User and Programming Manual - Rev P California Instruments13. System Considerations• This chapter addresses some system issues concerning programming.13.1. IEEE InterfaceThe 801RP/1251RP can optionally be equipped with both RS232C and IEEE-488 interfaces.The desired interface is selected by moving the DIP switch position 5 to the correct mode.Only one interface can be active at a time.13.1.1. IEEE Address SelectionThe IEEE address of the 801RP/1251RP is set using the DIP switch at the rear of the unit.Switch position 4 through 0 corresponds to bits 4 through 0 of the IEEE address. SeeFigure 13-1 below.Figure 13-1: GPIB Address Selection Switch• The black section represents the switches.• The above configuration would cause the 801RP/1251RP to be in GPIB mode ataddress 10.• Listen only must be in the up position to work properly.Note: Switch setting changes do not take effect until power is cycled.13.2. RS232C InterfaceA suitable cable to connect the 801RP/1251RP AC Source to a 9 pin PC-AT style serial portis supplied with the source. If you are unable to locate this cable, you need to use a cablethat conforms to the wiring diagram shown in Figure 13-2.October 2005 RP Series50