R&S ESU Series Operating Manual page 166

R&S ESU
This low average value is usually corrected in noise power measurements by a 2.5
dB factor. Therefore the R&S ESU 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 irrespec-
tive of the signal characteristic.
Following selections are available:
LOG
LIN
POWER
For correct power averaging with units VOLT or AMPERE, selection POWER has
to be used.
ASCII FILE The ASCII FILE EXPORT softkey stores the active trace in ASCII format, e.g. on a
EXPORT memory stick.
Remote command:
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:
The data section starts with the key word " 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, e.g. MS-Excel. It
is necessary to define ';' as a separator.
Different language versions of evaluation programs may require a different han-
dling of the decimal point. It is therefore possible to select between separators '.'
(decimal point) and ',' (comma) using the DECIM SEP softkey.
Operating Manual 1302.6163.12 - 03
logarithmic averaging
linear averaging (delogarithmization depends on
selected unit).
For units VOLT and AMPERE the level values are con-
verted into linear voltages prior to averaging.
linear averaging (delogarithmization to power for all
units)
parameter name; numeric value; base unit
FORM ASC;
MMEM:STOR:TRAC 1,'TRACE.DAT'
Instrument Functions
Analyzer Mode
4.135