Instrument Function
R&S
®
SMU200A
175Operating Manual 1007.9845.32 ─ 15
The "BERT" interface is located on the rear panel. Besides the data and clock input, it
provides further inputs for masking data containing the PRBS sequence. The interface
description can be found in chapter 1.3, "BERT Connector", on page 839.
5.4.1 Test setup
The following figure shows the test setup for the bit/block error rate measurement. The
data used to drive the DUT can be generated by the R&S Signal Generator or an user-
defined external source. The R&S Signal Generator can generate any externally com-
puted modulation signals that were created using e.g. R&S WinIQSIM2 software (see
chapter 5.8.4.1, "ARB User Interface", on page 380).
A known PRBS sequence must be used for the bit error rate measurement.
Fig. 5-1: Test setup for bit or block error rate measurement.
The DUT is driven using a known data sequence. It demodulates the data and sends it
together with a clock signal to the R&S Signal Generator. The Data Enable signal marks
the user data of the signal. The restart signal for restarting the PRBS calculation is only
important for the bit error rate measurement.
Bit and Block Error Rate Measurements - BERT Block
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