Coverage Map

Set the transmitter using a grid locator, coordinates, or by dragging the map marker. Map clicks do not move it. Your settings are saved in this browser.

Analysis mode

Map analysis

Transmitter

Maidenhead locator (4 or 6 characters)

Latitude (°)

Longitude (°)

Band / frequency preset

Nominal starting frequencies; you can enter a different value below.

Frequency (MHz)

Antenna height AGL (m)

Transmit power (W)

TX antenna gain (dBi)

TX feed line loss (dB)

Saved transmitters

Profile name

Saved profile

Profiles are stored only in this browser. Loading one sets the transmitter fields; it does not start an analysis.

Receiver

Receiver profile

Estimated receiver sensitivity (dBm)

RX antenna gain (dBi)

RX antenna height AGL (m)

RX feed line loss (dB)

Profile values are approximate starting points. Adjust them for the selected radio and antenna.

Coverage area

Radius

Grid resolution

Grid spacing is calculated from the selected radius.

Up to 2,500 cells per calculation. Radius and resolution determine grid spacing.

Map overlay opacity: 55%

Set the transmitter using a grid locator, coordinates, or by dragging the map marker.

Estimated received power (dBm)

The received power range will appear after calculation.

Only cells above the selected receiver threshold are shown. Signal quality is shown as Marginal / very weak, Weak, Fair, Good, or Excellent.

The 5-bar indicator is an estimate based on the selected receiver profile, not a calibrated S-meter.

Receiver threshold: -121 dBm

Estimate only. Actual results depend on terrain, antennas, interference, and equipment. Rain, troposcatter, and ducting are not included.

Drag the marker or right-click the map to move the transmitter