ELRS control-link antennas are linearly polarised, not circular like video. Why one horizontal and one vertical on a true diversity receiver beats a single antenna, and why my telemetry already measures it.

The callouts come from the stock EdgeTX voice pack, not from anything I recorded. What to scrub from a model YAML before publishing it, and the positional sensor-index trap that makes a shared config misbehave silently.

Antenna placement is one of the most overlooked range factors. A perfectly tuned ELRS link loses 10–20 dB when the antenna is oriented wrong — the equivalent of cutting TX power by 90%. Why Antenna Orientation Matters Omnidirectional antennas (dipoles, linear, RHCP/LHCP) have a radiation pattern shaped like a donut — …

ExpressLRS (ELRS) is an open-source RC link protocol known for ultra-low latency and long range. Two critical settings must match between transmitter module (TX) and receiver (RX): regulatory domain and bind phrase. Regulatory Domain: FCC vs LBT (ELRS/CE) ELRS firmware is compiled for a specific radio regulatory domain …

An ELRS link is really two protocols back to back: an RF air protocol between the handset's TX module and the receiver, and a CRSF serial protocol between the receiver and the flight controller. Setup (bind phrase, domain) lives in ELRS Configuration; the OSD numbers live in RC Telemetry. This snippet is the wire- and …

Modern RC links send telemetry back from the receiver to the transmitter and OSD. Three numbers dominate: RSSI, LQ, and SNR. They measure the same link from different angles — and knowing which one to watch prevents both false alarms and missed warnings. What Each Metric Measures flowchart LR TX([Transmitter]) -->|RF …