5-46 Delta, Pulse Delta, and Differential Conductance Model 6220/6221 Reference Manual
Return to Section 5 topics
If a finite Pulse Delta count is being used, the Pulse Delta measurements
will stop after the last Pulse Delta measurement is performed. However,
Pulse Delta remains armed and can be run again by pressing the TRIG key.
The new Pulse Delta readings will overwrite the old readings in the buffer.
If the infinite Pulse Delta count is being used, Pulse Delta will run
continuously. If the buffer fills, Pulse Delta readings will stop being stored,
even though Pulse Delta continues to run.
8. When finished, press EXIT to disarm Pulse Delta.
9. On the Model 6221, press RECALL to access the Pulse Delta readings
stored in the buffer.
Operation – PC control
The system configuration for PC control of the Model 6221 is shown in Figure 5-2B
on page 5-5.
1. Connections are shown in the following illustrations. All power must be
removed from all components in the system before making connections:
• Figure 5-4, page 5-8 – System connections
• Figure 5-5, page 5-10 – Test connections
2. Configure communications for the Models 2182A and 6221 as explained in
“Configuring communications,” on page 5-10.
3. On the Model 2182A, select the desired measurement range. For front
panel operation, use the RANGE keys to select the measurement range.
Commands from the PC to control the Model 2182A are addressed to the
Model 622x. Each command is then routed through the Model 622x out the
serial port (RS-232) to the Model 2182A. The following command word is
used for this communication process:
SYSTem:COMMunicate:SERial:SEND <data>
Where: <data> is a valid Model 2182A command.
The following query command is used to return the response to a query
command sent over the serial port:
SYSTem:COMMunicate:SERial:ENTer?
When communicating over the serial port, there are no errors reported if a
Model 2182A is not connected to the serial port.
Examples – The following commands demonstrate proper syntax for
sending commands and returning responses to queries over the serial port:
SYST:COMM:SER:SEND “VOLT:RANG 1”
‘ Select 1V range for 2182A.
SYST:COMM:SER:SEND “VOLT:RANG?” ‘ Send range query.
SYST:COMM:SER:ENT? ‘ Return response to query.
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