# Operating procedures and practices

### Explanation of question 4

The meaning of ‘QRN?’ in the Q-code is

1. should I send at a faster speed?
2. is my signal varying in frequency?
3. are other stations causing you interference?
4. are you troubled by static?

The answer is :- 4 ‘QRN?’ has the meaning ‘are you troubled by static?’ as opposed to ‘QRM?’ meaning ‘is my transmission being interfered with?’ Try to remember "N" for natural, "M" for man-made interference

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