Keysight Truevolt Serie Mode D'emploi page 88

Step 5: Press Trigger Settings to view or change the trigger source. By default, the trigger source is set to
auto. You can also select external and level triggering when digitizing.
Press Trg Source and select one of three trigger sources:
Auto - the instrument automatically triggers immediately after you press [Run/Stop] or [Single].
Step 5a Configure external triggering: After pressing Ext, this menu appears:
Ext - the instrument triggers when an edge of the appropriate slope arrives at the rear-panel Ext Trig con-
nector. You can specify the slope on the softkey menu that appears when Trg Src is set to Ext. To select
external triggering, press Ext, and select either Pos or Neg slope:
Step 5b Select level trigger: Level - (34465A/70A with DIG option only) the instrument issues one trigger
when the specified measurement threshold with the specified positive or negative slope occurs. To select
level triggering, press Level and specify the level threshold and Pos or Neg slope:
Select the expected measurement range using the [Range] [+] and [-] keys before setting the
level trigger voltage or current.
Step 6: Specify delay time
Specify the delay that occurs prior to digitizing. This delay is inserted once, after the trigger event occurs,
and before digitizing begins. This can be automatic (the instrument chooses the delay based on the instru-
ment's settling time) or manual (you specify the delay time).
Step 7: (Optional) Specify pretrigger count.
When an External or Level Trigger Source is used, you can specify a pretrigger count. After specifying a
pretrigger count, readings are taken and held in a buffer while waiting for the trigger event to occur.
When the trigger event occurs, the buffered readings are transferred to reading memory and the remain-
ing readings are recorded as usual. If the trigger event occurs before Pretrigger Count readings have been
taken, the trigger event will still take effect and digitizing will complete without having taken all of the pre-
trigger readings. The Pretrigger Count is limited to one less than the total number of readings specified to
be taken by the Duration setting.
Keysight Truevolt Series Operating and Service Guide
Features and Functions
89