Alternating Current
Resonance Bandwidth Calculator
Resonance Bandwidth Calculator is meant for one defined alternating current case. Run a separate case when the equipment, period, or connection changes.
Build the Bandwidth case
Resonance Bandwidth updates live after each input change.
Inputs to verify for Resonance Bandwidth
Collect Resonant frequency, and Quality factor from the same operating case before reading bandwidth.
- Resonant frequency
- Enter resonant frequency in Hz. Default shown: 10000 Hz.
- Quality factor
- Enter quality factor. Default shown: 20.
When resonant frequency is uncertain, run a low and high case instead of hiding that uncertainty in one entry.
How bandwidth is calculated
A clean Resonance Bandwidth result confirms the arithmetic for bandwidth; it does not prove the equipment rating or source data is the right one.
Only the entries shown on Resonance Bandwidth feed bandwidth. If another correction factor matters, keep it in the notes or make a separate run.
The formula uses Resonant frequency, and Quality factor to produce Bandwidth. Unit mistakes usually show up as an answer that is off by a factor of 10, 100, or 1,000.
The Bandwidth value and any supporting metrics belong to this same Resonance Bandwidth case, not to a nearby run with different inputs.
| Displayed value | Default case |
|---|---|
| Bandwidth | 500.00 Hz |
| Lower half-power estimate | 9,750.00 Hz |
| Upper half-power estimate | 10,250.00 Hz |
Applying bandwidth carefully
Read bandwidth together with the input values, not as a standalone fact. The same number can imply different decisions under a different equipment rating or operating period.
On Resonance Bandwidth, keep the waveform basis visible: RMS, peak, frequency, and phase terms are not interchangeable.
Changing resonant frequency while leaving quality factor fixed is a useful way to see which assumption controls the answer.
Records for quality factor
Save the Resonance Bandwidth waveform reference, meter mode, and whether the values are RMS or peak.
If a later Resonance Bandwidth run changes only resonant frequency, label it as sensitivity work. Several changed conditions deserve a new baseline.
When your notes point to Resonant Frequency, open it after saving this baseline so the two cases do not get mixed.
Detail checks for bandwidth
Resonance Bandwidth entries should identify whether they are RMS, peak, average, or phase values. A correct formula can still be wrong when the waveform reference changes.
When bandwidth becomes an input to another worksheet, copy the value only after the units and source condition have been verified.
Using Resonance Bandwidth carefully
Why did the answer move so much after one input changed?
Many electrical relationships are proportional, inverse, squared, or tied to a denominator. A small change in quality factor can have a visible effect when the other entries stay fixed.
What does a Check inputs message usually mean?
On Resonance Bandwidth, Check inputs usually means a required entry is missing, outside its allowed range, or creating an undefined operation.