Keysight x-series User Reference Manual page 386

8 Frequency Scan Measurement
AMPTD Y Scale
Notes
Dependencies
Couplings
Preset
State Saved
Readback line
Initial S/W Revision
Modified at S/W Revision
dBm
Sets the amplitude unit for the selected amplitude scale (log/lin) to dBm.
Key Path
Example
Dependencies
Readback
Initial S/W Revision
Modified at S/W Revision
386
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
trace 1 is on the fifth graticule line from the top, it represents 5 dBm and will read out remotely as 5.
Example 2, set the following:
Scale Type (Lin)
Y Axis Unit, Volts
Ref Level, 100 mV (10 mV/div)
This sets the top line to 100 mV and the bottom line to 0 V, so each vertical division represents 10
mV. Thus, if a point on trace 1 is on the fifth graticule line from the top, it represents 50 mV and will
read out remotely as 50.
If an amplitude correction with an Antenna Unit other than None is applied and enabled, then that
antenna unit is forced and the key with that unit is the only Y Axis Unit available. All other Y Axis Unit
keys are grayed out.
If an amplitude correction with an Antenna Unit other than None is applied and enabled, and you then
turn off that correction or set Apply Corrections to No, the Y Axis Unit that existed before the Antenna
Unit was applied is restored.
The analyzer retains the entered Y Axis Unit separately for both Log and Lin amplitude scale types
dBm for log scale, V for linear. The true 'preset' value is dBm, since at preset the Y Scale type is set to
logarithmic.
Saved in instrument state
1-of-N selection
Prior to A.02.00
A.02.00, A.04.00, A.11.00
AMPTD Y Scale, Y Axis Unit
UNIT:POW DBM
Grayed out if an Amplitude Correction with an Antenna Unit is ON.
dBm
Prior to A.02.00
A.02.00
EMI Receiver Mode Reference