PicoScope 7 Software
Available on Windows, Mac and Linux
Hi, C.C. 0V reference
Hi, C.C. 0V reference
Hi,
(not sure to be in the right place for the question(?)).
Using any of the four channels of the Pico 3404D, we connect the REF croco clip to the probe hook - then same ref - and expect to read about 0V on measurement tool (settings: entire trace,5ms/div, average c.c.). When setting +-20V we well get 0V, when setting +-20mV we get few µV which is ok. But when setting +-5V, we get about 35mV. How could it be? Something we need to do first ( calibration, ...?). We read the help manual but did not find any related topic.
In advance thnak you for reply and help.
Best regards
Sergium
(not sure to be in the right place for the question(?)).
Using any of the four channels of the Pico 3404D, we connect the REF croco clip to the probe hook - then same ref - and expect to read about 0V on measurement tool (settings: entire trace,5ms/div, average c.c.). When setting +-20V we well get 0V, when setting +-20mV we get few µV which is ok. But when setting +-5V, we get about 35mV. How could it be? Something we need to do first ( calibration, ...?). We read the help manual but did not find any related topic.
In advance thnak you for reply and help.
Best regards
Sergium
Re: Hi, C.C. 0V reference
It is a 8 bit scope. On the +/- 5V you have a total range of 10V
If you divide 10 / 255 = 0.039 -> 39mV
So the smallest bit you can measure is 39mV And with bit you usually get 1 of 2 LSB noise, so for a 8 bit scope this is perfectly normal.
Benno
If you divide 10 / 255 = 0.039 -> 39mV
So the smallest bit you can measure is 39mV And with bit you usually get 1 of 2 LSB noise, so for a 8 bit scope this is perfectly normal.
Benno
Re: Hi, C.C. 0V reference
Dear Benno,
Thank you for your reply that fully makes sense therorically.
Then still wonder why +-20mV and +-20V scales have the same value to reference while +-5V is different.
Thanks again
Sergium
Thank you for your reply that fully makes sense therorically.
Then still wonder why +-20mV and +-20V scales have the same value to reference while +-5V is different.
Thanks again
Sergium