Products > Test Equipment
Sniffing the Rigol's internal I2C bus
clifford:
--- Quote from: Wim13 on December 26, 2013, 09:10:10 am ---
--- Quote from: m-joy on December 25, 2013, 11:23:09 pm ---I cant understand whats so special about the 50 ohm impedanz. You can easily get a T-connnector with 50ohm Terminator so whats the point.
--- End quote ---
There is a very big difference, if you terminate directly on the chip entry, or on the BNC connector,
gives a lot of impedance changes.
--- End quote ---
For signals under 300 MHz the few centimeters of transmission line stub should not be an issue. But it nevertheless feels better to have the termination where it belongs: right at the end of the transmission line.
Git:
--- Quote from: neamyalo on December 24, 2013, 11:06:16 am ---I'm having a few issues with my JTAG probe
--- End quote ---
Thanks for your efforts on this. Did you manage to do a JTAG verify of dump file against the device?. I'm not very familiar with DS code, but there is a lot of 0xFF empty space in the dump which would make me suspicious if I had dumped it.
bigmarkslp:
Does anyone know if the USB port unlock trick works with the A series? I've been trying to decide between an non-A or A series unit, and the A series seems better from a hardware perspective.
Carrington:
--- Quote from: clifford on December 26, 2013, 10:13:00 am ---For signals under 300 MHz the few centimeters of transmission line stub should not be an issue. But it nevertheless feels better to have the termination where it belongs: right at the end of the transmission line.
--- End quote ---
And, what about the rise time?
About R2W smd marking code:
Made in China: http://www.chipdip.ru/search/?searchtext=BFR93A+%28SMD%29+SOT23
Made in Hong Kong: http://www.soltronik.pl/bfr93a-12v-50ma-6ghz-135db-sot23-tranzystor-npn/p-15171.html?osCsid=7d3806245e986140f752be4951f2c818
alank2:
--- Quote from: bigmarkslp on December 26, 2013, 05:41:00 pm ---Does anyone know if the USB port unlock trick works with the A series?
--- End quote ---
What trick is this?
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