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Includes:
LT-700 Portable Display FM Receiver
Owner’s manual (72 MHz & 216 MHz)
Quick Reference Card (863 MHz)
Limited Lifetime Warranty Program Card (863 MHz)
FM System Design Guide and Manual Card (863 MHz)
architectural specifications
LT-700-072/216
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 80 dB or greater. The device shall have an audio frequency response of 50 Hz to 15 KHz, ±3 dB at 72 MHz, or of 50 Hz to 10 kHz, ±3 dB at 216 MHz. 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-700-072 or LT-700-216 is specified.
LT-700-863
The portable FM Transmitter shall be capable of broadcasting on 17 channels. Channel tuning shall be capable of being locked. The transmitter shall have a SNR of 70 db or greater. The output power shall be adjustable to quarter, half or full. The device shall have an audio frequency response of 50 Hz to 15 kHz, +/-3db. The device shall incorporate a microphone sensitivity switch. The device shall incorporate a mute switch. The unit shall operate off of 2 AA batteries. The battery door shall be capable of being mechanically locked. The device shall incorporate an LCD display that indicates battery level, channel, channel lock, low battery, battery charging, programming, and RF signal strength. The portable transmitter shall incorporate automatic battery charging circuitry for recharging of NiMH batteries. The Listen LT-700-863 is specified.
| Specification | LT-700-072 |
LT-700-216 |
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| RF | RF Frequency Range | 72.025 - 75.950 MHz |
216.0125 - 216.9875 MHz |
| Number of Channels | 17 wide band, 40 narrow band |
19 wide band, 38 narrow band |
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| Frequency Accuracy | ± .005% stability 32 to 122º (0 to 50ºC) |
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| Transmitter Stability | 50 PPM |
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| Transmission Range | From 0 to 150 ft. (45.7 m) |
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| Output Power | Less than 10mW (72 MHz) |
Less than 100mW (216 MHz) |
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| Antenna | Microphone cable |
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| Antenna Connector | 3.5 mm connector |
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| Compliance | FCC Part 15, Industry Canada |
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| Audio | ** All system specifications are wireless end-to-end ** |
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| System Frequency Response | 50 Hz - 15 kHz (±3dB) 72 MHz, |
50 - 10 kHz (±3dB) 216 MHz |
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| System Signal to Noise Ratio | SQ enabled: 80dB; SQ disabled 60dB |
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| System Distortion | <2% total harmonic distortion (THD) at 80% deviation |
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| Microphone Input | Unbalanced, ring of 3.5 mm connector, (-10dB nominal input level adjustable, +4dBu maximum, impedance 10k Ohms) |
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| Microphone Sensitivity | Three position switch: high, middle, and low; 6db increments |
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| Line Input | Unbalanced, ring of 3.5mm connector, -10dbu nominal input level, -3dbu maximum, impedance 10K ohms |
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| Microphone Power | 3VDC Bias |
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| Controls | User Controls | Power, mute, channel UP/DOWN |
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| Set-up Controls (battery compartment) | Mic sensitivity, NiMH/alkaline battery, SQ enable/disable |
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| Programming | Channel Lock out,Channel lock |
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| Indicators | LED | Red, illuminated when unit is on. Flashes when batteries are low, or to indicate charging. Flashes when muted |
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| Display | Channel Designation, lock status, signal strength indication, battery life, RF Power |
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| Power | Battery Type | Two AA batteries, alkaline or NiMH |
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| Battery Life (Listen batteries) | 15 hours alkaline (LA-361), 8 hours NiMH rechargeable (LA-362) |
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| Battery Charging (NIMH only) | Fully automatic, 13 hours |
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| Power Supply | I/P 120VAC; O/P 7.5VDC 250 mA; Drop in contact points for use with charging cases. Power supply not included (LA-202) |
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| Power Supply Connector | 2.3mm OD by 0.7mm ID, barrel type connector 7.5 VDC, center positive <250mA. Drop in contact points for use with Listen charging cases |
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| Power Supply Compliance | RoHS, WEEE, UL, PSE, CE, CUL, TUV, CB compliant |
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| Physical | Dimensions (H x W x D) | 3.00 x 1.00 x 5.00 in. (7.6 x 2.5 x 13.0 cm) |
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| Color | Dark Grey with white silk screening |
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| Unit Weight | 3.9 oz (111g) |
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| Unit Weight with batteries | 5.8 oz (164g) |
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| Shipping Weight | 1.0 lbs. (0.45kg) |
