Spectrum (Bluetooth Spectrum)
The trace shows the measured power spectrum across the Bluetooth grid — for LE in-band emissions, the full 40-channel × 2 MHz Megahertz: A unit of frequency equal to one million hertz or cycles per second. span. It is the spectrum from which the Channel Power and Band Power results are integrated.
The trace reflects the Detector selection (Average by default, Peak selectable) and is averaged according to the measurement's settings.
The Power Calculation setting does not change this trace. It rebases the per-channel and per-band results only; the spectrum bins themselves are always reported on the integrated-power basis.
Spec Limit Line
A limit line named is drawn on this trace, showing the emissions mask that the selected Test Purpose applies. The mask is positioned relative to the carrier, so it moves with the carrier band.
The limit line is drawn for reference and does not itself produce a pass/fail result, because a point-by-point test cannot express the specification's exception-band allowance. The pass/fail verdict is reported by the Summary and Band Table traces.
See Also
