IEEE-488 Reference
3-64
:FRESh?
:CALCulate[1]:DATA:FRESh? Recalculate CALC 1
Description This query command is used to return a new (fresh) math result of CALC1. This command will
not request the same result twice. If a new reading is triggered, this command will wait until the
math result is available. When CALC1 is disabled, there is no difference between SENS:DA-
TA:FRES? and CALC:DATA:FRES?.
:IMMediate
:CALCulate[1]:IMMediate Recalculate CALC 1
Query :IMMediate? Perform calculation and read result (equivalent to :CALCulate[1]:IMMedi-
ate; DATA?)
Description When you change the math calculation, the next instrument reading reflects the new calculation
(assuming CALC 1 math is enabled). If the instrument is not in a continuous measurement mode
(i.e. waiting for a trigger), the displayed reading will not update to the reflect the new calculation
until the next reading conversion occurs.
This action command allows you to re-process the current input data to reflect a new calculation.
For example, assume the instrument is in a non-continuous measurement mode and requires a
manual trigger to cause the next reading conversion. Changing the calculation will not affect the
currently displayed reading. However, sending the :IMMediate command re-processes that dis-
played reading to reflect the new calculation. Note that sending the :IMMediate command does
not initiate a reading conversion.
An alternate way to perform the calculation and read the result is by using the query form of the
command (:IMMediate?). When this command is sent, the calculation is performed and the re-
sult is queried.
Program fragment PRINT #1, "output 27; :syst:pres?" ' Select defaults
PRINT #1, "output 27; :trig:sour bus"' ' Place 6517A in one-
' shot measure mode
SLEEP 3 ' Wait three seconds
PRINT #1, "output 27; :calc:form pol"' ' Select polynomial math
' calculation
PRINT #1, "output 27; :calc:kmat:ma0f 50"' ' Set "a0" to 50
PRINT #1, "output 27; :calc:stat on"' ' Enable calculation
SLEEP 3 ' Wait 3 seconds
PRINT #1, "output 27; :cal:imm" ' Perform calculation
' (adds 50 to reading)
To Next Page
Loading...
Need help?
General
