Example 2 Create a trigger source that will trigger an output transient (step or list) whenever the
output current is between 2.1 A and 2.7 A:
Front Panel Menu Reference
SCPI Command
Select System\Signal\Threshold.
Select voltage comparator 1 (Threshold 1) from the dropdown list. Select Current
from the Function list. Enter 2.1 in the Level field. Select > from the Operation list.
Select voltage comparator 2 (Threshold 2) from the dropdown list. Select Voltage
from the Function list. Enter 2.7 in the Level field. Select < from the Operation list.
Select System\Signal\Define.
Select Expression 2 in the dropdown list.
Enter "THR1 And THR2" in the text field.
You can enter any value from the numeric keypad. For additional characters, use
the up/down navigation keys to enter an alpha character by scrolling through the
selection list that appears when you press the keys. Use the left/right navigation
keys to traverse the text field. Use the backspace key to delete a value. Press Enter
when you are finished.
Select Transient\TrigSource.
Select Expr2 from the Transient trigger source list.
Program the threshold comparators. (GT = greater than;
LT = less than)
SENS:THR1:FUNC CURR
SENS:THR2:FUNC CURR
SENS:THR1:CURR 2.1
SENS:THR2:CURR 2.7
SENS:THR1:OPER GT
SENS:THR2:OPER LT
Program the signal expression.
SYST:SIGN:DEF EXPR2, "THR1 And THR2"
Program the output trigger source.
Example 3 Create a custom protection that will disable the output if the output voltage moves outside
the window between 23.5 V and 24.5 V:
Front Panel Menu Reference
SCPI Command
Select System\Signal\Threshold.
Select voltage comparator 3 (Threshold 3) from the dropdown list. Select Voltage
from the Function list. Enter 23.5 in the Level field. Select < from the Operation list.
Select voltage comparator 4 (Threshold 4) from the dropdown list. Select Voltage
from the Function list. Enter 24.5 A in the Level field. Select > from the Operation
list.
Select System\Signal\Define.
Select Expression 3 in the dropdown list.
Enter "THR3 Or THR4" in the text field.
You can enter any value from the numeric keypad. For additional characters, use
the up/down navigation keys to enter an alpha character by scrolling through the
selection list that appears when you press the keys. Use the left/right navigation
keys to traverse the text field. Use the backspace key to delete a value. Press Enter
when you are finished.
Select System\Signal\Protect
Select Expr3 from the dropdown list. Then select Enable.
Program the threshold comparators. (GT = greater than;
LT = less than)
SENS:THR3:FUNC VOLT
SENS:THR4:FUNC VOLT
SENS:THR3:VOLT 23.5
SENS:THR4:VOLT 24.5
SENS:THR3:OPER LT
SENS:THR4:OPER GT
Program the signal expression.
SYST:SIGN:DEF EXPR3, "THR3 Or THR4"
Program the output protection state.
OUTP:PROT:USER:SOUR EXPR3
OUTP:PROT:USER:STAT ON
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4 Using the Advanced Power System
Summary of Contents for N6900 Series
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