Architectural Specifications; Specifications - Listen LT-700 User Manual

Specifications

Architectural Specifications

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, channel
lock ,program mode, channel lock status and RF signal strength. The portable transmitter shall incorporate automatic
battery charging circuitry for recharging of NiMH batteries. The Listen LT-700 is specified.
Specifications
Specification
RF Frequency Range
Number of Channels
Sensitivity
Frequency Accuracy
Transmitter Stability
RF
Transmission Range
Output Power
Antenna
Antenna Connector
Compliance
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LT-700-072
72.025 - 75.975 MHz
57 (17 wide, 40 narrow)
.6uV typical, 1 uV maximum for 12dB SINAD
±.005% stability 0° to 50°C (32° to 122° F)
50 PPM
From 0ft to 50ft(15.2m) -150 ft (45.7m)
Less than 10mW
Uses microphone cable
3.5mm connector
FCC Part 15, Industry Canada
LT-700-216
216.025 - 216.987 MHz
57 (19 wide, 38 narrow)
Less than 100mW