# Operating procedures and practices

### Explanation of question 15

A repeater can normally be accessed with a toneburst of

1. 1.75MHz for 500ms
2. 1.75kHz for 500ms
3. 1.75kHz for 5s
4. 1.75Hz for 50ms

The answer is :- 2 Most repeaters are accessed by a 1.75 kHz signal of duration 500ms.

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