# Relation between Frequency deviation and multiplier

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#### Rayengine

##### Full Member level 5 Hi,

If we multiple the carrier frequency by n times, then the frequency deviation of the input signal is also n times of original. Am I right ?

If we upconverting the carrier frequency by x Hz, what is then the relation of deviation?

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Rayengine

#### flatulent

##### Advanced Member level 5 do math

These things are easier to visualize in algebra.

start with 1+d where d is deviation. If you mulitply you get 2+2d or twice the deviation.

If you mix you add and get A+1+d where A is the change in frequency. You have the same old d or deviation.

#### Rayengine

##### Full Member level 5 How about the phase noise, if pass through the multiplier?

#### flatulent

##### Advanced Member level 5 it too

The phase modulation and phase noise also gets multiplied.

The multiplication by a fraction, as done by a divider, will reduce the deviation and phase noise.

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