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| The [https://www.uugear.com/product/vu-gpsdr/ VU GPSDR] is an expansion board designed for the [[Vivid Unit Extender]], transforming your Vivid Unit into a fully integrated, touch-enabled software defined radio (SDR) platform. | | The VU GPSDR is an expansion board designed for the Vivid Unit Extender, transforming your Vivid Unit into a fully integrated, touch-enabled software defined radio (SDR) platform. |
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| <pic src="images/7/7b/VU_GPSDR.jpg" width="80%" align="text" caption=""></pic>
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| VU GPSDR integrates GPS-Assisted clocking, an HF upconverter, dual configurable encoders, ADS-B aircraft tracking, and real-time map visualization in a compact form factor. | | VU GPSDR integrates GPS-Assisted clocking, an HF upconverter, dual configurable encoders, ADS-B aircraft tracking, and real-time map visualization in a compact form factor. |
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| <pic src="images/0/02/S03.jpg" width="80%" align="text" caption=""></pic>
| | Combined with the GPSDR++ software (based on SDR++ v1.2.0), the VU GPSDR offers a ready-to-use SDR station with precise timing, wide frequency coverage, and an intuitive interface. The source code of GPSDR++ is available on GitHub. |
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| Combined with the GPSDR++ software (based on SDR++ v1.2.0), the VU GPSDR offers a ready-to-use SDR station with precise timing, wide frequency coverage, and an intuitive interface. The source code of GPSDR++ is [https://github.com/uugear/GPSDRPP available on GitHub]. | |
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| == Specifications ==
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| * '''Tuner:''' Rafael Micro R860
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| * '''ADC:''' Realtek RTL2832U
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| * '''GPS Module:''' u-blox NEO-M8N
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| * '''MCU:''' STM8S003F
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| * '''Frequency Range:''' 500 kHz – 1.766 GHz
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| * '''Bandwidth:''' up to 3.2 MHz (2.4 MHz recommended for stability)
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| * '''HF Upconversion:''' 108 MHz LO for signals below 30 MHz
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| * '''Local Oscillator:''' Si5351, driven by 24 MHz PPS from GPS
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| * '''Input Connector:''' 1 × SMA (SDR antenna input)
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| * '''Output Connector:''' 1 × SMA (software-adjustable clock output)
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| * '''Bias Tee:''' No Bias-Tee on SDR antenna input; 5 V Bias-Tee on GPS antenna (IPEX 1st gen) connector
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| * '''Transmit Capability:''' None
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| == Usage ==
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| Start GPSDR++ from the Application menu, or just run "gpsdrpp" in the terminal.
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| GPSDR++ will start as a full-screen application, and its interface looks like this:
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| The toolbar at the top contains controls for showing/adjusting SDR parameters (on/off, volume, frequency, tuning mode, SNR etc.). The SDR++ menu is hidden by default — you can tap the button in the upper-left corner to toggle the visibility of the menu and/or sidebar.
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| The sidebar provides several functional pages, such as Radio, Mode S/ADS-B, GPS, and CLK OUT. You can switch between these pages using the two navigation buttons at the bottom of the sidebar.
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| The main view contains two tabs — Waterfall and Map — and you can switch between them by tapping on the tab header.
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| By default, when you are facing the screen:
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| * The left encoder controls the zoom level of the waterfall view.
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| * The right encoder controls the tuning frequency.
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| You can change their functionality by pressing the buttons next to each encoder.
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| On the radio page, you can turn AGC on/off, adjust the gain, and specify the demodulation mode.
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| To enable ADS-B reception, go to the Mode S/ADS-B page and tick the checkbox at the top. When aircraft are detected, they will also appear in the Map tab within the main view.
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| To monitor GPS satellite signal strength, navigate to the GPS page. To show your surrounding geography, activate the Map tab.
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| To enable the clock signal output, go to the CLK OUT page and tick the checkbox at the top.
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The VU GPSDR is an expansion board designed for the Vivid Unit Extender, transforming your Vivid Unit into a fully integrated, touch-enabled software defined radio (SDR) platform.
VU GPSDR integrates GPS-Assisted clocking, an HF upconverter, dual configurable encoders, ADS-B aircraft tracking, and real-time map visualization in a compact form factor.
Combined with the GPSDR++ software (based on SDR++ v1.2.0), the VU GPSDR offers a ready-to-use SDR station with precise timing, wide frequency coverage, and an intuitive interface. The source code of GPSDR++ is available on GitHub.
