MJLorton Solar Power and Electronic Measurement Equipment Forum
General Category => General Discussion => Topic started by: eeze on January 04, 2014, 10:43:25 AM
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hi, i would like to ask a question, but first i want to say thank you for the fantastic videos on youtube they really are excellent.
i recently bought my first oscilloscope the hantek 1008c i basically want to do automotive diagnostics, i bought some 10 x probes 100mhz but as i have read in various articles it seems that for automotive work they suggest using a 20-1 attenuator . would i be correct in thinking that if i set the probe to x10 then back probed the sensor that i want to check with a 10 mΩ resistor and connect the probe to the resistor this would actually give me a total attenuation of x20, if i am correct what size resistor should i use 1/2 watt or bigger, thanks for any advice eeze.
hi.as no one seemed to know the answer to my question, i will give an update for any one that is interested, after researching the matter i found that a 10ΜΩ resistor requires 16PF capacitor as a filter. could not find 16PF so i used 15PF at 3KV and a 1 WATT 10 ΜΩ resistor and calibrated the probe to correct the signal.
with the probe set to X10 and the 10 ΜΩ resistor with the 15PF capacitor piggy backed i get an excellent 20-1 attenuator with excellent signal. i made 8 of them for about €3 a bit cheaper than pico scopes attenuators at €80 each.
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hi, i would like to ask a question, but first i want to say thank you for the fantastic videos on youtube they really are excellent.
i recently bought my first oscilloscope the hantek 1008c i basically want to do automotive diagnostics, i bought some 10 x probes 100mhz but as i have read in various articles it seems that for automotive work they suggest using a 20-1 attenuator . would i be correct in thinking that if i set the probe to x10 then back probed the sensor that i want to check with a 10 mΩ resistor and connect the probe to the resistor this would actually give me a total attenuation of x20, if i am correct what size resistor should i use 1/2 watt or bigger, thanks for any advice eeze.
hi.as no one seemed to know the answer to my question, i will give an update for any one that is interested, after researching the matter i found that a 10ΜΩ resistor requires 16PF capacitor as a filter. could not find 16PF so i used 15PF at 3KV and a 1 WATT 10 ΜΩ resistor and calibrated the probe to correct the signal.
with the probe set to X10 and the 10 ΜΩ resistor with the 15PF capacitor piggy backed i get an excellent 20-1 attenuator with excellent signal. i made 8 of them for about €3 a bit cheaper than pico scopes attenuators at €80 each.