3 Spectrum Analyzer Mode
3.11 Harmonics Measurement
Example
:DISP:HARM:VIEW:WIND:TRAC:Y:PDIV 5
Preset 10.00 dB / Div
State Saved Saved in instrument state
Min 0.10 dB
Max 20 dB
Annotation <value> dB/ left upper of graph ! all measurements unless noted
Y Axis Unit
Displays a dropdown menu that enables you to change the vertical (Y) axis
amplitude unit. This setting affects how the data is read over the remote interface.
When using the remote interface, only numerical values are returned, so you must
know what the Y Axis Unit is to interpret the results. This is described in more detail
in "Amplitude Data Query and Y Axis Unit" on page 1856 below.
For measurements that support both Log and Lin scales, the instrument retains the
entered Y Axis Unit separately for both Log and Lin amplitude Display Scales. For
example, if Display Scale has been set to Log, and you set Y Axis Unit to dBm,
pressing Display Scale (Log) sets the Y Axis Unit to dBm. If Display Scale has been
set to Lin and you set Y Axis Unit to V, pressing Display Scale (Lin) sets the Y Axis
Unit to V. Pressing Display Scale (Log) again sets the Y Axis Unit back to dBm.
If an Amplitude Correction is being applied that has an associated Transducer Unit,
all selections but Xducer Unit are grayed-out. For more information, see
"Transducer Unit" on page 1856 below.
Remote Command
:UNIT:POWer DBM | DBMV | DBMA | V | W | A | DBUV | DBUA | DBPW | DBUVM |
DBUAM | DBPT | DBG
:UNIT:POWer?
Example
:UNIT:POW dBmV
:UNIT:POW?
See also "Remote Interface Examples" on page 1854 below
Notes The Y axis unit has either logarithmic or linear characteristics. The set of units that is logarithmic
consists of dBm, dBmV, dBmA, dBmV, dBmA, dBmV/m, dBmA/m, dBpT, and dBG. The set of units
that are linear consists of V, W, and A. The chosen unit will determine how the reference level and all
the amplitude-related outputs like trace data, marker data, etc., read out
Dependencies Appears only in Spectrum Analyzer Mode
If an amplitude correction with a Transducer Unit other than None is applied and enabled:
–
The Transducer Unit selection is forced, and is the only Y Axis Unit available. The specific
Transducer Unit is shown in square brackets in the dropdown, and all other Y Axis Unit choices
are grayed-out
–
If you turn off that correction or set Apply Corrections to NO, the Y Axis Unit that existed before
Spectrum Analyzer Mode User's &Programmer's Reference 1853
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