pub enum Band {
Show 14 variants
A = 0,
B = 1,
Band2 = 2,
Band3 = 3,
Band4 = 4,
Band5 = 5,
Band6 = 6,
Band7 = 7,
Band8 = 8,
Band9 = 9,
Band10 = 10,
Band11 = 11,
Band12 = 12,
Band13 = 13,
}Expand description
Radio band index (0-13).
The TH-D75 uses a numeric band index in the FO and ME commands.
Variants A and B correspond to the two main VFO bands; the
remaining Band2..Band13 map to additional sub-band selections.
§Band architecture (per Kenwood Operating Tips §1.1, §5.9; User Manual Chapter 5)
- Band A (upper display): Amateur-only TX/RX at 144 MHz, 220 MHz
(TH-D75A only), and 430 MHz. Supports FM and DV modes.
Pressing and holding
[Left]/[Right]cycles: 144 <-> 220 <-> 430 MHz. Band A uses a double super heterodyne receiver (1st IF 57.15 MHz, 2nd IF 450 kHz) with VCO/PLL IC800 and IF IC IC900 (AK2365AU). - Band B (lower display): Wideband RX from 0.1-524 MHz. Supports
FM, DV, AM, LSB, USB, CW, NFM, WFM (FM Radio mode only), and DR.
Band B has an independent receiver chain with its own VCO/PLL IC700,
IF IC IC1002 (AK2365AU), and a third IF stage at 10.8 kHz via 3rd
mixer IC1001 for AM/SSB/CW demodulation. 1st IF is 58.05 MHz, 2nd
IF is 450 kHz. This independent hardware allows both bands to
receive simultaneously.
Pressing and holding
[Left]/[Right]cycles: 430 <-> UHF(470-524) <-> LF/MF(0.1-1.71) <-> HF(1.71-29.7) <-> 50(29.7-76) <-> FMBC(76-108) <-> 118(108-136) <-> 144(136-174) <-> VHF(174-216/230) <-> 200/300(216/230-410) <-> 430 MHz.
Both bands share the MAIN MPU (IC2005, OMAP-L138), CODEC (IC2011), and SUB MPU (IC1103) which controls the VCO/PLLs and IF ICs via SPI. The VCO/PLL reference clocks are TCXO1 57.6 MHz (X600) and TCXO2 55.95 MHz (X601), selected by analog switches IC604/IC605.
Per service manual §2.1.5, the Band B VCO/PLL (IC700) is also used for transmission on all bands. Band A’s VCO/PLL (IC800) handles Band A 1st local oscillation only.
§Hardware signal path (per service manual §2.1.3, §2.1.4)
Band A RX: ANT → LNA Q404/Q406 → BPF → 1st MIX Q400 → IF 57.15MHz
→ MCF XF1 → IF AMP Q900 → IC900 → 2nd IF 450kHz → CODEC IC2011
Band B RX: ANT → LNA Q404/Q406 → BPF → 1st MIX Q500 → IF 58.05MHz
→ MCF XF2 → IF AMP Q1000 → IC1002 → 2nd IF 450kHz → CODEC IC2011
(AM/SSB/CW: → 3rd MIX IC1001 → 3rd IF 10.8kHz → CODEC)
TX (all): CODEC IC2011 → MOD AMP IC2027 → SUB MPU IC1103 → Band B
VCO/PLL IC700 → RF AMP Q201 → PRE DRV IC201 → DRV AMP Q212
→ FINAL AMP Q217/Q218 → ANTBand A is the CTRL/PTT band by default. Band B supports all demodulation modes including SSB/CW with DSP and an IF receive filter.
§Dual/Single band display (per User Manual Chapter 5)
Press [F], [A/B] to toggle between dual-band (both A and B visible)
and single-band (only the selected band visible) display modes.
§Two-wave simultaneous reception (per User Manual Chapter 2)
Supported band combinations: VxU, UxV, UxU (both models), plus
Vx220M, 220MxV, Ux220M (TH-D75A only). D-STAR 2-wave simultaneous
reception is also supported.
Variants§
A = 0
Band A — amateur TX/RX (144/220/430 MHz). Index 0.
B = 1
Band B — wideband RX (0.1–524 MHz, all modes). Index 1.
Band2 = 2
Band 2 (index 2). Extended band index used internally by the firmware
for multi-band selection. Most CAT commands (e.g., FQ, MD, SQ)
only accept Band A (0) or Band B (1); sending an extended index
typically results in a ? error response.
Band3 = 3
Band 3 (index 3). Extended firmware band index — see Band::Band2
for details on CAT command restrictions.
Band4 = 4
Band 4 (index 4). Extended firmware band index — see Band::Band2
for details on CAT command restrictions.
Band5 = 5
Band 5 (index 5). Extended firmware band index — see Band::Band2
for details on CAT command restrictions.
Band6 = 6
Band 6 (index 6). Extended firmware band index — see Band::Band2
for details on CAT command restrictions.
Band7 = 7
Band 7 (index 7). Extended firmware band index — see Band::Band2
for details on CAT command restrictions.
Band8 = 8
Band 8 (index 8). Extended firmware band index — see Band::Band2
for details on CAT command restrictions.
Band9 = 9
Band 9 (index 9). Extended firmware band index — see Band::Band2
for details on CAT command restrictions.
Band10 = 10
Band 10 (index 10). Extended firmware band index — see Band::Band2
for details on CAT command restrictions.
Band11 = 11
Band 11 (index 11). Extended firmware band index — see Band::Band2
for details on CAT command restrictions.
Band12 = 12
Band 12 (index 12). Extended firmware band index — see Band::Band2
for details on CAT command restrictions.
Band13 = 13
Band 13 (index 13). Extended firmware band index — see Band::Band2
for details on CAT command restrictions.