| Data type | Radio.Transmitter.SpuriousEmissions |
| Description | Emission on a frequency or frequencies which are outside the necessary bandwidth. |
| Primitive type | Real |
| Dimension | Relative Magnitude |
| Notes |
Spurious emissions include harmonic emissions, parasitic emissions, intermodulation products and frequency conversion products, but exclude out-of-band emissions. Spurious emissions are usually specified as a relative magnitude measured in decibels (dB), but are sometimes specified as an absolute power measured in decibel-milliwatts (dBm). For example, the datasheet for a 5-watt transmitter might specify a spurious emission level of -13 dBm. Five watts is equivalent to 37 dBm, so a specification of -13 dBm means that the spurious emissions are 50 dB down from the intentional emissions. In general, to calculate the spurious emissions as a relative magnitude in dB, convert the transmitter's output power to dBm and then subtract the spurious emissions in dBm. |
| Unit Name | Unit Symbol | Description | Notes |
|---|---|---|---|
| Parts per Million | ppm | ||
| Decibels | dB | ||
| Parts per Thousand | ppt | ||
| Percent | % |
| Source | Article | Excerpt |
|---|---|---|
| FCC | 97.307 Emission Standards for Amateur Transmitters |
(read more) |
| Measuring Spurious Emissions |
(read more) |