RX-666 ADC SDR Receiver Radio 1KHz-1800MHz 16Bit Sampling 32MHz Real Time Bandwidth TCXO 0.1PPM

RX-666 ADC SDR Receiver Radio 1KHz-1800MHz 16Bit Sampling 32MHz Real Time Bandwidth TCXO 0.1PPM

Specifications:
- Model: RX-666
- Size:110*85*25mm
- High performance, high dynamic, high sensitivity, no mirror image. Shortwave 32M at a glance!
- Support for software HDSDR customized version, SDRSHARPER customized version
- USB3.0 interface power supply (spare external 5V power supply / no external power supply required)
- Dual antenna interface: LW / HF and V / UHF (interface type: SMA outer screw inner hole)
- Frequency range: 1KHz-1800MHz (guarantee index 1KHz-1500MHz)
- Stainless steel housing
- Heat dissipation method: shell contact passive heat dissipation

Package Included:
- 1 x SDR Receiver Host
- 1 x USB 3.0 Data Cable
- 1 x Software (provided network disk download)

Operating Environment Requirements:
Support for windows 7, win 8, win 8.1, win 10.
 
The computer performance is based on the desktop computer: i5 3570 4G memory can run smoothly, 32M bandwidth USB3.0 data, there are certain requirements for computer performance. Multiple machines can be connected to a computer at the same time to run in different frequency bands.

Advantages:
- 1KHz-1800MHz. No mirroring.
- ADC adds anti-jitter, anti-interference functions, SMA dual antenna interface, USB3.0 direct power supply. Excellent performance indicators, stainless steel laser cut shell, stainless steel hexagon socket screw fastening, heavy and heavy, strong texture.
- 16bit ultra-high sampling, 32M bandwidth.
- ADC chip uses LTC2208, 16BIT 32M direct sampling, high sampling bandwidth of 32M! The rate of LTC2208 is much higher than LTC2217, the noise is also 2db lower than that of LTC2217, the throughput is very large.
- It is necessary to use a high-performance computer equipped with USB3.0 interface to run it smoothly.

Applications:
- Telecommunications
- Receiver
- Cellular base station
- Spectrum analysis
- Imaging system
- ATE (Automatic Test Equipment)


① Delayed power supply
②AP7361 low dropout voltage regulator
③ Passive coupling common mode suppression
④AP7361 low dropout voltage regulator
⑤Signal coupling, eliminate common mode signal, greatly reduce the harmonic interference of crystal
⑥ Delayed power supply
⑦Intermediate frequency passive coupling, common mode suppression interference
⑧0.1PPM low temperature TCXO temperature compensation crystal
⑨ Schematic diagram of high-quality differential crystal

The spectrum is further enlarged and viewed. The local PCB is a 4-layer board structure. The middle layer has full-area bottom line shielding and isolation. Minimize power and signal interference, the effect is obvious. The effect of using a 4-layer PCB for a high-frequency RF circuit over a 2-layer structure:

The short-wave signal is dense and dense, and the reference crystal signal uses the differential principle to effectively suppress the frequency-doubled harmonics of the oscillation source, and the advantages of using a passive transformer coupling are reflected once again. The signal purity is much purer than direct coupling! Harmonics and interference outside the transformer's operating band are all gone:

Screenshots of shortwaves at different bandwidths. The effect of increasing the preamplifier for long-wave medium-wave and shortwave is not easy to cause signal overload, and the noise is also amplified together. The deterioration of the signal-to-noise ratio does not help the sensitivity at all. Why does the front end abandon NA? The signal-to-noise ratio, the picture explains everything:

Whole circuit uses a 4-channel LDO independent regulated power supply to supply power. It is not the LM1117 low-end regulator used in some stores. The 4-channel regulator chips of this machine are more than 10 times more expensive than the low-cost chips of the 1117 series. It is low ripple and the spectrum is clean:

Medium wave and long wave signal spectrum. Every 9k is a 40KHz, 60KHz long wave radio station clear reception, common mode transformer circuit advantages are prominent, common mode suppression greatly eliminates interference: