Module Information
Model: RC-TASK2-868
Description:
ASK/OOK transmitter module with Crystal oscillator.
Vdc: 2.2 ÷ 3.6Volt
Current: 21/15mA
Frequency: 868.30MHz
Power : 10dBm
Dimension: 20.32 x 11.43mm
Model: RC-TFSK3-434
Description:
433.92MHz FSK Radio Transmitter Module - Standard Pinout .
Vdc: 2.4 ÷ 3.6Volt
Current: 14.5m
Frequency: 433.92MHz
Powe : 10dBm
Dimension: 20.32 x 11.43mm
Model: RC-TFSK4-434
Description :
433.92MHz FSK Transmitter Module - Standard Pinout.
Vdc: 2.4 ÷ 3.6Volt
Current: 14.5mA
Frequency: 433.92MHz
Power : 10dBm
Dimension: 30.5 x 10.3mm
Reference Schematics
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ASK and FSK Modulation
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Pulse Amplitude Modulation (ASK) and Pulse Frequency Modulation (FSK) are two basic modulation techniques used in data transmission over a communication channel.
Pulse Amplitude Modulation (ASK) is a modulation technique in which the carrier signal is modulated in amplitude to represent the transmitted data. In ASK, the carrier waveform can be a sine wave, square wave or triangular wave. The carrier waveform is modulated with a data waveform, which can be binary or multilevel. During transmission, the modulated signal is sent over the communication channel and, at the receiver, is demodulated to recover the transmitted data.
Pulse Frequency Modulation (FSK), on the other hand, modulates the frequency of the carrier waveform to represent the transmitted data. In FSK, the carrier waveform can be a sine wave, square wave or triangular wave. Typically, there are two carrier frequencies available, and the modulated signal is sent using one of these frequencies to represent bit 0 and the other frequency to represent bit 1. During reception, the signal is demodulated and the frequencies are identified to recover the transmitted data. The main difference between ASK and FSK is that ASK modulates the amplitude of the carrier waveform while FSK modulates the frequency of the carrier waveform. Additionally, ASK is usually simpler to implement than FSK as it requires fewer electronic components.
However, FSK has some advantages over ASK. Since FSK modulates the frequency of the carrier waveform, it is less susceptible to amplitude interference compared to ASK. Additionally, FSK is more resistant to interference caused by other signal sources, such as radio signals from other stations.
In general, ASK and FSK are widely used modulation techniques in data transmission over communication channels. The choice between the two depends on the specific needs of the application and limitations of the system. FSK (Frequency-Shift Keying) and ASK (Amplitude-Shift Keying) modulations are both used for the transmission of digital data over wireless and wired communication channels.
FSK modulation is used in many wireless applications, including data transmission between mobile devices, telemetry, industrial automation, and radio frequency identification (RFID). FSK modulation can transmit digital information at low speeds over communication channels with good resistance to noise and interference. Additionally, FSK modulation is relatively easy to implement and requires low signal bandwidth, making it suitable for low-power applications.
The frequency of use of FSK modulation can vary depending on the application. For example, in industrial settings, FSK modulation is used at frequencies of a few kHz, while in wireless applications such as Bluetooth and ZigBee, FSK modulation is used at frequencies of several MHz.
ASK modulation is also used for the transmission of digital data over wireless and wired communication channels. ASK modulation is very easy to implement and can transmit digital information at low speeds over communication channels with good resistance to noise and interference.
ASK modulation is used in many wireless and wired applications, including data transmission between computers, mobile devices, sensors, and actuators. The frequency of use of ASK modulation can vary depending on the application, but it is usually found in the radio wave range, ISM band sub 1GHz. In summary, both FSK and ASK modulations are widely used for the transmission of digital data in a wide range of wireless and wired applications, at frequencies that can vary depending on the specific application.
RadioControlli supply a wide range of Radio Modules (transmitter and receiver) that works bot in ASK or in FSK modulation :
1) Transmitter ASK
2) Transmitter FSK
3) Receiver ASK
4) Receiver FSK