XtremeDx K160-1 RF Sampler Board

XtremeDx K160-1 RF Sampler Board - Dedicated for HF beamforming

- PCB - 16L, controlled impedance

- FPGA - Kintex 7 - K160 / K325 / K410 

- A/D - 4x 130 / 160 MSPS, 16b  - LTC2208 /  LTC2209 - LVDS connection

- D/A 1x 2 channel 500 MSPS, 14b - LVDS connection

- High speed connections - PCIe 3 x4, SFP, 2x USB3 (connected to MGT, and via FTDI FT601), 2x SATA, MIPI DPHY (output),

 - I/O CON { I2S, SPI (LVDS connections), GPIOs }, 2x PLL - LVDS out for processor board sync 

- System Clock - used for A/D and D/A and can be used for onboard synthesizer reference clock 

- Clock Synthesizer - used for D/A and for PCIe/SFP/(MGT) reference clock

- External System Clock input - U.FL connector - connected to Clock Distributor - for multiple board synchronization

- Sync'd PWR supply on separate board (not showed)

PCB Bottom side

PCB TOP side

PCB TOP side

    One HS signal layer 

SOM module - 4-core ARM Cortex A53

- 4x 1.5 GHz ARM Cortex A53 core

- 2 - 4 GB LPDDR4

- eMMC, NOR FLASH

- High Speed Hirose Connectors

        - MCSI, NCSI, HDMI, LVDS display, 2x I2S, I2Cs, SPI ,...

- Sync power supply and high DCDC noise reduction (for SDR applications)

- 4x USB2 

 PCB development in progress.

XtremeDx SDR - USB3/FT601 interface implementation

Implementation of USB3.0 Super-Speed 32 bits Sync FIFO interface 

- device connected

- 1V8 I/O voltage, 67 MHz bus CLK 

- written interface code in VHDL

- interface simulation using a few data bytes

- the loopback test is working with 1kB data

- PC app - FT601 loopback demo app

Zoomed

FT601 interface VHDL code - part 1 - the concept

XtremeDx H7113R Transceiver - back side PCB and plate

HF Tx router

I2C controlled HF Tx router 

- 50 MHz Nyq filter

- Tx preamplifier

- preamplifier BIAS on/off by i2c

- direct signal routing on/off by i2c

- fixed value ATT on preamplifier in/out

- DC blocking and ESD protection at input

RF HF router

I2C controlled HF RF router

Contains DC blocking, ESD protection, overvoltage protection, step-ATT, HPF, NYQ filter, 20 dB preamplifier and RF-ports for external modules.

XtremeDx H7113R Transceiver assembly

 The front panel and PCB for XtremeDx H7113R SDR

(not real scale)

    

4L PCB, The bottom layer

Top view, all layers

STM32 controller. Diff RF decoupled from 12VDC power supply. 7 ADC multiplexed inputs for DC U/I measurements as RFDSP voltage and current, PA voltage and current, VSWR voltages on VSWR bridge). Hole for one optical encoder. Holes for two mechanical rotary encoders - MULTI and ATT, one analog potentiometer for volume control on ADC. All inputs are RF and ESD protected. USART for communication with baseboard. (this architecture was tested in my H7R SDR) 

Front panel and PCB assembly

 

The front panel + the display

    

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