Rohde & Schwarz SMBV100A - Arbitrary Waveform Generator ARB; Introduction

Instrument Function
R&S
®
SMBV100A
379Operating Manual 1176.8016.02 ─ 17
Global Trigger/Clock/Input Settings
Calls the "Global Trigger/Clock/Input Settings" menu. This menu is used among other
things for setting the trigger threshold, the input impedance and the polarity of the clock
and trigger inputs.
The parameters in this menu affect all digital modulations and standards, and are
described in the Chapter 5.2.3.13, "Global Trigger/Clock/External Input Settings",
on page 139.
Remote command:
n.a.
5.9.4 Arbitrary Waveform Generator ARB
The Arbitrary Waveform Generator (ARB) is an I/Q modulation source forming an inte-
gral part of the R&S SMBV. It can be used to output any externally calculated modula-
tion signals or internally generated multi carrier signals or waveform files.
The Arbitrary Waveform Generator is available for instruments equipped with option
Baseband Generator (R&S SMBV-B10) or with any of the ARB only options
(R&S SMBV-B51/K51x). The options feature different ARB memory sizes (see data
sheet). Apart from the memory size, however, these options offer the same functional-
ity, either one can be installed.
5.9.4.1 Introduction
This chapter provides background information on the ARB functionality and the impact
of the provided settings.
For description on the multi carrier, multi segment and multi carrier continuous wave
functions, refer to:
●
Chapter 5.9.4.4, "Multi Carrier Waveforms", on page 423
●
Chapter 5.9.4.3, "Multi Segment Waveforms", on page 407
●
Chapter 5.9.5, "Multi Carrier Continuous Wave", on page 436
Waveform Files Sources
The R&S SMBV can replay any waveform file stored on a network drive but also gen-
erate and replay simple waveforms for test purposes.
A waveform is a file with specified file format containing raw IQ samples. The IQ values
are calculated in advance and stored as waveform files with predefined extension
*.wv. When created by the R&S SMBV, the instrument inserts a tagged waveform
header at the beginning of each created ARB file. For more information, refer to Chap-
ter 7.4, "Waveform and List Format", on page 511.
Depending on whether the R&S SMBV creates the waveform files itself or not, two
waveform files sources can be distinguished:
●
Internally generated waveforms
Baseband Signal - Baseband Block