Now I am back in Singapore after three months plus of hard training in Mayfield Heights (Cleveland), Ohio. Now we need to set up the lab to get things done here in Singapore. The first thing to do is to buy the necessary equipment. The only thing we can not find is a precision DC source like Data Precision 8200 or HP 3245A. Data Precision 8200 http://70.150.67.5/DataSheet/DATAPRECIS/DATA_8200.pdf HP3245A http://www.testequipmentdepot.com/usedequipment/hewlettpackard/signalgenerators/3245a.htm Both are not available for sale any more. We would rather buy a new and supported equipment from a well-known vendor. We need the precision DC source to calibrate our analog I/O modules (often 16bit resolution for -10-10V and 0-20mA and better than 0.1% accuracy). Any pointers? Regards, Xiaofan -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist