Does it natively support active antennas without using a Bias-T?

No, not on this particular model. A native bias-tee of any sort will cause loss (reduction in sensitivity), regardless of design. As such, our general recommendation is to use a well-designed external bias tee whenever possible--as it can be completely removed from circuit when not needed. If impossible, or if your budget will not permit such a solution, the next best thing is having 2 SDRs, one with an active or switchable native bias-tee and one completely without such a circuit for passive antennas. Of course, if you are planning on only EVER using an active antenna with your SDR, an always-on or switchable bias-t is just fine :)Hope this helps! Please feel free to reach out to us any time with questions or concerns, and thank you for your support

Does it need driver files for Window notebook? If so, where can I get the driver?

A file named zadig appears to be magic in getting RTLSDR up and running. I just had to go back thru this again when I tried to fire up my RTL system for the first time in maybe six months. Do a web search for "zadig" and download the file from one of the sources (not many). Open it up and run the zadig.exe file. The hard part is getting the right configurations into thr zadig window. Then hit the "replace file" button. If you got it right, things should start working. I'm sure you can find more detailed and complete guidance from some web sights, in particular RTLSDR.com, but this gives you the general idea. Good luck with it - the SMArt makes quite a nice little shortwave radio with with an HF upconverter feeding the SMArt.

If I want to listen to trunked P25 or trunked DMR, are two dongles required?

Yes, you can use ONE sdr now to listen to P25 phase I and phase ii. How it works is the dongle will monitor the control channel and the transmission channel within the bandwidth of the sdr. You will get better and more calls with 2 sdrs. The key is to find the frequency of the P25 system you want to monitor and build a good antenna for it, get it elevated.

Nooelec RTL-SDR v5 SDR - NESDR Smart HF/VHF/UHF (100kHz-1.75GHz) Software Defined Radio. Premium RTLSDR w/ 0.5PPM TCXO, SMA Input & Aluminum Enclosure. RTL2832U & R820T2 (R860)-Based Radio

Nooelec RTL-SDR v5 SDR - NESDR Smart HF/VHF/UHF (100kHz-1.75GHz) Software Defined Radio. Premium RTLSDR w/ 0.5PPM TCXO, SMA Input & Aluminum Enclosure. RTL2832U & R820T2 (R860)-Based Radio

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Product ID: 30480074

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Compatible Devices
Laptop Desktop
Connector Type
SMA
Brand
NooElec
Connectivity Technology
USB
Color
black

📡100kHz-1.75GHz wide freq. range

⚙️0.5PPM ultra-stable TCXO

🖥️3.2MHz instantaneous bandwidth

Description

📡 Tune In, Stand Out: The SDR That Puts the Airwaves at Your Fingertips

COMPACT POWERHOUSE DESIGN - Sleek black aluminum enclosure with integrated heatsink fits anywhere—run multiple units side-by-side without clutter.
UNLOCK THE FULL RF SPECTRUM - Seamlessly scan HF, VHF, UHF bands from 100kHz to 1.75GHz—capture signals others miss.
CROSS PLATFORM COMPATIBILITY - Works flawlessly on Windows, Mac OS, Linux, and Android—turn any device into a high-performance SDR scanner.
ENHANCED SIGNAL TO NOISE RATIO - Up to 15dB HF and 6dB VHF/UHF SNR improvements over previous models—hear clearer, deeper, and farther.
PRECISION TUNING WITH ULTRA LOW DRIFT - 0.5PPM TCXO ensures razor-sharp frequency accuracy and rock-solid stability for professional-grade reception.

The Nooelec RTL-SDR v5 is a premium software-defined radio receiver engineered in the USA and Canada, offering an expansive 100kHz to 1.75GHz frequency range with up to 3.2MHz bandwidth. Featuring a 0.5PPM ultra-low phase noise TCXO and a durable black aluminum enclosure with integrated heatsink, it delivers superior signal clarity and stability. Compatible across major OS platforms, this compact device transforms your computer or mobile device into a versatile radio scanner capable of receiving a vast array of RF signals—from broadcast radio to air traffic control and weather satellites—making it the ultimate tool for tech-savvy professionals and radio enthusiasts alike.

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TrustScore 4.5 | 7,300+ reviews

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Good experience, but the tracking updates could be better.

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Brand Name	NooElec
Item Weight	1.06 ounces
Product Dimensions	3.54 x 0.39 x 0.39 inches
Item model number	NESDR SMArt SDR
Is Discontinued By Manufacturer	No
Color Name	black

Nooelec RTL-SDR v5 SDR - NESDR Smart HF/VHF/UHF (100kHz-1.75GHz) Software Defined Radio. Premium RTLSDR w/ 0.5PPM TCXO, SMA Input & Aluminum Enclosure. RTL2832U & R820T2 (R860)-Based Radio

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