R&S SMJ100A, Operating Manual

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Getting Started
R&S
®
SMJ100A
76 Operating Manual 1403.7458.32 ─ 14
3.3.1 Description of Individual Diagram Blocks of the Baseband Section
Each function block can be activated or deactivated with the "ON" check box (on/off
toggling).
The ON/OFF TOGGLE key at the front panel (see
"TOGGLE" on page 23) switches
the currently selected block on or off.
A detailed description of the blocks is provided below.
Baseband A block
In this block, the (first) baseband source is configured and activated. The block is dis-
played only if a baseband generator is available in the instrument.
Depending on the installed software options, various digital standards, user-configured
digital real time modulation or the built-in waveform generator (ARB) can be selected.
The selected modulation is displayed in the block.
AWGN/IMP A block
This block is displayed only if a baseband main module is installed.
In this block (digital) I/Q impairments for the baseband path can be set. With the aid of
the software for AWGN generation (option R&S
SMJ-K62), an (additive) noise signal
can be produced.
AWGN and impairments can be activated independently of each other in the appropri-
ate menus. The settings are displayed in the block. The entire block can be activated
or deactivated. If the block is deactivated, the signal passes through the block
unchanged.
In addition, the differential I/Q output is configured in this block (option R&S SMJ-B16).
Graphics block
With this block, the baseband signal can be graphically displayed in real time. The
block is displayed only if a baseband main module is installed.
BERT block
In this block an integrated bit and block error rate tester can be set. The bit error tester
makes it possible to evaluate a signal demodulated and decoded by a DUT by measur-
ing the bit error rate. The data used to drive the DUT can be generated by the
R&S
SMJ or an user-defined external source. In addition, the block error rate measure-
ment can be used to verify CRC checksums.
3.4 RF Section
An RF path is configured by installing a frequency option that comprises all required
modules.
RF Section