DBHam vs RF Link

Compute distance and bearing using Maidenhead location. This was originally intended for use by amateur radio operators who participate in microwave communications however it can be used by any ham in order to determine a distance and bearing to another radio amateur. If you want to see maps of the source and target with annotations and overlays as well as be able to touch the map to determine the grid at a particular point, then take a look at our App: DBHamPlus.

RF Link brings professional-grade RF path, radio line-of-sight, Fresnel zone and path-loss analysis to your iPhone, using the Longley-Rice (ITM) irregular terrain propagation model. Built for telecom engineers, RF planners, broadcasters and wireless network designers, it delivers accurate point-to-point link evaluation for frequencies from 20 MHz to 20 GHz. Whether you are planning microwave links, Wi-Fi backhaul, LOS radio links or long-distance wireless communication, RF Link predicts terrain impact, path loss and link feasibility in seconds. KEY FEATURES ITM Longley-Rice model (20 MHz - 20 GHz) - Industry-standard Irregular Terrain Model - Accurate diffraction, scatter and line-of-sight predictions - Multiple reliability and confidence combinations Radio line-of-sight analysis - Geometric LOS check - Earth-curvature LOS with adjustable k-factor - 60% first Fresnel zone clearance - Minimum clearance at obstruction points - Suggested tower height increase Terrain elevation profiling - High-resolution elevation sampling - Plots showing terrain, curvature, LOS and Fresnel zones - Zoomable charts you can share Coverage heatmap - Signal-strength coverage area around a transmitter - Rendered over real terrain on the map Path loss and link budget - Path-loss prediction - EIRP, RSSI, SNR and link margin - Clear pass, warning and fail indicators Clean, fast interface - Map-based transmitter and receiver selection - PDF report export - Plot image sharing and saving IDEAL FOR - Wireless network planners - Microwave and LOS link engineers - UAV and drone communication designers - Amateur radio operators - Students learning RF and propagation models RF LINK PRO Every install includes a number of free calculations. RF Link Pro removes the limit, and comes two ways: - Monthly subscription: unlimited path profiles and coverage maps, billed monthly, renewing automatically. - Lifetime: a one-time purchase, no subscription. Payment is charged to your Apple Account at confirmation of purchase. A subscription renews automatically at the same price and period unless it is cancelled at least 24 hours before the end of the current period. Manage or cancel it any time in your Apple Account settings. Privacy Policy: https://pinchiyadav.github.io/RF_Link_App-privacypolicy/ Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/