Y axis unit – Agilent Technologies Signal Analyzer N9030a User Manual
Page 533
6 RLC Swept SA Measurement Front-Panel & SCPI Reference
AMPTD Y Scale
Y Axis Unit
Displays the menu keys that enable you to change the vertical (Y) axis amplitude unit. The
analyzer retains the entered Y Axis Unit separately for both Log and Lin amplitude scale types.
For example, if Scale Type has been set to Log, and you set Y Axis Unit to dBm, pressing Scale
Type (Log) sets the Y Axis Unit to dBm. If Scale Type has been set to Lin and you set Y Axis Unit
to V, pressing Scale Type (Lin) sets the Y Axis Unit to V. Pressing Scale Type (Log) again sets the
Y axis unit back to dBm.
The units of current (A, dBmA, dBuA) are calculated based on 50 ohms input impedance.
All four of the EMI units (dBµA/m, dBµV/m, dBG, dBpT) are treated by the instrument exactly as though
they were dBuV. The user must load an appropriate correction factor using Amplitude Corrections for
accurate and meaningful results.
If a SCPI command is sent to the analyzer that uses one of the EMI units as a terminator, the analyzer
treats it as though DBUV had been sent as the terminator.
Key Path
AMPTD Y Scale
Mode
SA
Scope
Meas Global
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?
Notes
The Y axis unit has either logarithmic or linear characteristics. The set of units that is
logarithmic consists of dBm, dBmV, dBmA, dBµV, dBµA, dBµV/m, dBµA/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.
Notes
The settings of Y Axis Unit and Scale Type, affect how the data is read over the remote interface.
When using the remote interface no unit is returned, so you must know what the Y axis unit is
to interpret the results:
Example 1, set the following:
Scale Type (Log)
Y Axis Unit, dBm
Scale/Div, 1 dB
Ref Level, 10 dBm
This sets the top line to 10 dBm with each vertical division representing 1 dB. Thus, if a point on
Remote Language Compatibility Measurement Application Reference
533