R&S ESU Series - Page 404

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Operating Manual 1302.6163.12 - 03 4.373

R&S ESU Instrument Functions

User Port

Fig. 4.38 Test with single trigger pulse

A particularly difficult aspect of this problem is the variable settling times, which are

unavoidable in practice. If there is no signal to indicate that the R&S ESU is ready to

collect measured data, the maximum settling time will have to be allowed for until

the trigger signal is sent, thus ensuring reliable measurements. This results in con-

siderable – and in many cases unacceptable – time overhead, depending on the

instrument settings.

To minimize this overhead, the port supplies a signal that indicates the R&S ESU's

readiness to collect measured data. The signal is reset on detection of the next trig-

ger signal. In this way, a handshake is established between the R&S ESU and the

DUT and between the R&S ESU and the controller, which ensures reliable measure-

ments and reduces the time overhead to the settling time actually needed by the

R&S ESU:

Fig. 4.39 Test with ready-for-trigger signal

DUT Output Signal

Analyzer Setup

Analyzer Settling Time

Start

Measurement

Data Acquisition

valid Trigger

Signal

Analyzer not ready for trigger