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| Door | Manually lockable, controls accessible through doors |
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| Environmental | Temperature - Operation | 14 to 104º F (-10 to 40º C) |
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| Temperature - Storage | -4 to 122° F (-20 to 50° C) |
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| Humidity | 0 to 95% relative humidity, non-condensing |
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Specifications are subject to change without notification |
|||
| Specification | LT-700-863 |
|
| RF | RF Frequency Range | 863.050 - 864.950 MHz |
| Number of Channels | 17 wide band |
|
| Frequency Accuracy | ± .005% stability 32 to 122º (0 to 50ºC) |
|
| Transmitter Stability | 50 PPM |
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| Transmission Range | 0 ft. (0 m) to 250 ft. (76.2 m) |
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| Output Power | 10mW maximum (adjustable) |
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| Antenna | Uses microphone cable |
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| Antenna Connector | 3.5 mm connector |
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| Compliance | CE, ETSI, RoHS |
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| Audio | ** All system specifications are wireless end-to-end ** |
|
| System Frequency Response | 50 Hz - 15 kHz (±3dB) |
|
| System Signal to Noise Ratio | 70db (A-Weighted) |
|
| System Distortion | <2% total harmonic distortion (THD) at 80% deviation |
|
| Microphone Input | Unbalanced, tip of 3.5mm connector, -20 dbu nominal, -30 dbu maximum, impedance 21 ohms |
|
| Microphone Sensitivity | Three position switch: high, middle, and low; 6db increments |
|
| Line Input | Unbalanced, ring of 3.5mm connector, -10dbu nominal input level, -3dbu maximum, impedance 10K ohms |
|
| Microphone Power | 3VDC Bias |
|
| Controls | User Controls | Power, mute, channel UP/DOWN |
| Set-up Controls (battery compartment) | Mic sensitivity, NiMH/alkaline battery, SQ enable/disable |
|
| Programming | Channel Lock out,Channel lock |
|
| Indicators | LED | Red, illuminated when unit is on. Flashes when batteries are low, or to indicate charging. Flashes when muted |
| Display | Channel Designation, lock status, signal strength indication, battery life, RF Power |
|
| Power | Battery Type | Two AA batteries, alkaline or NiMH |
| Battery Life (Listen batteries) | 15 hours alkaline (LA-361), 8 hours NiMH rechargeable (LA-362) |
|
| Battery Charging (NIMH only) | Fully automatic, 13 hours |
|
| Power Supply | I/P 120VAC; O/P 7.5VDC 250 mA; Drop in contact points for use with charging cases. Power supply not included (LA-202) |
|
| Power Supply Connector | 2.3mm OD by 0.7mm ID, barrel type connector 7.5 VDC, center positive <250mA. Drop in contact points for use with Listen charging cases |
|
| Power Supply Compliance | RoHS, WEEE, UL, PSE, CE, CUL, TUV, CB compliant |
|
| Physical | Dimensions (H x W x D) | 3.00 x 1.00 x 5.00 in. (7.6 x 2.5 x 13.0 cm) |
| Color | Dark Grey with white silk screening |
|
| Unit Weight | 3.9 oz (111g) |
|
| Unit Weight with batteries | 5.8 oz (164g) |
|
| Shipping Weight | 1.0 lbs. (0.45kg) |
|
| Door | Manually Lockable. Up, down, and power buttons through door. Other controls behind door (see controls) |
|
| Environmental | Temperature - Operation | 14 to 104º F (-10 to 40º C) |
| Temperature - Storage | -4 to 122° F (-20 to 50° C) |
|
| Humidity | 0 to 95% relative humidity, non-condensing |
|
Specifications are subject to change without notification |
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1. A microphone or line level source (such as a CD or MP3 player) connects here. Use the LA-263 Line/Microphone “Y” Cable (72 MHz and 216 MHz) to connect an audio device with your microphone. Transmitter antenna is built into the microphone cord, eliminating additional wires while maximizing transmission effectiveness.
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.
5. Offers 57 channels, or can be programmed so that only the channels you are using are displayed.
6. Easy access POWER button.
7. Uses two AA batteries. Adjustable to use either alkaline or NiMH batteries
8. When enabled, SQ technology provides the highest audio quality available in its product category. SQ can be disabled for compatibility with other assistive listening or tour group equipment.
9. Adjustable microphone sensitivity switch for best audio results.
10. UP/DOWN channel selection. Also used to lock and unlock channel selection to prevent accidental channel switching.
11. Manually lockable battery compartment door.
12. Single transformer charging plug port.
13. Contact points for Listen’s drop in charging cases.
14. Exclusive belt clip “loop” prevents unit from slipping off belt or strap.
1. A microphone or line level source (such as a CD or MP3 player) connects here. Transmitter antenna is built into the microphone cord, eliminating additional wires while maximizing transmission effectiveness.
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.
5. Offers 17 channels, or can be programmed so that only the channels you are using are displayed.
6. Easy access POWER button.
7. Uses two AA batteries. Adjustable to use either alkaline or NiMH batteries.
8. Adjustable microphone sensitivity switch for best audio results.
9. UP/DOWN channel selection. Also used to lock and unlock channel selection to prevent accidental channel switching.
10. Manually lockable battery compartment door.
11. Single transformer charging plug port.
12. Contact points for Listen’s drop in charging cases.
13. Exclusive belt clip “loop” prevents unit from slipping off belt or strap.
