Model 6220/6221 User’s Manual Delta, Pulse Delta, and Differential Conductance 5-31
Return to Section 5 topics
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:
4. Set measurement units – Volts are the default units for the Model 6221
but can instead be expressed (and displayed) as an Ohms, Watts, or Sie-
mens reading (see “Measurement units” on page 5-11 for details). The
commands to set measurement units are listed in Table 5-1. The following
example shows the command sequence to select average power measure-
ment units:
5. Set up, arm, and run Pulse Delta – Details on the commands to set up
and arm Pulse Delta are provided in Table 5-3. The following example dem-
onstrates the proper sequence to set up, arm, and run a Fixed output:
A. Trace points specifies the size of the buffer. Buffer size should be the
same value as Pulse Delta count. See Section 6 for details on all buffer
commands.
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.
UNIT W ‘ Select power (Watts) measurement units.
UNIT:POWer AVERage ‘ Select Average power type.
*RST ‘ Restores 6221 defaults.
SOUR:PDEL:HIGH 10e-3 ‘ Sets pulse high value to 10mA.
SOUR:PDEL:LOW 0 ‘ Sets pulse low value to 0mA.
SOUR:PDEL:WIDT 500e-6 ‘
Sets pulse width to 500µs.
SOUR:PDEL:SDEL 100e-6 ‘
Sets source delay to 100µs.
SOUR:PDEL:COUN 200 ‘
Sets pulse count to 200.
SOUR:PDEL:RANG BEST ‘
Selects the best source range.
SOUR:PDEL:INT 10 ‘
Sets pulse interval to 10 PLC.
SOUR:PDEL:SWE OFF ‘
Disables sweep function.
SOUR:PDEL:LME 2 ‘
Set for two low pulse measurements.
TRAC:POIN 200 ‘
Sets buffer to 200 points.
A
SOUR:PDEL:ARM ‘ Arms Pulse Delta.
INIT:IMM ‘ Starts Pulse Delta measurements.
B
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