Enum Mode 

pub enum Mode {
    Fm = 0,
    Dv = 1,
    Am = 2,
    Lsb = 3,
    Usb = 4,
    Cw = 5,
    Nfm = 6,
    Dr = 7,
    Wfm = 8,
    CwReverse = 9,
}

Operating mode as returned by the MD (mode) CAT command.

The TH-D75 supports 10 modes (0-9) via the MD command. Modes 0-7 are confirmed by firmware RE and the KI4LAX CAT command reference. Modes 8 (WFM) and 9 (CW-R) are confirmed by the ARFC-D75 decompilation.

Note: the FO/ME commands use a different mode encoding (0=FM, 1=DV, 2=NFM, 3=AM) stored as a raw u8 in ChannelMemory. This enum is only used for the MD command.

Band restrictions (per Kenwood Operating Tips §5.9)

Not all modes are available on both bands:

• Band A supports only FM and DV. Band A is the amateur TX/RX band (144/220/430 MHz). Its receiver chain (VCO/PLL IC800, IF IC IC900) is a double super heterodyne with 1st IF at 57.15 MHz and 2nd IF at 450 kHz — it has no third IF stage, so AM/SSB/CW demodulation is not possible in hardware (service manual §2.1.3).
• Band B supports all modes: FM, DV, AM, LSB, USB, CW, NFM, DR, WFM, and CW-R. Band B’s receiver chain (VCO/PLL IC700, IF IC IC1002) adds a third mixer (IC1001) producing a 3rd IF at 10.8 kHz, which feeds into the CODEC (IC2011) for AM/SSB/CW demodulation. This triple super heterodyne architecture is what enables the wideband mode support (service manual §2.1.3.2).
• DR (D-STAR repeater mode) is only available on Band A. Attempting to set DR on Band B via MD will be rejected by the firmware with a ? error.

Attempting to set an unsupported mode on a band via the MD command will result in the radio returning a ? error response.

Mode cycling on the radio (per User Manual Chapter 5)

Pressing [MODE] cycles through available modes:

• Band A: FM/NFM -> DR (DV) -> (back to FM/NFM)
• Band B: FM/NFM -> DR (DV) -> AM -> LSB -> USB -> CW -> (back to FM/NFM)

Switching between DV and DR requires the Digital Function Menu, not [MODE]. Switching between FM and NFM requires Menu No. 103 (FM Narrow), not [MODE].

WFM (Wide FM)

WFM is MD mode 8, confirmed by ARFC-D75 decompilation. It is the FM broadcast radio mode used on Band B for the 76-108 MHz range. The radio’s display shows “WFM” in this mode.

CW-R (CW Reverse)

CW-R is MD mode 9, confirmed by ARFC-D75 decompilation. It uses LSB detection for CW reception instead of the default USB detection used by standard CW mode.

Variants

Fm = 0

FM modulation (index 0). Available on both Band A and Band B.

Dv = 1

D-STAR digital voice (index 1). Available on both Band A and Band B.

Am = 2

AM modulation (index 2). Band B only — Band A lacks the 3rd IF stage (10.8 kHz via IC1001) required for AM envelope detection.

Lsb = 3

Lower sideband (index 3). Band B only — requires the 3rd IF at 10.8 kHz (via 3rd mixer IC1001 and 460.8 kHz local oscillation).

Usb = 4

Upper sideband (index 4). Band B only — requires the 3rd IF at 10.8 kHz (via 3rd mixer IC1001 and 460.8 kHz local oscillation).

Cw = 5

CW / Morse code (index 5). Band B only — requires the 3rd IF at 10.8 kHz (via 3rd mixer IC1001 and 460.8 kHz local oscillation).

Nfm = 6

Narrow FM modulation (index 6). Band B only — Band A supports only standard FM deviation.

Dr = 7

D-STAR repeater mode (index 7). Band A only — DR requires the CTRL/PTT band for gateway access and callsign routing.

Wfm = 8

Wide FM (index 8). Band B only — FM broadcast reception mode for the 76-108 MHz range. Confirmed by ARFC-D75 decompilation.

CwReverse = 9

CW Reverse (index 9). Band B only — uses LSB detection for CW reception instead of the default USB. Confirmed by ARFC-D75 decompilation.

Implementations

impl Mode

pub const COUNT: u8 = 10

Number of valid mode values (0-9).

Trait Implementations

impl Clone for Mode

fn clone(&self) -> Mode

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Mode

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

Formats the value using the given formatter.

impl Display for Mode

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

Formats the value using the given formatter.

impl From<Mode> for u8

fn from(mode: Mode) -> Self

Converts to this type from the input type.

impl Hash for Mode

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 Mode

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

Tests for self and other values to be equal, and is used by ==.

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

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl TryFrom<u8> for Mode

type Error = ValidationError

The type returned in the event of a conversion error.

fn try_from(value: u8) -> Result<Self, Self::Error>

Performs the conversion.

impl Copy for Mode

impl Eq for Mode

impl StructuralPartialEq for Mode