Enum Fcc15247 

pub enum Fcc15247 {
    DigitalModulation,
    FrequencyHopping {
        channels: u16,
    },
}

A 902-928 MHz transmitter as 47 CFR 15.247 classes it for a power limit.

Paragraph (b) caps the peak conducted output power, and paragraph (b)(4) bases that cap on an antenna of no more than 6 dBi: past that, the conducted power comes down by every decibel the gain exceeds 6 dBi. Which class a device belongs to follows from how it is built and certified, which this type does not decide.

Examples

use pamoja_lora::budget::{Decibels, Fcc15247};

// A 9 dBi Yagi takes 3 dB off the 1 W limit for digital modulation.
let yagi = Decibels::from_db(9);
let limit = Fcc15247::DigitalModulation.max_conducted_dbm(yagi);
assert_eq!(limit, Some(Decibels::from_db(27)));

// Paragraph (b)(2) names no limit for hopping on fewer than 25 channels.
let hopping = Fcc15247::FrequencyHopping { channels: 20 };
assert_eq!(hopping.max_conducted_dbm(yagi), None);

Variants

DigitalModulation

A system using digital modulation, limited to 1 W by paragraph (b)(3).

FrequencyHopping

A frequency hopping system, limited by paragraph (b)(2) to 1 W on at least 50 hopping channels and to 0.25 W on 25 to 49.

Fields

channels: u16

The number of hopping channels the system uses.

Implementations

impl Fcc15247

pub fn max_conducted_dbm(self, antenna_gain_dbi: Decibels) -> Option<Decibels>

Returns the most conducted output power the rule allows through an antenna, in dBm.

Arguments

• antenna_gain_dbi - the directional gain of the transmitting antenna.

Returns

The limit of paragraph (b)(2) or (b)(3), less whatever the gain exceeds 6 dBi, or None for a hopping system on fewer than 25 channels, which paragraph (b)(2) sets no limit for.

Trait Implementations

impl Clone for Fcc15247

fn clone(&self) -> Fcc15247

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Copy for Fcc15247

impl Debug for Fcc15247

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Eq for Fcc15247

impl Hash for Fcc15247

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl PartialEq for Fcc15247

fn eq(&self, other: &Fcc15247) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl StructuralPartialEq for Fcc15247