Sell radio audio modem upto 3km range for transmitting voice /data msk modulation @China (Mainland)
I.Specifications :
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Transmission distance : 2-3 Km |
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Power output :5V |
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RF power :1W /500mW |
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Receiving current : ≤ 50mA |
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transmitter current : ≤450mA |
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Receiving sensibility: ≤-119dBm(more than 12dB SINAD) |
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Interface:RS-232/RS-485/TTL (pls tell us the interface you need ) |
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Frequency Band: 150MHz, 230MHz,450mhz (pls tell us the Frequency you need ) |
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Data Rate: 1200bps/ 2400bps (pls tell us the data rate you need ?) |
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Operating temperature :-35～+75℃(industrial standard ) |
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8channels ,extendable |
2.Interface definition:
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Pin No. |
Signal Name |
Function |
Level |
Connection with terminal |
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1 |
VCC |
Input power |
12V |
5V optional |
|
2 |
||||
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3 |
GND |
Grounding of the power |
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4 |
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5 |
A(TXD) |
RS-485 A or TXD of RS-232 |
Choose RS-485 or RS-232 |
|
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6 |
B(RXD) |
RS-485 B or RXD of RS-232 |
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7 |
PTT |
transmitt controlling |
TTL |
Low level |
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8 |
MIC |
Input audio |
Using micphone of 1-2kΩ and -27dB |
|
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9 |
SP |
Output audio |
8Ω 0.5 |
|
|
10 |
SQ |
Receiveing |
TTL |
High level |
Applications:
Marine filed, public traffic, interphone system of taxi, industrial automatic
control, electric power schedule, water conservancy monitor, signal collection and transmission of railway system, oil extraction and transportation control, measure of oil or water wells, hydrological monitor, weather information transmission, environment monitor, container management, goods management in supermarket, forest protection, intelligent building, wireless beaconing, geological reconnoiter, mobile location, military training, public security,
medical ward, remote control, detecting, and others automatic control fields.
Post by Susan Lu Telecommunications @2012-12-25 08:53:10
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- ShaoYaoJu , ChaoYang district , Beijing , China