PPM Frequency Error Calculator

Check oscillator drift against manufacturer spec — tailored to your TX mode.

Frequency

Manufacturer spec

TX mode

PPM error itself comes from the reference oscillator and doesn't change with TX mode — but how much it matters does. Narrowband and digital modes have far less margin than wideband analog FM. These tolerances are practical rules of thumb, not a formal standard.

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Calculations
All calculations run entirely in your browser — no data is sent to any server. PPM tolerances for TX modes are practical rules of thumb, not formal standards.
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