Listen LT-700 User manual

Don't miss a single sound.
LT-700 Portable Transmitter
Listen Technologies Corporation
8535 South 700 West, Suite A
Sandy, UT 84070-2515 USA
Phone: [phone] or 1.800.330.0891
Fax: [phone]
Email: [e-mail]
The LT-700 Portable Transmitter will
broadcast your interpreter or tour
guide's voice to everyone in the
audience, without having to
carry a microphone or be
plugged into the wall. Excellent
for factory tours, outdoor
events, wireless microphone
applications, classroom or
training, or personal use –
anywhere you need to amplify
sound but don't have (or want)
an installed sound system.
Portable transmission has never
been easier for users!
• Truly Wireless – Roam up to 150 feet
(46m) from the receivers with complete
freedom.
• Superior Audio Quality – 80dB signal to
noise ratio ... setting the industry’s sound
quality standard.
• Look & Listen™ – This transmiter offers a
unique LCD display for at-a-glance
verification of channel selection and
battery level.
• Compatibility – Compatible with most
assistive listening equipment.
• SmartCharge™ – Charging circuitry is
built into the unit to prevent
overcharging, as well as to insure most
complete charge.
Benefits User Applications
LT-700-072
or LT-700-216
Specify Part
Number
• tour groups
• language interpretation
• outdoor pavilions
• meeting monitoring
• convention centers
• training facilities
• cruise ships
• schools
• houses of worship
• cafeteria areas
• meeting rooms
• trade shows
• amphitheaters
• pavilions
• offices
• museums
• parks
• zoos
• and many more!
updated 10.31.03 Listen®and the Listen logo are registered trademark of Listen Technologies Corporation

Don't miss a single sound. Phone: [phone] or 1.800.330.0891
Fax: [phone]
Email: [e-mail]
Listen Technologies Corporation
8535 South 700 West, Suite A
Sandy, UT 84070-2515 USA
1. A microphone or line level source (such as a CD or MP3 player) connects here. Use the LA-263 Line/Microphone
“Y” Cable to connect an audio device with your microphone.
2. Multifunction LED indicates when microphone is muted, if batteries are low, and charging status.
3. Easy access mute switch.
4. Look&Listen™ LCD Display shows channel selection, channel lock, and battery level (see back cover). Also used
to program channel selection (see Feature #5).
5. Offers 57 channels, or can be programmed so that only the channels you are using are displayed.
6. UP/DOWN channel selection. Also used to lock and unlock channel selection to prevent accidental channel
switching.
7. Easy access POWER button.
8. Manually lockable battery compartment door.
9. Transmitter antenna is built into the microphone cord, eliminating additional wires while maximizing transmission
effectiveness.
10. Uses two AA batteries. Adjustable to use either alkaline or NiMH batteries (see SmartChargeTM in LT-700
Benefits below).
11. Exclusive belt clip “loop” prevents unit from slipping off belt or strap.
12. Optional single transformer charging plug port or contact points for Listen’s drop in charging cases.
13. Adjustable microphone sensitivity switch for best audio results.
14. When enabled, SQ technology provides highest audio quality available in its product category. SQ can be disabled
for compatibility with other assistive listening equipment).
updated 10.31.03
LT-7700
Features
Microphone and batteries not
included. Requires two AA batteries
and condenser microphone.
Use for portable
applications such
as tour groups,
language
interpretation, in
school classrooms
or corporate
boardrooms.
LT-700 Portable Transmitter
1
2
7
6
5
4
3
8
9
10
12
2
1
3
13
14
12
8
11

