Data Sheet
Operating voltage: 5V or 12V DC
Carrier frequency: 140 to 150MHz, 223 to 235MHz or 400 to 500MHz
Interface: standard RS-232/RS-485/TTL selectable
Baud rate: 1,200/2,400bps selectable
Channel spacing: 25kHz/12.5kHz/5KHz
Frequency stability: ±2.5ppm
Modulation: FFSK
Channels: 16
Impedance: 50Ω
Temperature: -25℃ to 75℃
Size: 72 x 46 x 14mm (without antenna port)
Weight: 180g
Transmission distance: 2-3km
Interface definition:
|
Pin No.
|
Signal name
|
Function
|
Level
|
Remarks
|
|
1
|
VCC
|
Power input
|
12 V
|
1W and 500mW modules are 12V power supply
|
|
2
|
5V
|
For 500mW module, 5V is also available
|
||
|
3
|
GND
|
Ground of the power
|
|
|
|
4
|
||||
|
5
|
A(TXD)
|
RS-485 A or TXD of RS-232
|
|
choose RS232 or RS485,only one valid
|
|
6
|
B(RXD)
|
RS-485 B or RXD of RS-232
|
|
|
|
7
|
PTT
|
Transmitting control
|
TTL
|
Low level valid
|
|
8
|
MIC
|
Microphone input control
|
|
Microphone with 1kΩ-2kΩ and -27dB
|
|
9
|
SP
|
Output audio
|
|
8Ω 0.5
|
|
10
|
SQ
|
receiving
|
TTL
|
High level
|