C-6 Working with the Localhost PC Software
C-8 PN: 10580-00444 Rev. U MS2090A UG
C-6 Working with the Localhost
The localhost setting provides a simulated connection to the instrument hardware, but does not provide
simulated data. When an instrument is not connected and the MS2090A software instead connects with the
localhost, most of the menus are available and operate the same as they do on the instrument, but there are
some differences as discussed in the following sections. In order to analyze measurement data, this data must
first be acquired using instrument hardware and then saved locally to the PC or transferred to the PC from
instrument storage at a later time.
Some notes and caveats when connected to the localhost:
• The PC software supports the following modes:
• Spectrum analyzer
• RTSA (trace data only)
• 5GNR Analyzer
• LTE Analyzer
• Pulse Analyzer
• EMF Meter
• IA Spectrum
• IA RTSA
• HIPM
• CAA
• The software must be set to the correct mode to recall a file for that mode. For example, to recall a
.fm5gnr file, the 5G mode from the PC software must be selected first.
• Trace files will be recalled into a "HOLD" state, just like they would be on an instrument. This means
that if the user changes the span, center frequency, or other settings that invalidate the data, all trace
data will be cleared from the screen. The only way to get it back is to recall the trace again.
• Some buttons presented in the interface may not be applicable when connected to the localhost. Selecting
them will have no effect.
• Measurements such as channel power or occupied bandwidth can be performed on recalled trace data,
but the sweep must be set to Continuous. The same is true for evaluating the trace on a limit line.
• Measurements that change the span, such as SEM, are not functional unless the original file was saved
while making an SEM measurement.
Measurement Setup Parameters
When recalling and analyzing measurement data, changing settings that would affect the data acquisition may
cause the recalled data to be removed from the display. For example, you can change amplitude parameters,
but you cannot change frequency parameters such as start/stop, span, and bandwidth parameters since there
would be no data associated with those changed parameters. You can apply measurement features to the saved
measurement data such as markers and limit lines and you can change many measurement and view settings.
Opening a .fmxxxx measurement file when connected to the localhost will work basically the same as recalling
a measurement on an instrument.
Below is a summary of menu behaviors when working with recalled measurement data and when connected to
the localhost. Note that when connected to an instrument, the menus behave the same as on the instrument.
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