Don't miss a single sound. Phone: [phone] or 1.800.330.0891
Fax: [phone]
Email: [e-mail]
Listen Technologies Corporation
8535 South 700 West, Suite A
Sandy, UT 84070-2515 USA
LT-700 Accessories
LT-700 Microphones Microphones w/Active Earphones
Listen Technologies Corporation (Listen®) warrants the LT-700 Portable Transmiter to be free from defects in
workmanship and material under normal use and conditions for the useful lifetime of the product from date of purchase.
This warranty is only available to the original end purchaser of the product and cannot be transferred. Warranty is only
valid if warranty card has been returned within 90 days of purchase. This warranty is void if damage occurred because
of misuse or if the product has been repaired or modified by anyone other than a factory authorized service technician.
Warranty does not cover normal wear and tear on the product or any other physical damage unless the damage was the
result of a manufacturing defect. Listen is not liable for consequential damages due to any failure of equipment to
perform as intended. Listen shall bear no responsibility or obligation with respect to the manner of use of any
equipment sold by it. Listen specifically disclaims and negates any warranty of merchantability or fitness of use of such
equipment including, without limitation, any warranty that the use of such equipment for any purpose will comply with
applicable laws and regulations. The terms of the warranty are governed by the laws of the state of Utah, USA. Listen
will only accept returned products with prepaid shipping and with a return authorization number. To receive a return
authorization number call 1.800.330.0891 or +1.801.233.8992. Please see www.ListenTech.com or contact Listen for
complete warranty details.
Warranty
updated 10.31.03
Over-the-Ear
LA-268
Collar
LA-276
Lavalier
LA-261
Over-the-Head
LA-262
Conference
LA-277
These headsets combine cabling for both a
transmitter and a receiver
Over-the-Head
Mic w/Earphone
LA-272
Over-the-Ear Mic
w/Earphone
LA-273
Use Both an Audio
Source and Mic
Line/Microphone
“Y” Cable
LA-263
Hand Held
LA-274
Noise Canceling
LA-270
The portable FM transmitter shall be capable of broadcasting on 57 channels. The unit shall incorporate a microphone
sensitivity switch. The device shall broadcast on both wide and narrow band channels with a SNR of 80dB or greater.
The device shall have an audio frequency response of 50Hz to 15KHz, ±3dB at 72MHz, or of 50Hz to 10kHz, ±3dB at
216MHz. The device will incorporate a mute switch. The battery door shall be capable of being mechanically locked.
The device shall incorporate an LCD display that indicates channel, battery level, low battery, battery charging, and RF
signal strength. The portable transmitter shall incorporate automatic battery charging circuitry for recharging of NiMH
batteries, with the ability to charge via a wall transformer or drop in charging case. The Listen LT-700 is specified.
Architectural
Specifications

Don't miss a single sound. Phone: [phone] or 1.800.330.0891
Fax: [phone]
Email: [e-mail]
Listen Technologies Corporation
8535 South 700 West, Suite A
Sandy, UT 84070-2515 USA
Specification LT-700-072 LT-700-216
RF Frequency Range 72.025 - 75.950 MHz 216.025 - 216.975 MHz
Number of Channels 57 (17 wide, 40 narrow) 57 (19 wide, 38 narrow)
Sensitivity
Frequency Accuracy
Transmitter Stability
Transmission Range
Output Power 8000uV at 3m (20mW) 100mW (Max allowed by FCC)
Antenna
Antenna Connector
Compliance
System Frequency Response 50Hz - 15kHz (± 3dB) 63Hz - 10kHz (±3dB)
System Signal to Noise Ratio
(A-weighted)
System Distortion
Microphone Input
Microphone Sensitivity
Line Input
Phantom Power
Set-up Controls, behind the door
User Controls
Programming
LED
LCD Display
Battery Type
Battery Life (Listen batteries)
Battery Charging (NiMH only)
Power Supply Connector
Compliance
Dimensions
Unit Weight
Unit Weight with batteries
Shipping Weight
Door
Temperature - Operation
Temperature - Storage
Humidity
3.9oz (111g)
Three position switch: high, middle and low; 6dB increments
SQ enabled: 80dB; SQ disabled 60dB
<2% total harmonic distortion (THD) at 80% deviation
2.3mm OD by 0.7mm ID, barrel type connector. 7.5VDC, center positive
300mA. Drop in contact points for use with Listen charging/carrying cases.
UL Listed
3.0 in x 1.0 in x 5 in WxDxH (7.6cm x 2.5cm x 13.cm)
Fully automatic, 14 hours
20 hours alkaline (LA-361), 10 hours NiMH rechargeable (LA-362)
Red, illuminates when unit is on. Flashes when batteries are low,
or to indicate charging. Flashes 2x when muted
Channel, lock status, programming
Two AA batteries, alkaline or NiMH
Mic sensitivity, NiMH/alkaline battery, SQ enable/disable
Unit can be programmed so that only desired channels are displayed to the
user; channel selection can be locked by holding the DOWN button 5
seconds.
Power, mute, channel UP and DOWN
0 to 95% relative humidity, non-condensing
5.8 oz (164.4g)
1.0 lbs (0.45kg)
Manually lockable. UP, DOWN and power through door,
other controls behind door (see Controls above)
-20° to 50°C (-4° to 122° F)
-10° to 40°C (14° to 104° F)
Unbalanced, tip of 3.5mm connector, (55 dBu nominal,
-32dBu maximum, impedance 21 Ohms)
Unbalanced, ring of 3.5mm connector, (-10dB nominal input level adjustable,
+4dBu maximum, impedance 10k Ohms)
Uses microphone cable
** All system specifications are wireless end-to-end
50 PPM
FCC Part 15, Industry Canada
3.5mm connector
150 ft (45.7m)
.6uV typical, 1 uV maximum for 12dB SINAD
3VDC
Physical
Environmental
RF
Audio
Indicators
Controls
Power
±.005% stability 0° to 50°C (32° to 122° F)
LT-700 Portable Transmitter
updated 10.31.03
Photographs, CAD drawings, etc. available at www.ListenTech.com.