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RC Glossary


New to the RC Hobbies? What does buggy, bulkhead, nitro mean in radio control car hobbies? Check out the glossary for remote control cars below.

Crystal - XTAL --

Refers to the small microchips used in pairs with many radio systems (namely AM and FM). There is a crystal in the transmitter (TX) and a crystal in the receiver (RX). The crystals are tuned to a unique frequency, allowing them to communicate with each other while 'ignoring' signals from other frequencies. Only crystals on the same frequency can communicate with each other. With some radios, the module may need to be replaced in transmitter to change frequencies, but the crystal itself can usually be exchanged on the receiver. Some radios and receivers may use a 'synthesized crystal' system that allows the user to change frequencies by simply turning a dial. Note that a crystal based radio system uses 2 distinct crystals - the RX (receiver) crystal, and the TX (transmitter) crystal. The two are not interchangeable. Don't tear apart your 2.4 GHz radio system looking for crystals - you won't find any.
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