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340 VT1422A Command Reference Chapter 7
[SENSe]
[SENSe:]FUNCtion:CUSTom
[SENSe:]FUNCtion:CUSTom [<range>,](@<ch_list>) links channels with the
custom Engineering Unit Conversion table loaded with the DIAG:CUST:MXB or
DIAG:CUST:PIECE commands. Contact a VXI Technology System Engineer for
more information on Custom Piecewise Engineering Unit Conversion for specific
applications.
Parameters
Comments • See “Creating and Loading Custom EU Conversion Tables” on page 150.
• The VT1422A has five ranges: 0.0625 V dc, 0.25 V dc, 1 V dc, 4 V dc, and
16 V dc. To select a range, simply specify the range value (for example, 4 selects
the 4 V dc range). If a value is specified that is larger than one of the first four
ranges, the VT1422A selects the next higher range (for example, 4.1 selects the
16 V dc range). Specifying a value larger than 16 causes an error -222 "Data out
of range." Specifying 0 selects the lowest range (0.0625 V dc). Specifying
AUTO selects auto range. The default range (no range parameter specified) is
auto range.
• If using amplifier SCPs, set them first and keep their settings in mind when
specifying a range setting. For instance, if the expected signal voltage is to be
approximately 0.1 V dc and the amplifier SCP for that channel has a gain of 8,
<range> must be set no lower than 1 V dc or an input out-of-range condition
will exist.
• If an A/D reading is greater than the <table_range> specified with
DIAG:CUSTOM:PIEC, an overrange condition will occur.
• If no custom table has been loaded for the channels specified with
SENS:FUNC:CUST, an error will be generated when an INIT command
is given.
• When Accepted: Not while INITiated
• Related Commands: DIAG:CUST:…
• *RST Condition: all custom EU tables erased
• Send with VXIplug&play Function: hpe1422_cmd(...)
Usage DIAG:CUST:MXB slope,offset,(@116:123)
send M*X+B to VT1422A for chs 16-23
SENS:FUNC:CUST 1,(@116:123)
link custom EU with chs 16-23
INITiate then TRIGger module
Parameter
Name
Parameter
Type
Range of
Values
Default
Units
range numeric (float32) see first comment V dc
ch_list channel list (string) 100 - 15731 none