Transmitter (TX) and receiver (RX) are one of the first things that must be owned before assembling Racer Drones, Quadcopter, RC aircraft and other RC Assemblers. This can sometimes confuse RC beginners how to choose Radio Transmitter before assembling. For this reason, in this short article, we will explain how to choose the right Radio Transmitter and not to choose the wrong one.
Radio Transmitter (radio transmitter or TX) is a device that allows pilots to control aircraft, drones, aircraft and other RC without the need for cables. The signal / command is then received by the radio receiver (RX) which is connected to Flight Controller. below are things we need to pay attention to before buying a Transmitter.Channels
The number of channels determines how many actions can be controlled in a controlled Drone, aircraft or Quadcopter. For example, throttle, yaw, pitch, and roll, each requires 1 channel. And as you know, it takes a minimum of four channels to control a quadcopter which is used to control (pitch, roll, throttle, yaw). But for larger quadcopters hobby classes, we usually need more channels to control gimbals, servo and so on.
It is generally recommended to have at least 5 or 6 channels for quadcopter, drone or RC plane. Other channels 1 or 2 can be used to turn on / off or switch to different flight modes.
There are 4 different TX modes, mode 1, mode 2, mode 3 and mode 4. basically the difference is the different configurations of the two right and left sticks. Mode one has an elevator control on the left stick and throttle on the right stick. The second mode is the most common for quadcopter because one stick represents the movement of your quadcopter. That is the elevator control on the right stick and throttle motor in the left. the right stick is on both axes, while the left stick only centers on the yaw axis (left / right direction) slides in the throttle axis (up / down) to allow constant throttle. while mode 3 and mode 4 are very rarely used in the world of RC aircraft. for that choose Transmitter with mode 2 or mode 1 for Aircraft like FixWing Drones and so on.
The 2.4GHz system is a new technology, and currently the most popular frequency for Aircraft and ground RC this is the RC standard after it made a new protocol that introduces frequency hopping technology that allows users to not have to worry about choosing frequencies or messing up with the same channel from other pilots . Antennas are smaller and easier to carry, but usually with shorter distances than the frequency of 27/72 MHz.
All RadioTransmitter manufacturers switch to the new protocol hopping channel which makes the RC very easy to maintain and use. Software that is constantly updated to scan the best frequencies used and if it detects any interference, automatically switches to another available channel. This is done many times per second so you have never experienced glitches or radio problems which have been a big problem in the RC industry for years.
4. Radio Receiver
Transmitters are generally equipped with Receivers. It is important to note that TX only works with radio receivers (aka RX) from the same manufacturer with the same frequency and the same protocol. For example, if you buy the Frsky Taranis Transmitter, you must use a Frsky receiver, or another compatible Frsky receiver. So before buying the receiver, read the specifications of the Receiver first, whether it is compatible with the Transmitter that we have / buy.
There is a consideration of the recipient protocol used and the technology applied, such as PWM, PPM and SBUS. In general, SBUS is better than PPM, while both are better than PWM because the number of connections is needed. for that it is recommended to choose a receiver that supports ppm and pwm or pwm and sbus and adjust it to your needs for example Drone Racer select the small size and support the ppmdan protocol or SBUS Register the best SBUS CPPM receiver