Keysight x-series User Manual

3 Spectrum Analyzer Mode
3.11 Harmonics Measurement
Amplitude Data Query and Y Axis Unit
The settings of Y-Axis Unit and Display Scale affect how the data is returned over
the remote interface in response to a query. 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:
–
Display Scale (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:
–
Display Scale (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.
NOTE
The units of current (A, dBmA, dBuA) are calculated based on 50 Ω input
impedance.
Transducer Unit
Transducer Units (formerly called Antenna Units) are units of field strength rather
than amplitude, and are used when correcting the response of device such as
antennas whose amplitude characteristics are measured in units of field strength. All
five of the Transducer Units (dBmA/m, dBmV/m, dBG, dBpT, dBmA) are treated by
the instrument exactly as though they were dBmV, when uncorrected. You must
load an appropriate correction factor using Input/Output, Corrections for accurate
and meaningful results.
1856 Spectrum Analyzer Mode User's &Programmer's Reference

Keysight x-series Specifications

General

Analysis Bandwidth	Up to 1 GHz (depending on model)
Real-Time Bandwidth	Up to 1 GHz (depending on model)
Form Factor	Benchtop
Connectivity	LAN, USB, GPIB
Resolution Bandwidth	1 Hz to 10 MHz (depending on model)