Agilent Technologies E1301B Output 722TRIG Extdcv, Output 70914OUTP on, Output 70914TRIGSOUR BUS

multimeter to an internal multiplexer. Connections are shown in Figure 4-4. This method synchronizes the computer to the instruments and relies on the computer to enter each reading and advance to the next channel in the scan list. The sequence of operation is:

1.INIT (line 50) closes channel number 100.

2.The channel closure causes a pulse on Trig Out which triggers the multimeter to take a reading.

3.When the reading is complete it is sent to the computer (lines 60 to 80).

4.The computer sends Group Execute Trigger to the multiplexer (line 90); this advances to the next channel in the scan list.

5.Steps 2 through 4 are repeated until all channels have been scanned and readings taken.

10 OUTPUT 722;"TRIG EXT;DCV"

Set multimeter to external trigger, DC voltage measurements

20	OUTPUT 70914;"OUTP ON"	Enable Trig Out port
30	OUTPUT 70914;"TRIG:SOUR BUS"

Set multiplexer to advance scan on Group Execute Trigger or *TRG

40OUTPUT 70914;"SCAN (@100:115)" Specify scan list (channels 100 to 115)

50	OUTPUT 70914;"INIT"	Close first channel (starts
		scanning cycle)
60	FOR I= 1 TO 16	Loop through following lines
		16 times
70	ENTER 722;A	Enter reading (computer waits
		until reading taken & received)
80	PRINT A	Print reading
90	TRIGGER 70914	Trigger multiplexer; advances

to next channel

100 NEXT I

110 END

Using the Mainframe 4-5