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IEEE-488 Reference

4-229

Line 10 Selects semi-synchronous Trigger Link protocol, and then queries the selected pro-

tocol.

Line 20 Addresses the Model 2001 to talk.

Line 30 Displays the Trigger Link protocol (SSYN).

:DIRection <name>

:ARM[:SEQuence[1]][:LAYer[1]]:TCONﬁgure:DIRection <name> Control arm Source Bypass

:ARM[:SEQuence[1]]:LAYer2:TCONﬁgure:DIRection <name> Control scan Source Bypass

:TRIGger[:SEQuence[1]]:TCONﬁgure:DIRection <name> Control measure Source By-

pass

Parameters <name> = SOURce Enable Source Bypass

= ACCeptor Disable Source Bypass

Formats :arm:tcon:dir <name>

:arm:lay2:tcon:dir <name>

:trig:tcon:dir <name>

Defaults Power-up Saved power-on setup

*RST ACCeptor (all layers)

:SYSTem:PRESet ACCeptor (all layers)

Query :DIRection? Query Source Bypass state

Short-form formats: :arm:tcon:dir?

:arm:lay2:tcon:dir?

:trig:tcon:dir?

Response message: SOUR or ACC

Description When a Source Bypass is enabled and the External or Trigger Link arm control source is select-

ed, operation will loop around the appropriate control source on the initial pass through that lay-

er. 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 will not

be in effect even though it will still be 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 will occur. If

the Trigger Link (TLINk) control source is selected, the output trigger will be available on the

programmed Trigger Link output line. For all other control source selections, the output trigger

pulse will be 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.

Keithley 2001 User Manual

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