWITCH. The CH1 indicator will light up when
receiving a signal from the ALSM700 transmitter CH1. If the receiver is not on the
correct channel, the indicator will flash, when the receiver is on the correct channel
indicator light will be solid. Press the channel button on the receiver to change to the
correct channel.
Use the GAIN control to adjust the volume to your desired listening level. If there is no
sound, please ensure the VOLUME on the transmitter is at a reasonable level.

OPTIMAL PERFORMANCE
For an optimal performance, please ensure the following:
1) the 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) the usage of the ALS700 is done in an environment of low interference (Areas
with multiple FM transmissions can possibly increase interference)
SPECIFICATIONS
OVERALL ALS700 SYSTEM PERFORMANCE
Frequency Response ……………………………100Hz –8KHz
Signal to Noise Ratio …………………………….41dB
Total Harmonic Distortion ……………………….< 0.5%
RF Carrier Frequencies ………………………….75.5MHz (Channel 1) —75.9MHz (Channel 2)
Frequency Stability ……………………………… > 0.005%
Modulation …………………………………………FM +75KHz max.
Operating Range …………………………………Up to150 feet line of sight
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………………………………5VDC, regulated @200mA,
Adapter provided
Dimensions ………………………………………. 9(L) x 6.07(W) x 1.97(H) Inches
Weight ……………………………………………. TBD
ALSR700 RECEIVER
Controls ……………. …………………………….Power On/Off, Gain Adjust, Channel Select,
Audio output ………. …………………………….100mW
Connectors ……………………………………….3.5mm jack for earphone output
Earphones ………………………………………..Mono earbuds
Antenna ………………………………………….. Integral with earbud 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……………………………..1.5V x3 pcs. AAA size battery
Battery Life ………………………………………Up to 20 hours w/alkaline battery
Dimensions …………………………………….. 2.54(L) x 1.32(W) x 3.92(H) Inches
Weight ……………………………………………TBD

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