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| Interfacing a Rigol LH1116 Active Logic Head onto a Cypress FX3 16ch 100MHz LA? |
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| LinuxGuy123:
I am in need of a PC based 100MHz logic analyzer for a project. I don't have $$$ for a commercial unit. The Cypress EZ-USB FX3 Explorer kit can be used as a 100MHz logic analyzer with Sigrok PulseView. https://community.infineon.com/t5/Knowledge-Base-Articles/EZ-USB-FX3-Explorer-kit-as-16-channel-100-MHz-logic-analyzer-with-sigrok/ta-p/283993 https://www.infineon.com/cms/en/product/evaluation-boards/cyusb3kit-003/?utm_source=cypress&utm_medium=referral&utm_campaign=202110_globe_en_all_integration-dev_kit The FX3 could also be used to generate signals or interface directly to a variety of devices - I2C, SPI, etc. It is a programmable device and could do many things if one took the time to program it. Cypress provides many examples such as memory device programming, etc. The I/O on the FX3 is unbuffered and unprotected. It will operate at a variety of input voltages from 1.2 to 3.3V. I have an unused Rigol LH1116 Logic Head. Does the LH1116 have built in buffering ? Does it have over voltage protection ? What is its input voltage range ? My LH1116 says "Max +/-40V". It also says Input Z: 100Kohm. Does the head convert +/-40V to logic level (3.3V ?) What would it take to interface the LH1116 to the FX3 ? Does someone have a pinout for it ? What connector does the LH1116 ribbon cable mate to ? Thanks |
| thm_w:
What is the budget. What is the bandwidth requirement for how many signals. DSLogic Plus can be had for $100 with sample rates up to 400MHz (4 channel buffered) https://www.dreamsourcelab.com/shop/logic-analyzer/dslogic-plus/ |
| LinuxGuy123:
Thanks for the link. The DSLogic looks like a great product. I'm going to use the FX3 because I need to generate some signals in order to test the DUT. |
| thm_w:
Are you expecting to generate and monitor signals simultaneously using the FX3? Does sigrok support that? Maybe start with generating and buffering signals first. --- Quote ---What is its input voltage range ? My LH1116 says "Max +/-40V". It also says Input Z: 100Kohm. Does the head convert +/-40V to logic level (3.3V ?) --- End quote --- 40V max, if its active maybe its buffering it, you'd have to open it up. With the dslogic its just a passive probe: https://sigrok.org/wiki/DreamSourceLab_DSLogic_Plus You can read some of the threads here around logic analyzer board design if you really want to get into the details. |
| LinuxGuy123:
--- Quote --- Min/max voltage -0.6V — 6V, +-30V with provided probe-wires --- End quote --- Whatever that means. |
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