Mustapha, That's right, 10Hz is too slow for the human eye to perceive as a waveform, = rather than a "moving dot". The dot has to go across the screen in less tha= n = about 1/16 of a second in order for you to see the continuous waveform. Best regards, Vitaliy ----- Original Message ----- = From: "ELKEJBOUT Mustapha" To: Sent: Friday, April 13, 2007 09:51 Subject: [EE]oscilloscope Hi Alan B. Pearce, thank you for your answer. Thus, you mean that with a simple analog = oscilloscope (CQ5020F) we can't have a stable low frequency signal (like = 10hz...). I want to be sure of that because I am trying different settings = on my oscilloscope in order to stablize the signals on the screen in vain. thank you in advance, best regards, Mustapha ELKEJBOUT --------------------------------------- "Every one has to do what he can do according to how it can be truly done" For whom the bell tolls, Ernest Hemingway. --------------------------------- D=E9couvrez une nouvelle fa=E7on d'obtenir des r=E9ponses =E0 toutes vos q= uestions = ! Profitez des connaissances, des opinions et des exp=E9riences des = internautes sur Yahoo! Questions/R=E9ponses. -- = http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist = -- = http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist