VXi VT1529A/B 사용자 설명서

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<ref_ohms> must be within 5% of the 7500

Ω nominal reference resistor value 

or a -222 ’Data out of range’ error will be generated. If this error occurs, 
verify the external measurement equipment and run *TST? on the VT1422A.

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<ref_ohms> may be specified in kOhm (kohm).

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When Accepted: Not while INITiated

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Related Commands: CAL:CONF:RES, CAL:STORE ADC

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Send with VXIplug&play Function: hpe1422_cmd(...)

CAL:CONF:RES

(now measure ref resistor with external DMM)

CAL:VAL:RES  <measured value>

sends the value of the just-measured dc 

reference source to the module for A/D calibration.

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The "expected" output values for the voltage reference source is:

0.9 * Nominal Range Value for the 0.0625 through 4 volt ranges.
10 volts for the 16 volt range.

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Use the CAL:CONF:VOLT command to configure the on-board voltage source 

for measurement by an external reference voltmeter via the Calibration Bus 
terminals.

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 A measurement of the source voltage can be made with an external multimeter 

connected to the HCAL and LCAL terminals on the Terminal Module or the 
V H and  V L terminals on the Cal Bus connector when not using a terminal 
module.

•

The <ref_volts> value given must be for the currently configured range and 

output (zero or full scale) as set by the previous CAL:CONF:VOLT <range>, 
ZERO | FSCale command.

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<ref_volts> must be within 4% of the actual reference voltage value as read after 

CAL:CONF:VOLT or an error 3042 ’0x400: DSP-DAC adjustment went to 
limit’ will be generated. If the reading on the external reference voltmeter is in 
excess of 4% error from nominal voltage, verify the voltmeter and execute 
*TST? on the VT1422A.

numeric (float32)

must be within +10% or -50% of the 

"expected" source output value

volts