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Or tec 974/994/995/997 NIM Timer s and Countersconfig file:RS_OR9XT = device_name baud_rate number_of_countersGP_OR9XT = gpib_address number_of_countersRS_OR9XC = device_name baud_rate number_of_countersGP_OR9XC = gpib_address number_of_countersRS_OR9XB = device_name baud_rate number_of_countersGP_OR9XB = gpib_address number_of_countersedconf devices screen:SCALERS DEVICE ADDR MODE NUM TYPEYES /dev/tty1 9600 4 Ortec 974/994 Counter/Timer (Serial)YES 3 4 Ortec 974/994 Counter/Timer (GPIB)YES /dev/tty2 9600 2 Ortec 974/994/995/997 Counter (Serial)YES 3 2 Ortec 974/994/995/997 Counter (GPIB)YES /dev/tty3 9600 3 Ortec 994 Blind Timer/Counter (Serial)YES 3 3 Ortec 994 Blind Timer/Counter (GPIB)edconf scalers screen:NUMBER NAME MNEMONIC DEVICE UNIT CHAN USE AS SCALE FACTOR0 Seconds sec OR9XX 0 0 timebase 10001 Monitor mon OR9XX 0 1 monitor 12 Detector det OR9XX 0 2 counter 1spec supports the Ortec 974, 994, 995 and 997 counter and counter-timer NIM modulesover both GPIB and RS-232 interfaces. When running the configuration editor,select from the above descriptions on the device configuration screen to specify whichOrtec modules you are using and how you are using them.Only one module can be selected as a counter/timer. The 974 module can be assignedamaximum of four channels. The 994 should be assigned two channels normally andthree channels when used as a blind timer. The 995 has two channels and the 997has one.On the scaler configuration screen, choose OR9XX as the controller for all channelsassociated with an Ortec module. The unit numbers selected for each channel correspondto the order the Ortec modules appear on the device configuration screen.When using the 994 as a blind timer, you must select channel number 2 for the timebase.Using the 974The 974 is a four-channel counter/timer having a minimum 0.1 second time base.Youshould connect the monitor counts through a tee to the EXT IN connector on theback of module and to the COUNTER INPUT 2 connector on the front of the module.Use the COUNTER INPUT 3 and 4 connectors for one or two detector inputINTERIM WORK-IN-PROGRESS (8/16/01) NOT FOR GENERAL DISTRIBUTION HARDWARE REFERENCE 257