Enter the average UHF frequency (500 to 950 MHz) to your transmitters, cable type (RG-58, LMR-240, LMR-400), and cable length. It estimates 50-ohm coax loss and suggests an SF1 gain that offsets the loss while leaving a bit of headroom.
The result: fewer overloads, steadier wireless microphone and IEM links, and more predictable range. Use before every show—whether you’re on a broadcast cart, mixing live sound, wiring theater, supporting a house of worship, or rolling on a film set—to decide how much gain to add at the antenna, when to shorten a cable run, or when it’s time for lower-loss coax. In short, it helps your log-periodic antennas RF amplifier ( like the Deity SF1’s RF amp) lock in cleaner reception across wideband UHF (470–960 MHz) with less guesswork.
Notes
● In crowded RF, start a dB or two lower than the table suggests; if the overload LED flickers, step down again.
● These are rule-of-thumb values (loss per 100 ft) based on typical specs; always check your cable’s datasheet for mission-critical work.
● The Suggested SF1 Gain column keeps ~1 dB headroom and caps at +21 dB.