2KM Long Range RF link kits with encoder and decoder

This is a super long range 315mhz RF link kit Comes with VCO , PLL technology, steady Frequency and super anti-jamming ability. You can directly use it with your project like wireless data transport and remote control etc.

Transmitter module :

Special Parameter :

Frequency: 315Mhz

Modulation: ASK

Working Voltage: 6-9V DC

Frequency difference：min±75KHz max±150KHz

Timing resistor：1.5M

Launching power: 50mW(9V)

Working current：＜10mA（9V）

Frequency stability:0.037ppm/℃

Temperature range：-20℃--+85℃

Transmission rate:≤10Kbps

Encoder : PT2262

Receiver Sensibility: -105dbm

Emission Distance: 2000m in open ground

Size : 47.5 x 30 x 10mm

The transmitter module have one 23cm separate onboard antenna

When using this module, please erect it straight, and do not rely on other objects.

When using high power transmission board, please take special attention : when launching , please do not touch the launch antenna and do no touch the launch part on the circuit board.

2、Receiver module :

 

This is superregeneration Decoder Receiver

Decoder : PT2272

Size: 41x24x6 mm

It can be compatible with transmitter with 2262 chip ，315MHZ ，and 1.5M Timing resistor

Specialized superheterodyne receiving module has an inherent disadvantages :

when remote control signal is too strong and the module oscillation signal will be blocked, and unable to properly receive signal.
So at this time, you should be away for some distance (such as 10 meters) and then it can work normally.
 

In order to test whether the receiving modules work normally, give a 5 v dc voltag between the VCC and GND interface of receiving module, and connect light emitting diode with pin 10, 11, 12, 13, 17 interface respectively

When we press A button of trasmitter module, its corresponding pin 11 road LED will be light, until press the other button such as B key, pin 11 extinguish and pin 12 will be light.

Pin 17 interface is the effective decoding output port, no matter which button of the transmitter we push, it will become high level as long as decoding successfully, the transmitter stop transmitting immediately and it will extinguish

Warning: this kit is not suitable for data transfer but remote control. Safe for 2 commands/second

Encoding and Decoding :

The popular link is like this: MCU -> Encoder -> Transmitter ------ Receiver -> Decoder -> MCU

PT2262(Encoder) and PT2272(Decoder) are optional, their existence is to 1)avoid confusing when multiple RF links in range 2) isolate disturbance. You can integrate the encoding and decoding work to the MCUs on both side. Whenever there is no 315Mhz devices around, you may use it as direct cable connection.

Click to download Datasheet for PT2272 and PT2262