External Triggering (Model 2306-VS Only) 6-17
Example 2. Voltage step and measure high current in a chain of GSM signal
Model 2306-VS configuration using channel 1:
*RST ‘ reset the unit
:VOLT 6 ‘ set voltage
:CURR 2.25 ‘ set current
:SENS:PCUR:FAST ON ‘ turn fast mode on
:SENS:PCUR:TIME:HIGH 500e-6 ‘ set high current time (this must be set
‘ in external triggering mode because
‘ no AUTO detection exists)
:SENS:PCUR:MODE HIGH ‘ measure high current
:SENS:FUNC 'PCUR' ‘ switch to pulse current functionality
:TRIG:EXT:STEP:VOLT ON ‘ turn ON the voltage step
:TRIG:EXT:STEP:READ AUTO ‘ switch read mode to AUTO, means
‘ 2306-VS will measure right after it is
‘ triggered
:TRIG:EXT:STEP 1,5.7,0 ’ step 1 is 5.7 volts with 0 delay
:TRIG:EXT:STEP 2,5.9,0 ‘ step 2 is 5.9 volts with 0 delay
:TRIG:EXT:STEP 3,6.1,0 ‘ step 3 is 6.1 volts with 0 delay
:TRIG:EXT:STEP 4,6.3,0 ‘ step 4 is 6.3 volts with 0 delay
:TRIG:EXT:STEP:POIN 4 ‘ set the number of points to be
‘ triggered and put into the buffer after
‘ voltage stepping.
Loop1:
:TRIG:EXT:ENAB ON ‘ turn external triggering ON. 2306-VS
‘ is waiting for the trigger signal.
monitor for the trigger out on channel 1
Loop2:
generate 4 trigger in pulses on channel 1 and look for trigger out pulses on
channel 1 - make sure a new trigger in pulse occurs after each trigger out
pulse. Trigger in pulses are ignored until the trigger out pulses. Trigger
ins detected on falling edge and trigger outs pulse low for about 10us.
:FETCH:ARRAY? ‘ get the data back
:TRIG:EXT:ENAB:INIT ‘ init external trigger to step and take
‘ another set of 4 measurements
go back to Loop 2
:TRIG:EXT:ENAB OFF ‘ when done stepping and taking
‘ measurements or desire to make
‘ changes
go back to Loop 1 after making changes
NOTE If you are unable to monitor for trigger out pulses, either:
(1) monitor the buffer full bit in the status model (Section 8), or
(2) allow sufficient time between trigger in pulses to allow the unit to complete each
step (see the specifications in Appendix A for time guidelines).
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