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How do Ctcss toneS work?
CTCSS is a system whereby a (not really) sub-audible tone is encoded into the transmit audio of a radio and a receiver on another radio on that frequency will only open up (decode) when it picks up that specific tone. These are where CTCSS really shines.
How do I program my Baofeng tone?
How to Set the Tone for Repeater Use in Baofeng UV-5R
- Press Menu button.
- Press 13 on keypad (T-CTCS).
- Press menu button again.
- Toggle with up/down arrows to the setting you want.
- Press Menu again.
- Press ‘exit’ to get back to the home screen or just wait the 9 seconds or more and it will go there for you automatically.
How does CTCSS work on a ham radio repeater?
This is obviously not desirable and a system known as CTCSS (Continuous Tone Coded Squelch System) has been introduced to overcome this problem. CTCSS uses a sub-audible tone transmitted on the signal of the transmitter trying to access the repeater. The amateur radio repeater has a very sharp filter to detect whether the exact tone is present.
What’s the standard frequency for a tone burst repeater?
The repeater would have an audio filter that would extract the tone, and only if it was present would the repeater activate. The standard frequency generally adopted for this is 1750 Hz in Europe. A margin of around 25 Hz either way will normally access a repeater although it is wise to maintain the tone burst frequency more accurately than this.
Do you need the correct offset for a repeater?
To access a repeater you need to have its Frequency entered into your radio, have its transmit Offset set correctly and have the right CTCSS Tone turned on. You might not need to check all of these things in that exact order but it is a good way to approach the problem.
What happens if you dont have the offset and tone set on Your Radio?
Trying to go through a repeater can really confused things because you may not have the offset and tone set properly. Even more confusing is that one radio can “desense” the other radio, which means that the other radio’s receiver will be overloaded and not able to receive the repeater’s signal.