User manual

IEEE-488 Reference

3-160

This command is used to specify the dB reference level. When DB units is selected (:VOLT-

age: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.

PRINT #1, "output 16; :unit:volt:ac:db:ref 2; ref?" ' Set dB reference

PRINT #1, "enter 16" ' Get response message

from 2002

:DBM:IMPedance <n>

:UNIT:VOLTage:AC:DBM:IMPedance <n> Specify dB reference

<n> = 1 to 9999 Specify reference impedance

:IMPedance?

:IMPedance? DEFault

:IMPedance? MINimum

:IMPedance? MAXimum

This command is used to specify the dBm reference impedance level. When dBm units is select-

ed 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 600Ω on all ACV measurement ranges. A rational number is rounded

to the nearest valid integer value.

PRINT #1, "output 16; :unit:volt:ac:dbm:imp 600; imp?" ' Select dBm impedance

PRINT #1, "enter 16" ' Get response message

from 2002

Description

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Parameters

Query

Description

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