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EFHW Fuchs ATU V3.0 · premium corrected topology v2
ATR1000 shack-side reference plane verified

顶级版把系统拆成两条真实链路:RF/DC 物理链路测量/控制闭环。ATR1000 被明确放在电台后、Bias‑T 前、靠近电台的参考面;远端 ATU 只是执行器,调谐质量由近端 SWR 仪表间接观测。

01 · RF/DC physical path Series order is the architecture: Radio → ATR1000 → Bias‑T → coax → remote ATU → EFHW Radio TX source 100W PEP · 5W tune 50Ω output ATR1000 SWR / power coupler SHACK-SIDE REFERENCE PLANE physically near / stacked with radio series element before Bias‑T Indoor Bias‑T DC injection box C block + RF choke 13.8V rides on coax Long coax feedline RF + DC transport loss / delay matters Outdoor EFHW ATU remote servo Fuchs coupler ACTUATOR, NOT A METER ESP32-S3 drives MG996R moves 10–500pF air capacitor near antenna feed point EFHW antenna wire ~20m + counterpoise measurement data leaves RF path here 02 · Measurement/control loop The loop is remote-action / local-observation: servo changes antenna-system impedance, ATR1000 observes the result at the radio end. ATR1000 SWR + forward power radio-side sample MRRC reads meter orchestrates scan WebSocket WiFi JSON control tune_start / swr_update remote command path to ESP32 03 · Remote ATU internals Low-voltage controller and high-voltage RF tank are separate physical domains. OUTDOOR UNIT BOUNDARY Bias‑T extract12V / 6V / 3V3Bias‑V ADC ESP32‑S3FreeRTOS tasksNVS + LEDC PWM MG996Rservopower cut Fuchs LCT200‑6 2:14Tair cap ≥5kVoff‑PCB HV wiringarc not locally sensed 04 · Engineering semantics Measurement plane best_swr is ATR1000 / shack-plane SWR. Not capacitor voltage. Not ATU output SWR. It optimizes what the radio sees through the feedline. Control loop Each servo step waits for a new swr_update. Network jitter, MRRC polling, meter latency directly shape sweep duration and curve quality. Tuning algorithm NVS hit → direct position; miss → sweep. 37 coarse samples @5° + 30 fine steps @1° then save freq → servo_pos ±50kHz fuzzy. Safety boundary Abort on overpower / no RF / high SWR / timeout. Still not directly detectable: RF arc, tank heat, servo position/current, water ingress, HV stress. servo move → RF impedance changes → shack-side SWR changes → next update

拓扑精确性

ATR1000 作为 RF 主路径上的近端耦合器,位于电台后、Bias‑T 前;图中不再把它误画成户外 ATU 侧支传感器。

参考面清晰

所有 SWR 优化都基于 radio-side 参考面。远端 ATU 的效果通过长同轴反射到这个参考面,被 MRRC 读取。

控制链路可审计

RF 物理路径与 WebSocket 控制路径分层画出,能看清每一步延迟/失效点:读表、MRRC、WiFi、ESP32、舵机。

安全不夸张

图中特别保留“不可直接检测”边界:电容打火、槽路温升、舵机真实位置、电流、进水等不能被 ATR1000 替代检测。