5-58 Delta, Pulse Delta, and Differential Conductance Model 6220/6221 Reference Manual
Return to Section 5 topics
The following error aborts the arming process:
• Error +416 Step size too small
Armed message
The following message is displayed briefly when Differential Conductance is
armed and ready to run:
DIFF COND ARMED
Press TRIG to start
Aborting Differential Conductance
After Differential Conductance is armed (or running), it can be aborted by pressing
the EXIT key or sending the SOUR:SWE:ABOR command.
Triggering sequence
The Trigger Link is used to synchronize source-measure triggering operations of
the Models 622x and 2182/2182A. See “System connections,” on page 5-6 for
details on Trigger Link connections.
The triggering sequence for the first Differential Conductance cycle is shown in
Figure 5-15 and is explained as follows:
• Model 622x – When Differential Conductance is started from the Model
622x, it outputs the first stepped delta current level. After the Differential
Conductance Delay expires, an output trigger pulse is sent to the Model
2182/2182A to start its operations.
• Model 2182/2182A – After its Trigger Delay expires, the Model 2182/2182A
performs a measurement conversion (A/D Rdg #1). An output trigger pulse
is then sent back to the Model 622x.
• Model 622x – The Model 622x outputs the next stepped delta current level.
After the Differential Conductance Delay expires, an output trigger is sent
back to the Model 2182/2182A. The Differential Conductance Delay is used
to allow the current source to settle after a level change.
• Model 2182/2182A – After its Trigger Delay expires, the Model 2182/2182A
performs another measurement conversion (A/D Rdg #2). An output trigger
pulse is then sent back to the Model 622x.
• Model 622x – The Model 622x outputs the third stepped delta current level.
After the Differential Conductance Delay expires, an output trigger is sent
back to the Model 2182/2182A.
NOTE Table 5-2 explains these coded error and status messages.
This table also provides remedies for the errors.
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