Struct SpectralMask 

pub struct SpectralMask<const N: usize> {
    pub name: &'static str,
    /* private fields */
}

A piecewise-linear spectral emission mask.

Fixed-capacity array of mask points, sorted by frequency. Supports MIL-STD-461G RE102 (2 MHz – 18 GHz), CE102 (10 kHz – 10 MHz), 3GPP TS 36.141 §6.3 ACLR, and ITU-R SM.1048-5 masks.

Fields

name: &'static str

Mask identifier (e.g., “RE102_ground”, “CE102”, “ACLR_E-UTRA”).

Implementations

impl<const N: usize> SpectralMask<N>

pub const fn empty(name: &'static str) -> Self

Create an empty mask.

pub fn add_point(&mut self, freq_hz: f64, limit_db: f32) -> bool

Add a point. Returns false if mask is full.

pub fn limit_at(&self, freq_hz: f64) -> Option<f32>

Interpolate the mask limit at a given frequency.

Returns None if the frequency is outside the mask range. Uses linear interpolation between adjacent points.

pub fn len(&self) -> usize

Number of mask points.

pub fn is_empty(&self) -> bool

Whether the mask is empty.

pub fn deviation(&self, freq_hz: f64, measured_db: f32) -> Option<f32>

Compute the mask deviation residual: measured_db − limit_db.

Positive values indicate the measurement exceeds the mask (violation). Negative values indicate margin remains.