VXI VT1422A - Manual (Page 269)

VT1422A Command Reference 267 Chapter 7
CALibration
CALibration:REMote:DATA?
CALibration:REMote:DATA? extracts the remote calibration constants generated
using the CAL:REMote? command.
Comments •
CAL:REM:DATA returns a definite length block of 1,024 float32 values that
represent a gain and offset pair for each of 512 possible remote channels.
The block is always 1,024, float64 values (8192 bytes) regardless how many
RSCUs are actually connected to the VT1422A. Values for channel positions
where RSCUs are not installed are set to 0.000.
•
Returned Value: the 1,024 float64 values form 512 channel calibration pairs.
A pair of calibration constants consists of first a channel offset value, then a
channel gain value.
•
*RST Condition: Stored calibration constants are unchanged
•
Send with VXIplug&play Function: hpe1422_cmdReal64Arr_Q(...)
CALibration:REMote:STORe
CALibration:REMote:STORe (@<ch_list>) copies the calibration constants held in
working RAM since remote calibration into the RSCU’s non-volatile flash memory.
Only a single channel per RSCU unit need be specified in <ch_list> and all cal
constants for that RSC Unit will be stored. <ch_list> can contain multiple channels
that specify multiple RSC Units.
Parameters
Comments •
Individual channels in <ch_list> must be for RSCUs. If ch_list specifies a
channel not connected through a VT1539A SCP, a 3007 "Invalid signal
conditioning plug-on" error is generated.
Note
An RSCU's Flash Memory has a finite lifetime of approximately 10,000 write cycles
(unlimited read cycles). While executing CAL:REM:STOR once every day would
not exceed the lifetime of the Flash Memory for approximately 27 years, an
application that stored constants many times each day would unnecessarily shorten
the Flash Memory's lifetime. See Comments below.
•
After remote calibration, an RSCUs calibration constants are in live (volatile)
memory and are available for operation. If the RSCUs are to be calibrated often,
especially after a line power failure, they need not be stored in Flash memory.
•
Send with VXIplug&play Function: hpe1422_cmd_Q(...)
Parameter
Name
Parameter
Type
Range of
Values
Default
Units
ch_list channel list (string) 10000 - 15731 none