Keithley 2002, User Manual

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IEEE-488 Reference
3-159
3.24 :UNIT subsystem
The UNIT subsystem is used to configure and control the measurement units for TEMP and
ACV, and is summarized in Table 3-16.
:TEMPerature <name>
:UNIT:TEMPerature <name> Specify TEMP units
<name> = C or CEL °C temperature units
F or FAR °F temperature units
K K temperature units
TEMPerature? Query temperature units
This command is used to specify the units for temperature measurements.
PRINT #1, "output 16; :unit:temp f; temp?" ' Select °F for TEMP
PRINT #1, "enter 16" ' Get response message from 2002
:AC <name>
:UNIT:VOLTage:AC <name> Specify ACV units
<name> = V AC voltage measurement units
DB dB AC voltage measurement units
DBM dBm AC voltage measurement units
:AC? Query AC voltage units
This command is used to select the units for ACV measurements. With volt (V) units selected,
normal AC voltage measurements are made for the ACV function. With DB units selected, AC
dB voltage measurements are performed. The DBM units selection is used to make decibel mea-
surements referenced to 1mW. dB and dBm measurements are explained in paragraph 2.4.1
(UNITS).
PRINT #1, "output 16; :unit:volt:ac db; ac?" ' Select dB units for ACV
PRINT #1, "enter 16" ' Get response message from 2002
:DB:REFerence <n>
:UNIT:VOLTage:AC:DB:REFerence <n> Specify dBm reference
<n> = 0.001 to 750 Specify reference in volts
DEFault 1V reference
MINimum 0.001V reference
MAXimum 750V reference
:REFerence?
:REFerence? DEFault
:REFerence? MINimum
:REFerence? MAXimum
Parameters
Query
Description
Program fragment
Query
Description
Program fragment
Parameters
Query