The Uniden SDS100 has an average range of 20 to 50 miles, depending on terrain, antenna, and signal strength. In open areas with minimal interference, it can receive transmissions from over 50 miles away, while in cities the range may drop closer to 20 miles due to buildings and signal congestion.
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What Affects the Range of the SDS100
Antenna Quality – A longer or upgraded antenna improves reception.
Terrain – Hills, trees, and buildings can block weaker signals.
Transmitter Power – Agencies with stronger repeaters can be heard farther away.
Weather Conditions – Humidity and temperature can slightly affect reception.
Radio System Type – Digital trunked systems have shorter practical ranges than analog.
How to Improve SDS100 Range
Use a high-gain antenna like the RH77CA or Remtronix 800MHz.
Keep the scanner elevated or near a window.
Avoid metal objects and thick walls.
Consider an external antenna for vehicle or home use.
Learn More About Frequencies
For frequency databases and system maps, visit RadioReference.com — a trusted source for scanner enthusiasts.
Want to compare the SDS100 to other scanners?
Visit my Police Scanner Reviews page.
🔹 FAQ
Q: How far can the Uniden SDS100 pick up?
A: Typically between 20–50 miles depending on environment, terrain, and antenna.
Q: How can I extend the range of my SDS100?
A: Use a high-gain antenna, stay near open areas, and keep the unit elevated or near a window.
Q: Does the SDS100 have better range than the SDS200?
A: Both models have similar sensitivity. The difference in performance depends mostly on antenna setup and location.