[XCM-017] A/D, D/A Demonstration. Display a video signal on DSO Nano V2 using Xilinx Hi-speed Transceiver.
Display a video signal on DSO Nano V2 using Xilinx Hi-speed Transceiver.
This is an A/D and D/A demonstration using an XCM-017, Xilinx Virtex-5 LXT FPGA board, and a Liner Technology LTC2274 evaluation board.
The XCM-017 imports an analog VGA signal (100Msps) and sends data to a D/A converter in slow speed. The DACed analog signal is displayed on Seed Studio, DSO Nano V2. This demonstration is just an example for reference.
|Virtex-5 LXT FPGA Board||XCM-017||HuMANDATA|
|SIF40 to MMCX Conversion Boad||ACC-010||HuMANDATA|
|A/D Converter||LTC2274 Evaluation board||Liner Technology|
|Pocket size Oscilloscope||DSO Nano V2||Seed Studio|
|Video pattern generator||GV-241||PROMAX|
The Pattern generator (GV-241) outputs high frequency signals for DSO Nano. In order to monitor signals with DSO Nano, the FPGA slows the rate of data down in 1/100 of original and outputs to UTL-012, isolated 16-bit D/A conversion board, to convert digital data to analog data.
Top is slow-downed waveform by FPGA. A down pulse is added manually for capture.
DC component of a signal is not replayed in DACed waveform because of a limitation comes from A/D converter’s input circuit (About 100kHz or below will be cut off). High-frequency component of signal is reduced its amplitude because of a limitation comes from D/A converter’s slew rate.
Captured A/D data in Virtex-5. (using ChipScope)
Test video signals make a monochrome striped pattern on a monitor. Sparse and dense pattern matches with above waveform.
Captured waveform （DSO NANO V2)
As you can see, video signal was captured by an affordable oscilloscope.
This demonstration is just only for a demonstration and has no practicality. But we are grad if this gives you some hints for using our products.
GTP Transceiver Setting
- Reference Clock : GREFCLK 100MHz （Multiple on-boarded 50MHz into 100MHz by PLL)
About DSO Nano V2
We hope you find this demonstration informative.