User manual

IEEE-488 Reference
2001-900-01 Rev. K / August 2010 4-227
Parameters <n> = 50 50 reference impedance
= 75 75 reference impedance
= 93 93 reference impedance
= 132 132 reference impedance
= 300 300 reference impedance
= 600 600 reference impedance
= DEFault 75 reference impedance
= MINimum 50 reference impedance
= MAXimum 600 reference impedance
Format :unit:volt:ac:dbm:imp <n>
Defaults Power-up Saved power-on setup
*RST 75
:SYSTem:PRESet 75
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 selected 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 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, and the
second queries the reference impedance.
Line 20
Addresses the Model 2001 to talk.
Line 30
Displays the reference impedance (600).