======使用高速适配器与数字发现====== ~~ tecartile ~~数字发现是一个组合逻辑分析仪和模式发生器仪器，旨在允许您调试，可视化和模拟大多数嵌入式项目的数字信号。高速适配器和阻抗匹配探头可以与数字发现配对，以测量高达800 MS/s的逻辑分析仪。{{learn/instrumentation/tutorial / decode -vga-signals-with- Logic -analyzer/ figure 3.jpg?400|Digital Discovery with the High Speed Adapter and Logic Probes}} ==== Inventory ====以下材料与本教程一起使用:* [[//www.knowreader.com/shop/digital-discovery-portable-usb-logic-analyzer-and-digital-pattern-generator/ |数字发现]]* [[//www.knowreader.com/shop/digital-discovery-high-speed-adapter-and-logic-probes/ |高速适配器和电缆]]* [[//www.knowreader.com/shop/software/digilent-waveforms/ |波形软件]]- 3.6.8用于版本this tutorial ===== Background ===== The high speed adapter with twisted wires provides proper termination, improved bandwidth, and noise reduction to enable Digital Discovery to take higher resolution measurements. This is highly recommended for observing high speed signals exceeding 100 MHz or to look at signal phase with better than 10 ns of resolution. ===== Demonstration ===== - Connect the high speed adapter to the 2x16 High-Speed Inputs connector on the Digital Discovery. The adapter is not keyed so either orientation can be used. Note that if you are following the pin adapter diagram from the [[test-and-measurement:digital-discovery:reference-manual#accessories|Digital Discovery Reference Manual]], the pin labels may not match the ones used in tutorials on the High-Speed Adapter if it is not oriented in the same direction. - {{learn:instrumentation:tutorials:digital-discovery-with-high-speed-adapter:hsa_alongside_dd.jpg?200| High Speed Adapter next to the Digital Discovery}} {{learn:instrumentation:tutorials:digital-discovery-with-high-speed-adapter:hsa_attached_to_dd.jpg?200| High Speed Adapter attached to the Digital Discovery}} {{learn:instrumentation:tutorials:digital-discovery-with-high-speed-adapter:hsa_attached_to_dd_view_2.jpg?200| High Speed Adapter attached to the Digital Discovery}} - Attach the 2x1 housing side of the twisted wire pairs to the the adapter. The black wires will need to be attached to the grounded pins on the high-speed adapter, located on the outer rows on the high speed adapter, as the red wires have an embedded 100 Ohm series resistor. - {{learn:instrumentation:tutorials:digital-discovery-with-high-speed-adapter:twisted_wire_pairs_attached_to_hsa.jpg?200| High Speed Adapter attached to the Digital Discovery}} {{learn:instrumentation:tutorials:digital-discovery-with-high-speed-adapter:different_ends_of_the_twisted_wires_with_label.png?200| High Speed Adapter attached to the Digital Discovery}} - Attach the other end of the twisted wire pairs with the embedded 100 Ohm resistor (red wire) to the device under test. - {{learn/instrumentation/tutorials/decoding-vga-signals-with-logic-analyzer/fig-5.jpg?200|Twisted Logic Probe wires attached to a set of FPGA pins}} In the WaveForms software, a selection of high-speed pin groups are available to choose from in the upper right-hand corner of the WaveForms GUI. Currently, only these pins can be chosen for high speed inputs. {{learn:instrumentation:tutorials:digital-discovery-with-high-speed-adapter:waveforms_preset_options.png?400|WaveForms Preset Options for High Speed Inputs (click to enlarge)}} The Digital Discovery with the High-Speed Adapter can be further explored by following the [[test-and-measurement:digital-discovery:demos:decoding-vga-signals-with-logic-analyzer|Decoding VGA Signals With a Portable Logic Analyzer project]]. ---- {{tag>digital-discovery project tutorial high-speed-adapter HSA}}