Society of Robots - Robot Forum
Software => Software => Topic started by: RobD on June 02, 2008, 05:07:35 PM
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Before I fork over $170 I thought I would get some feedback from anyone that has tried the Logic Analyzer from Hobbylabs http://www.hobbylab.us/USBOscilloscope/Home.htm (http://www.hobbylab.us/USBOscilloscope/Home.htm)
I was also looking at a free utility http://www.xs4all.nl/~jwasys/old/diy2.html (http://www.xs4all.nl/~jwasys/old/diy2.html)
Any user feedback on these, if any, would be appreciated! Thanks!
Rob
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Hi:
The Oscilloscope part doesn't seem to have a high enough bandwidth to be of any real use.
Also the logic analyzer is a little slow. Microcontrollers can run at 20 MHZ
Logic analyzer:
- number of channels 16 (8 if logic generator is on)
- sample rate 1 KHz … 8 MHz
"Oscilloscope, spectrum analyzer:
- number of channels 2
- sample rate 100 Hz … 200 KHz
- memory depth
buffer reading: 1126 sample/channel (1 channel), 563 sample/channel (2 channels)
pipe reading: 64K sample/channel (1 or 2 channels)
- input voltage -20 … +20 V (hardware 2 sub-band)
- input impedance 1 MOm
- ADC capacity 10 bits
- triggering absolute (for rising/falling edge),
differential (for difference between adjacent samples),
external (for rising/falling edge of TTL levels)
- window functions Hamming, Hanning, Blackman, Blackman-Harris "
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Hey Thanks! I didn't think about the speed aspect of the logic analyzer since I've never used one before. I think I'll keep looking around for now.
I"m gonna try the homebrew analyzer this evening and see how it works with my old I2C receiver tuner I built last fall. It runs at 10MHZ.
Thanks again,
Rob