Keithley 2001 User Manual

IEEE-488 Reference
4-236
:DBM:IMPedance <n>
:UNIT:VOLTage:AC:DBM:IMPedance <n> Specify dB reference
Parameters
<n> = 50 50 Ω reference impedance
= 75 75 Ω reference impedance
= 93 93 Ω reference impedance
= 132 132 Ω reference impedance
= 300 300 Ω reference impedance
= 600 600 Ω reference impedance
= DEFault 75 Ω reference impedance
= MINimum 50 Ω reference impedance
= MAXimum 600 Ω reference impedance
Format :unit:volt:ac:dbm:imp <n>
Defaults
Power-up Saved power-on setup
*RST 75 Ω
:SYSTem:PRESet 75 Ω
Query :IMPedance?
:IMPedance? DEFault
:IMPedance? MINimum
:IMPedance? MAXimum
Short-form formats: :unit:volt:ac:dbm:imp?
:unit:volt:ac:dbm:imp? def
:unit:volt:ac:dbm:imp? min
:unit:volt:ac:dbm:imp? max
Response message: 50 to 600 (ohms)
Description
This command is used to specify the dBm reference impedance level. When dBm units is select-
ed ACV dBm measurements will be 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 Ω on all ACV measurement ranges. Specifying a value that is not
listed above will be rounded to the nearest valid value.
Programming example 10 OUTPUT 716; “:unit:volt:ac:dbm:imp 600; imp?”
20 ENTER 716; A$
30 PRINT A$
40 END
Line 10 Two commands in this program message; the first sets the dBm reference impedance
to 600 Ω , and the second queries the reference impedance.
Line 20 Addresses the Model 2001 to talk.
Line 30 Displays the reference impedance (600).

Keithley 2001 Specifications

General

Brand	Keithley
Model	2001
Category	Multimeter
Language	English