Remote Interface Reference 4
Keysight 34420A User’s Guide 215
Alternate Programming Language Compatibility
You can configure the 34420A to accept and execute the commands of the the
Keithley 181 meter. Remote operation will only allow you to access the
functionality of the meter language selected. You can take advantage of the full
functionality of the 34420A only through the SCPI programming language. For
more information on selecting the alternate languages from the front panel menu,
see To Select the Programming Language on the previous page.
All of the commands available for the Keithley 181 are implemented in the
34420A, with the exception of the self-test and calibration commands. You must
always calibrate the 34420A using the SCPI language setting.
You can use L2X to switch to the Keithley 181 language. L1X switches back to the
SCPI language. Note that once the Keithley 181 language has been selected you
must append the Keithley "end of message" terminator (X) to any commands.
Be aware that measurement timing may be different in the alternate language
compatibility modes.
Specific Issues
You should be aware of the following differences when using the Keithley 181
language:
– Unlike the Keithley 181, the status byte is not cleared when read unless the
SRQ bit was set.
– A significant software delay exists between the time a syntax error is generated
and the error is reported in the status byte.
– The meter will always use the next highest range than the one requested in a
Keithley command. For example, if you specify the Keithley 2 mV range, the
meter will use the 10 mV range.
– The digital filter, set to SLOW or MEDium, is used to emulate the Keithley
input filter.
– The meter is always set to 2 NPLC.
– The 34420A has a maximum input range of 100 V. Be sure the test setup does
not require a 1000 V range.
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