R&S FSMR, Operating Manual

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R&S FSMR Analyzer - Traces
1166.3363.12 4.11-5 E-2
2.5 dB
Amplitude
Probability distribution
Amplitude distribution
(after averaging)
Amplitude distribution
(without averaging)
This low average value is usually corrected in noise power measurements by a
2.5 dB factor.
Therefore the
R&S FSMR
offers the selection of
linear
averaging. The trace data are delogarithmized prior to averaging, then
averaged and logarithmized again for display on the screen. The average
value is always correctly displayed irrespective of the signal characteristic.
Following selections are available:
LOG:
logarithmic averaging
LIN linear averaging (delogarithmization depends on selected unit)
For units VOLT and AMPERE the level values are converted into
linear voltages prior to averaging.
POWER linear averaging (delogarithmization to power for all units)
For correct power averaging with units VOLT or AMPERE, selection POWER has to
be used.
ASCII FILE
EXPORT
The ASCII FILE EXPORT softkey stores the active trace in ASCII format on a
floppy disk.
IEC/IEEE command
FORM ASC;
MMEM:STOR:TRAC 1,'TRACE.DAT'
The file consists of the header containing important scaling parameters and a
data section containing the trace data.
The data of the file header consist of three columns, each separated by a
semicolon:
parameter name; numeric value; basic unit
The data section starts with the keyword " Trace <n> " (<n> = number of
stored trace), followed by the measured data in one or several columns
(depending on measurement) which are also separated by a semicolon.
This format can be read in from spreadsheet calculation programs, eg MS-
Excel. It is necessary to define ';' as a separator.
Different language versions of evaluation programs may require a different handling
of the decimal point. It is therefore possible to select between separators '.' (decimal
point) and ',' (comma) using softkey DECIM SEP.