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Symbol Rate and Modulation Bandwidth

The ratio mode divides bits per second by bits per symbol. ASK bandwidth is symbol rate times one plus the selected roll-off factor; FSK adds twice the frequency deviation.

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How to use this calculator

  1. Enter the known values in the units shown. Results update as you type.
  2. Where results are editable, change one to solve backwards. Lock a value to hold it fixed.
  3. Use the worked example to check the method. Reset restores the starting fields.

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Inputs and results stay in this browser tab. Bookify does not upload or store the values you enter.

Formula and method

Worked example: baud rate 1 = 1200. See the assumptions for units and model limits.

baud_rate_1= bit_per_second / bits_number; ASK = (1+m_factor) * baud_rate_2; FSK = ((1+m_factor) * baud_rate_3) + (2 * freq_difference); baud_rate_4= frequency

Worked example

Enter these known values and leave the other values blank.

Calculate baud rate by
Simple ratio
Bits per second
9600 bits/s
Number of bits per baud
8
Baud rate
1200 bauds/s

Assumptions and limitations

  • The ratio mode divides bits per second by bits per symbol. ASK bandwidth is symbol rate times one plus the selected roll-off factor; FSK adds twice the frequency deviation.
  • These idealized bandwidth estimates do not describe every pulse shape or regulatory occupied-bandwidth method. The frequency mode equates symbol rate to the selected cycle frequency. All four captured modes remain available.

Common questions

What does this model assume?

The ratio mode divides bits per second by bits per symbol. ASK bandwidth is symbol rate times one plus the selected roll-off factor; FSK adds twice the frequency deviation.

Can I solve for a different value?

Clear the desired editable unknown and enter sufficient independent known values. Unit selectors preserve quantities; singular or unsupported inverse branches remain incomplete.

References

Reject singular physical denominators and fractional discrete counts using exact isInteger checks.

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