Keithley 2002, User Manual

Page: 279 / 366

IEEE-488 Reference
3-156
:DIRection? Query Source Bypass state
When a source bypass is enabled and the External or Trigger Link control source is selected,
operation loops around the appropriate control source on the initial pass through that layer. Note
that the source bypass for the scan and measure layers also loops around the delay.
If programmed for another pass through the specified layer (count >1), the bypass loop is not in
effect even though it is still enabled. The bypass loop will be in effect if operation first goes back
into the previous layer (or idle).
Enabling the Source Bypass for the arm and scan layers also enables their output triggers. When
operation leaves the arm or scan layer, the appropriate output trigger pulse occurs. If the Trigger
Link (TLINk) control source is selected, the output trigger is available on the programmed Trig-
ger Link output line. For all other control source selections, the output trigger pulse is available
at the METER COMPLETE Output connector. The output trigger in these two layers is disabled
when the source bypass is disabled.
The output trigger in the measure layer is always enabled and occurs after the device action.
With ACCeptor selected, the bypass is disabled, This simply means that operation will not pro-
ceed through the specified layer until the appropriate event occurs.
PRINT #1, "output 16; :trig:tcon:dir sour; dir?" ' Enable measure source
bypass
PRINT #1, "enter 16" ' Get response from 2002
:ASYNchronous commands
:ILINe <NRf>
:ARM[:SEQuence[1]][:LAYer[1]]:TCONfigure:ASYNchronous:ILINe <NRf> Select input trigger line; arm
layer
:ARM[:SEQuence[1]]:LAYer2:TCONfigure:ASYNchronous:ILINe <NRf> Select input trigger line; scan
layer
:TRIGger[:SEQuence[1]]:TCONfigure:ASYNchronous:ILINe <NRf> Select input trigger line; mea-
sure layer
<NRf> = 1 Line #1 <NRf> = 4 Line #4
2 Line #2 5 Line #5
3 Line #3 6 Line #6
:ILINe? Query programmed input line #
These commands are used to select an input line for the asynchronous Trigger Link of the spec-
ified layer. Keep in mind that asynchronous Trigger Link input and output (see :OLINe) cannot
share the same line. If you assign the input to a line that is already being used for the output, an
error occurs and the command is ignored.
PRINT #1, "output 16; :trig:tcon:asyn:ilin 3; inlin?" ' Select input line
PRINT #1, "enter 16" ' Get response from 2002
Query
Description
Program fragment
Parameters
Query
Description
Program fragment