Keysight U2600A Serie Guia Del Usuario página 54

3 Features and Functions
Table 3-1 Step-by-step descriptions for trigger function flowchart
Steps Descriptions
Step 1 By default, no trigger souce is selected (TRIG:SOUR NONE). Hence, all digital inputs and digital outputs will
operate immediately.
Step 2 Users may configure the desired output values before a trigger occurred. For example:
-> SOUR:DIG:DATA:BYTE 123,(@201:204)
And read the input values, for example:
-> SENS:DIG:DATA:BYTE? (@101:104)
<- 111,111,111,111
Step 3 Select one of the trigger source. (TRIG:SOUR 301|302|STRG)
The star trigger "STRG" trigger source can only be used when the DIO module is installed in a modular
instrument U2700A chassis.
Step 4 All IO operation will freeze when the user select one of the trigger source. So, if the user supply 98 to the input,
sending the query command "SENS:DIG:DATA:BYTE? (@101:104)" will return "111,111,111,111"
even the supply value at the DIO module has changed to 98 (for this case).
At this stage, users are allow to configure the output values. For example:
-> SOUR:DIG:DATA:BYTE 220, (@201:204)
-> SOUR:DIG:DATA:BYTE? (@201:204)
<- 220,220,220,220
Even though the query command returns "220,220,220,220", the real output value at the hardware DIO
module will remain the same as previous stage (Step 2), which is 123 in this case. The output value will remain at
123 until the DIO module receives the trigger signal.
Step 5 Users may stop trigger operation at this stage by sending the command "TRIG:SOUR NONE". If this command
is sent without receiving any trigger signal, then the query of this command "SOUR:DIG:DATA:BYTE?
(@201:204)" should give back the previous stage (Step 2) value, which is 123 in this example but not 220.
Step 6 Send the command "TRIG:MON ON" to start monitoring the trigger signal. Users are NOT allowed to change the
output setting at this stage.
54 Keysight U2600A Series User's Guide