R&S AFQ100A, Руководство по эксплуатации

Страница: 112 / 401

R&S AFQ100A Overview of Instrument Functions
1401.3084.32 4.1 E-3
4 Instrument Functions
Overview of Instrument Functions
This chapter explains the functions of the I/Q modulator and the options available in the setting dialogs.
The associated IEC/IEEE bus command is specified for each parameter where applicable.
The largest part of the chapter describes the functions used for the internal generation of the signals:
Loading of waveforms and configuration of trigger, marker an clock signals is performed in the
Baseband block " Baseband Block " on page 4.3.
Impairments of the digital I/Q signal like offsets or phase shifts are defined in the Impairments block
" Impairments Block " on page 4.40.
Shifts in time or frequency like IF-generation in the Time and Frequency Shifts section " Time and
Frequency Shifts " on page 4.38.
The frequency response of external measurement equipment can be taken into account for signal
generation in the
Equalizer block " Equalizer Block " on page 4.45.
Several output types can be selected and configured in the Output block " Output Block " on page 4.57.
The integrated bit error rate tester is configured and activated in the BERT function block in section " Bit
Error Rate Measurements - BERT Block " on page 4.66 .
The general instrument settings do not directly affect signal generation. They include various functions,
such as configuring the modulator and its interfaces in the
Setup menu - e.g. setting the IEC/IEEE bus
address, starting an adjustment, and querying instrument data.
Menu and Status Line
Several menus, displayed in a toolbar offer access to the main instrument functions.
The File menu offers access to functions for loading or saving instrument settings.
The Setup menu covers all the instrument settings which do not directly influence signal generation.
The Edit menu along with its submenus corresponds to the blocks of the main window, the settings
there control the instrument's signal generation. Help calls the R&S AFQ's Online Help.
The main characteristics of the waveform, file name, crest factor and amplitude are permanently
displayed in the header section of the instrument screen. Additionally, if a multi segment waveform is
loaded, the index of the currently generated segment is displayed.
Waveform name, segment and crest factor are indicated only, whereas the amplitude can be edited
directly in the header. Status messages for the instrument state are displayed in the info line besides
the Info button. Additionally the state of remote control is indicated besides the info line. The information
manager is opended by clicking on the
Info button.