R&S SMJ100A, Руководство по эксплуатации, Страница: 197 / 874

Instrument Function
R&S
®
SMJ100A
181 Operating Manual 1403.7458.32 ─ 14
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 A.4, "BERT Connector" , on page 826.
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
SMJ or an user-defined
external source. The R&S SMJ can generate any externally computed modulation sig-
nals that were created using e.g. R&S WinIQSIM2 software (see Chapter 5.8.3.2,
"ARB User Interface" , on page 372).
A known PRBS sequence must be used for the bit error rate measurement.
Figure 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
SMJ. The Data Enable signal marks the user
Bit and Block Error Rate Measurements - BERT Block