Welcome to the RF-Connect SDR Hardware information page. We are the premier provider of COTs SDR USB SDR. Our goal is to provide the very best in USB SRD with improvement and optimizations of the low cost SDR USB devices. Because our quality control standards are high, our Engineers are among the best in the business. Our goal is to always deliver SDR USB devices that last. We want you, our valued customer, to be happy. Here is a short list of our improvements to the standard low cost USB SDR device.
1. To improve ESD/EOS reliability, added RF input port and I2C bus ESD protection circuit.
2. Minimized the RF trace from RF connector to device RF input pin..
3. Protected RF traces with ground traces and guard rings.
4. Used shielded connectors with all shields connected to the ground plane with low impedance connections.
5. Minimized the ground path to device E-pad for the crystal.
6. Placed crystal away from RF traces.
7. Protected crystal traces with ground traces and guard rings.
8. The crystal amplifier oscillator has a dedicated power supply pin (Pin11), which should be carefully decoupled to ground with minimal lead lengths in order to minimize board noise from coupling into the reference clock.
9. Moved system clocks and frequently switched signals should away from crystal and RF trace.
10. Placed AGC filter and CP filter circuits as close to the device as possible.
11. Minimized the CP filter ground path to device E-pad.
12. System digital traces routed away from RF traces.
13. Placde ceramic DC bypass capacitors as close to the device as possible. This insure that the power goes through the capacitors before power goes through the VIAs to the power plane
14. Multi layer board with power and ground on separate dedicated layers
New and improved SDR Hardware
If you’ve ever been curious about software defined radio (SDR), this USB stick is the easiest way possible to have fun with a powerful, configurable receiver. Packed with the powerful RTL2832U and R820T tuner, it can tune into signals from 24MHz to 1850MHz. That means you can use a computer (with Windows, Mac, or Linux) to tune into: FM Radio, AM signals (but not AM radio), CW (morse code!), unencrypted radio signals (such as those used by many police and fire departments), POCSAG pagers, and more.