Rohde & Schwarz R&S UPP, Руководство пользователя

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Instrument Functions
R&S
®
UPP
255 User Manual 1411.1055.32 ─ 10
5.6.8 Arbitrary
The generator generates a freely definable curve shape which is read out from a file as
a sequence of samples. The maximum length is 262144 (256 k) samples. When out-
put, the curve is repeated continuously in an unbroken sequence. If a measurement is
restarted (Start button), the curve starts again from the beginning of the file. The indi-
vidual samples are output at the sampling rate selected in the generator.
Function
Selects the arbitrary signal.
Remote command:
SOURce:FUNCtion
on page 697
ARBitrary
File
File from which the curve shape is read.
The button opens a browser that you can use to select the file.
File format:
ASCII file with max. 524288 (512 k) samples. The individual samples are entered as a
sequence of numbers (value range ‒1.0 to +1.0). The file must contain one line with
the keyword "TIMETAB_FILE" before the number sequence. Comment lines must
begin with '#' and can be used anywhere in the file. No distinction is made between
uppercase and lowercase characters. The recommended and preset file extension is
'.ARB'. However, due to the keyword "TIMETAB_FILE" which must always be entered,
it is also possible to use any other file extension.
The numerically highest value (Maximum) is output with the peak voltage set in the
"Volt Peak" entry field; the other samples are level-controlled according to their ratio to
the maximum. Since the ratio of peak value to RMS value is calculated internally from
the samples, it is also possible to enter the RMS value.
Example: rs_exam.arb in the
D:\UPV\User
directory
Remote command:
MMEMory:LOAD:ARBitrary
on page 708
Generator Signals