Low Voltage Power supply for QWAD
We are using Agilent 3633A Low Voltage linear power supply (User Guide). We are using this unit in the mode which has 8V maximum voltage output.
We are using two units, one being used for -5V and GND and the second configured to give GND and +5V. The PS(power supply) unit giving +5V sends a current of 1.60A, whereas the unit giving -5V has a current of 0.37A. The load of this PS (QWAD boards) have a very low output impedance (~3.2 ohm) whereas the 200 feet of cable (10 AWG) between the PS and the QWADs would have a resistance close to 3.2 ohm. In this situation the sense cable may not work since the sense cable connection requires the lead cable resistance to be "much" less than the load.