DXPatrol MK4 Wideband SDR Receivers are a compact, high‑performance wideband SDR receiver offering seamless coverage from 100kHz to 2GHz. With its built‑in HF up‑converter, precision band‑filters, and excellent strong‑signal handling, it delivers clean, reliable reception across the entire spectrum. Dual independent SMA antenna inputs let you connect optimized HF and VHF/UHF antennas simultaneously, while software‑selectable modes provide flexible tuning and fast spectrum sampling up to 3.2 MS/s. Housed in a rugged, shielded aluminum enclosure, the MK4 works effortlessly with popular SDR apps on Windows, Linux, Android, and iOS, enabling everything from aircraft ADS‑B tracking and NOAA satellite reception to amateur‑radio monitoring, RF analysis, and general RF exploration. Powerful, portable, and endlessly versatile—the DXPatrol MK4 opens the door to the full radio spectrum.

Building upon its advanced wideband architecture, the DXPatrol MK4 delivers the same seamless 100 kHz–2 GHz coverage found in professional‑grade SDR platforms, far surpassing the performance of basic USB DVB‑T dongles. Its integrated HF up‑conversion stage and precision band‑filtering ensure excellent dynamic range, strong‑signal tolerance, and exceptionally clean reception across HF, VHF, and UHF bands. The independent SMA inputs for HF and VHF/UHF allow operators to connect multiple antennas connected without re‑cabling, while software‑controlled switching between direct‑sampling and Q‑signal sampling modes provides flexible, optimized performance across the entire spectrum. Supporting sampling rates up to 3.2 MS/s, the MK4 enables wide, instantaneous spectrum displays—from 96kHz to nearly 1MHz—depending on the SDR software in use.

Fully compatible with virtually all RTL2832‑based software, the MK4 performs flawlessly with applications such as HDSDR, SDR‑Radio, SDR Touch, GNU Radio, and others. It also supports specialized tools including dump1090 for ADS‑B aircraft tracking and programs designed for receiving NOAA weather satellites at 137MHz, making real‑time flight awareness and satellite image reception straightforward and reliable. Whether used for public‑safety monitoring, HF/VHF/UHF/ Amateur Radio listening, educational experimentation, or advanced RF signal analysis, the DXPatrol MK4 provides a powerful and flexible platform for exploring every corner of the radio spectrum.

Setup is simple and efficient: users typically install the recommended Zadig USB driver rather than stock Windows drivers, and the receiver connects via a USB-A to USB-C cable (included) providing data and power to the MK4. Android operation is supported through SDR Touch when used with compatible OTG‑capable smartphones or tablets. The MK4’s rugged, shielded aluminum enclosure houses a high‑performance preamplifier with excellent IP3 characteristics, robust front‑end protection, gold‑plated SMA connectors, and highly efficient band‑filters for clean audio and stable operation. With native support for Windows, Linux, Android, and iOS devices, the DXPatrol MK4 stands as a compact, durable, and exceptionally capable SDR solution for beginners, advanced experimenters, and serious RF hobbyists alike.

Fully Compatible with PC & macOS SDR applications like:

• HDSDR

• SDR‑Radio

• SDR Touch

• GNU Radio

• Others

Which signals and services can be monitored with DXPatrol?

The DXPatrol can be used as a wide band radio scanner to listen to:

• Public Safety & Utility Monitoring – Monitoring unencrypted Police/Fire/EMS – Monitoring cordless phones & baby monitors – Receiving wireless sensors (temperature, power meters)

• Aviation & Maritime Monitoring – Listening to ATC & ACARS – Tracking aircraft via ADS‑B – Tracking ships via AIS

• Digital & Trunked Radio Monitoring – Scanning trunked systems – Decoding unencrypted digital voice – Decoding POCSAG/FLEX pager traffic

• Weather, Scientific & Balloon Tracking – Tracking weather balloons – Tracking high‑altitude balloon payloads – Receiving NOAA weather satellite images – Meteor scatter monitoring – Radio astronomy

• Amateur Radio Activities – Listening to VHF ham radio – Decoding APRS packets – Listening to satellites & ISS – Using as a Panadapter

• Broadcast Monitoring – Listening to FM + RDS – Listening to DAB – Watching analogue TV

• RF Analysis & Engineering – Spectrum analyzer use – Sniffing GSM – Reverse engineering RF protocols – Triangulating signal sources – Finding RF noise sources – Measuring filters & antenna SWR – High‑quality entropy source – Noise figure indicator

• Navigation & Portable Applications – Receiving & decoding GPS – Using with Android as a portable scanner

• and MORE!

Installation Tech Tip