# Transmitter interference

### Explanation of question 1

- i ‘Frequency drift’ is a slow change of frequency
- ii ‘Chirp’ is a fast change of frequency which can occur during keying

1. i and ii are both true
2. i is true but ii is false
3. i is false but ii is true
4. i and ii are both false

The answer is :- 1Frequency drift is a slow change of frequency, very often occurring during the ‘warm-up’ period when the oscillator components may change slightly in value. Chirp can be due to the sudden loading on the power supply when the key is closed. This can cause a reduction in the power supply voltage and so vary the frequency of the oscillator.

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