Re: external time base changes with velocity

2004-03-25 Thread wayuu
Hello everybody Jorge, thank you so much for your help. I tried changing interchannel delay and the acquisition of two analog channels was all right (at 2000 rpm), altough this not worked acquiring three channels. I calculated the delay this way: (60/rpm)*(1rev/1024S)*(1/number of channels). Is

Re: external time base changes with velocity

2004-03-23 Thread wayuu
acquires the number of cycles that I expected (also at 2000 rpm), but If I acquire two channels the problem comes back. I don=B4t know what to do. I really appreciate if somebody can help me. Kind regards. Wayuu

external time base changes with velocity

2004-03-21 Thread wayuu
Hi everybody I am using output channel A of a quadrature TTL encoder as external time base of the acquisition of three analog input signals. I acquire a total of 1024 scans, one scan for one pulse of the encoder. I use this system to acquire signal from an internal combustion engine. When the veloc