Voltage Commands - Keithley 2010 User Manual

:VOLTage commands

:AC <name>
:UNIT:VOLTage:AC <name>
Parameters
Query
Description
:DB:REFerence <n>
:UNIT:VOLTage:AC:DB:REFerence <n>
Parameter
Query
Description
:DBM:IMPedance <n>
:UNIT:VOLTage:AC:DBM:IMPedance <n>
Parameter
Query
Description
<name> = V
DB
DBM
: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 measurements
referenced to 1mW. dB and dBm measurements are explained further in
Section 2.
<n> = 1e-7 to 1000 Specify reference in volts
:REFerence?
This command is used to specify the dB reference level. When DB units is
selected (:VOLTage:AC: DB), ACV dB measurements are made using the
specified dB reference level.
The reference level is specified in volts and is not range dependent. For
example, a dB reference level of 1 is 1V on all ACV measurement ranges.
<n> = 1 to 9999 Specify reference impedance
:IMPedance?
This command is used to specify the dBm reference impedance level. When
dBm units is selected, ACV dBm measurements are made using the specified
dBm reference impedance.
The reference impedance is specified in ohms and is not range dependent.
For example, a dBm reference level of 600 is 600 on all ACV measurement
ranges. A rational number is rounded to the nearest valid integer value.
SCPI Command Reference
Specify ACV units
AC voltage measurement units
dB AC voltage measurement units
dBm AC voltage measurement units
Specify dBm reference
Specify dB reference
5-77