Chapter 5 Instructions of Command Sets
22
Measuring Subsystem:
FETCh? [@2]
READ?
Description • Return the primary or secondary function value of output
buffer.
• Retrieves the measurements taken by the INITiate command
and places them into the device's output buffer.
• The query will return data any time that the last reading is
valid.
• The meter produces an Error 230 in the following case, and
no result is returned:
When invalid data is present while awaiting a trigger event
(such as when the range is changed while the Hold function
is enabled).
Parameter If parameter is omitted, the meter returns the primary function
value.
Response Return <NR3> format string.
Example
FETC? @2: Return the value, e.g. +1.23450000E+00
• If query the sub function value and the sub is not set, the meter returns
an error prompt to the host.
• The sub display is enabled by sending
CONF:FREQ or CONF:PULS
command. Original main function changes to sub function, and the main
function is replaced by frequency or pulse function.
Description • Return the primary function value of output buffer after the
next triggered measurement is complete.
• The command provides a method of performing a
FETC?
operation on fresh data.
•
The query command is identical to: ABOR; INIT; FETC?. The
command is like FETCh? on the immediate trigger mode.
Response Return <NR3> format string.