Definition
A continuous audio signal at 1020 hertz (1020 cycles per second) used to identify a VOR Test Facility (VOT). When a pilot tunes a VOT frequency, the receiver outputs this steady tone instead of a Morse code identifier, confirming the signal being received is the test transmission used to check VOR receiver accuracy on the ground.
Plain English
A steady audio note that plays through the headset when you tune a VOT. Hearing it tells you that you are picking up the test signal so you can check your VOR equipment.
Context Anchor
Seen during VOR receiver accuracy checks using a VOT in instrument flying procedures.
Derivation
Cycle' refers to one full wave of an audio signal. '1020-cycle' means 1020 complete waves per second, which is the pitch (frequency) of the tone. The number is simply the chosen test frequency, not a code with hidden meaning.
Why Pilots Care
Confirms VOR receiver accuracy to within regulatory limits before relying on it for navigation.
Grounding Statement
If the nav receiver audio is turned on during a VOT check, the pilot may hear this steady identifying tone.
Intuition Check
Cycle does not mean a bicycle, a training cycle, or an engine cycle here. It means one complete repeat of a sound wave.
Example Sentence 1
After tuning the VOT frequency, the pilot heard the 1020-cycle tone and proceeded with the VOR accuracy check.
Example Sentence 2
The 1020-cycle tone allowed the pilot to center the course deviation indicator and verify the receiver was within tolerance.