4KM High-Power Long Range RF Link Kits
4KM High-Power Long Range RF Link Kits have two version frequency: 315Mhz and 433Mhz .
So please choose the frequency when you order this item, and the default version is 315Mhz.
1、Transmitter Module
Features
This transmitter module uses SAW oscillator, with high frequency stability and small temperature drift. Even while touching the antenna with hand, there is no frequency offset. Its frequency error is very small, typically less than +/- 75kHz, which is far less than +/-500kHz frequency error of LC oscillator. The transmitter module size is small. It's operating voltage range is DC 3V-9V. So it has high transmit power and low power consumption. All contribute to stable performance.
It adopts SMD technology, and the most advanced SAW resonator (SAW) components for frequency stabilization. The circuit board (PCB) is made of material with the smallest dielectric loss. All the prodcuts has passed strict QC inspection before delivery.
Technical Parameters
Operating Voltage: DC 3V~9V (9V Recommend)
Operation Current: 25~240mA
Quiescent Current: ≤ 0.02uA
Modulation: ASK-OOK
Temperature Range: -10℃ ~ +70℃
Output Power: 26dBm (400mW)
Transmission Rate: ＜10Kbps
Transmit Distance: 4000 meters (in open area)
Oscillating Resistance: 4.7M
Size: 41 x 30 x 8mm
Frequency: 315/433 Mhz
Notice:
The antenna has a great influence on the receiving effect of this module. It is better to connect the 1/4 wavelength antenna, usually using 50 ohm single-core wire.
The length of the antenna is about 23cm for 315Mhz, and about 17cm for 433Mhz.
The position of the antenna also affects the receiving effect of this module. So when installing, the antenna should be as straight as possible, away from the shield、high voltage and interference source.
2、Receiver Module
This is a Superheterodyne Receiver Module
Technical Parameters
Operating Voltage: DC 5.0V ± 0.5V
Operating Frequency: 315/433 Mhz
Quiescent Current: ≤8mA (5.0VDC)
Transmission rate: ≤9.6Kbps
Receiver Sensitivity: -107dBm (50Ω)
Modulation: ASK-OOK
Oscillating Resistance: 820K
Operating Temperature: -30 ℃ ~ +80 ℃
Dimensions: 36 x 15 x 7mm
