User manual

Query :REFerence?
Description This command is used to specify the dB reference level. When DB units
is selected (:VOLTage[:DC]:DB), DCV 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 DCV measurement ranges.
:DBM:IMPedance <n>
:UNIT:VOLTage[:DC]:DBM:IMPedance <n> Specify dB reference
Parameters <n> = 1 to 9999 Specify reference impedance
Query :IMPedance?
Description This command is used to specify the dBm reference impedance level.
When dBm units is selected, DCV dBm measurements are made using
the specified dBm reference impedance.
The reference impedance is specified in ohms and is not range depen-
dent. For example, a dBm reference level of 600 is 600 on all DCV mea-
surement ranges. A rational number is rounded to the nearest valid
integer value.
2000-900 (J - Aug 2010) BOOK.fm Page 76 Wednesday, October 12, 2011 12:29 PM