433MHz Lora Signal Booster Amplifier Two-Way Signal Amplifier AB-IOT-433-SMA Module 420MHz-480MHz

433MHz Lora Signal Booster Amplifier Two-Way Signal Amplifier AB-IOT-433-SMA Module 420MHz-480MHz

Read Before Purchasing:
- The AB-IOT series amplifier is an upgraded version of XQ-433, with a wider supply voltage range
- The applicable frequency band of AB-IOT-433-SMA is: 420MHz-480MHz
- The product is a two-way amplified TDD working mode (that is, the transmit power and receiving sensitivity will be amplified equally)
- Working voltage is 3.6V-6V
- This product is relatively professional, and wireless communication is greatly affected by the environment. We only guarantee that all parameters are measured by instruments.

Description:
The AB-IOT-433 series of two-way signal amplification modules are designed for various applications in 433MHz (420MHz-480MHz) frequency band. Its compact size and convenient use make it easier to design products for high-power and long-distance applications in this frequency band.

Mainly used in various occasions in 420MHz-480MHz frequency band that have special requirements for signal transmission distance and connection stability, such as 433MHz remote control aircraft, 433MHz wireless data acquisition system, Lora products. Power wireless products can use this two-way amplification module to increase transmission distance.

Performance Features:
- Built-in intelligent receiving/sending discrimination circuit, no need for front-end equipment to provide receiving/sending switching control signal
- The module works in the receiving state by default and amplifies the received signal. When the front-end equipment is detected to transmit external signals, it will instantly switch to the transmission and amplification state
- The transmission gain is manually adjustable, which is convenient to be compatible with wireless devices with different transmission powers
- The receiving/sending link has a high degree of isolation, and the receiving link can withstand strong external interference without causing self-excitation of the loop
- Compatible with multiple modulation methods, for LORA and FSK/ASK/OOK/MSK/GFSK and the like
- The default working frequency band is 420MHz-480MHz. It can also be adapted to any frequency band between 300MHz-600MHz by adjusting the parameters (bandwidth 60MHz, such as 300MHz-360MHz, 520MHz-580MHz), if you have such a similar requirement, please contact us

Specifications:
- Working frequency band: 420MHz-480MHz
- Receiving gain: 11dB±2dB
- Receiving noise figure: ≤2.0dB
- Transmission gain: 5dB-11dB (±2dB) adjustable
- Recognition threshold for receiving and sending switching: -2dBm
- Input power range: 1dBm-25dBm
- Maximum transmit power: 31.5dBm (1.4w) at 3.7V power supply voltage; 33.5dBm (2.3w) at 5.0V power supply voltage; 34.5dBm (2.8w) at 6.0V power supply voltage
- Working status indication: Receiving status: green light is on and blue light is off. Transmitting status: blue light is on and green light is off. In TDD working mode, blue light and green light will flash alternately
- Working voltage: The supply voltage can be between 3.6V-6.0V. The maximum transmission power increases as the supply voltage increases.
- Working current: RX state: 10mA (±3mA). TX status: ≤800mA (3.7v power supply). ≤1000mA (5.0v power supply). ≤1500mA (6.0v power supply)

Attention:
- The operating voltage only affects the maximum transmission power, and has little effect on the transmission gain. Therefore, for applications where the output power of the front-end equipment is not large, it is generally recommended to use a 3.7V lithium battery for direct power supply or a power supply of 5.0V. It is not necessary to use 6.0V for power supply.
- Since the maximum transmit gain of the module is about 11dB, if the actual output power of the module can reach the maximum, the output power of the front-end equipment must be sufficient. For example, if you want the actual output power to reach 34.5dBm when the power supply voltage is 6.0V, the output power of the front-end equipment must reach 13.5dBm (23.5+11=34.5). If the output power of the front-end equipment is only 10dBm, even if the working voltage is 6.0V, the actual output of the module can only reach 21dBm instead of 34.5dBm. Please be aware of this.
- Under normal circumstances, the maximum gain (power) transmission is not recommended, because the greater the transmission power, the greater the power consumption and heat generation. If the power consumption is large, it is extremely unfavorable for battery-powered equipment. In actual use, it is recommended to adjust the gain while testing coverage scope, so that it can just meet the actual coverage requirements and a slight surplus is better.
- In order to ensure reliable switching, the transmit power of the front-end equipment must be reserved at least 3dB margin, that is, the minimum transmit power of the front-end equipment cannot be lower than 1dBm, otherwise it may cause instable receiving/transmitting switch.
- When the module is working, most of the sequence is in the receiving state, and the current in the receiving state is about 10mA. When the module is switched to the transmitting state and transmitting with maximum power, the instantaneous current can reach up to 1.5A. Because the transmission sequence is generally very short (normally, each group of data packets is ms or even us level), so the average current is generally not higher than 200mA during the entire working period.

Warning:
- The module is not recommended for applications with constant emission (that is, the blue light is always on)! If it is necessary to work in constant transmission mode and the transmission power is high (close to 2.8w), there will be large currents and serious heat generation. At this time, additional heat dissipation measures (such as adding heat sinks or fans) must be added, otherwise the maximum transmission power will will automatically reduce due to high temperature, and the amplifier module will be burnt in severe cases.

Transmission Gain Adjustment:
- The transmit gain is 5dB when the potentiometer turns counterclockwise to the end;
- The transmit gain is 11dB when the potentiometer turns clockwise to the end.

Package Included:
- 1 x Set of Signal Amplifier Module

Note:
- Handheld walkie talkies cannot use this module to extend the transmission range due to their high transmit power.
- Battery is not included.
- Cables pictured are not included, for demonstration purposes only. Thank you for your understanding!

Pin Definition of This Module: