Aim tti ql564 0 56v 0 4a single power supply aim tti ql564 sii p the aim tti single ql564 sii offers an unparalleled level of precision voltage and current are controlled using instrumentation quality 16 bit dacs enabling voltages to be set to 1mv resolution even at full output voltage indeed the accuracy is sufficient for the ql to be used as a calibration source for some hand held dmms p p the aim tti single ql564 sii provides multiple ranges for increased current capabil