AWG G3 PAD FOR PS3 Especificações descarregar pdf (Página 49)

Master Clock System 3 Hardware Components

System Reference, January 2001

Master Clock System

The master clock is the timing reference for all timings,

and the heart of the test system. The tester hardware such

as the digital channel boards and analog modules use the

master clock for operating the hardware.

In the world of mixed signal testing, two different master

clocks are often needed to make use of the best perfor-

mance of arbitrary waveform generators and waveform

digitizers (including the sampler) involved in testing the

device. This is especially important in performing

coherent measurements as shown in the following figure.

Figure24 Coherent Sampling

Two Clock Domains The SOC series can have two independent domains of the

master clock sources. One is the “digital clock domain”.

The master clock of the digital clock domain is used for

digital channel boards mainly, and it can be also used for

the analog modules.

The other is the “analog clock domain”. The master clock

of the analog clock domain is used for analog modules

only.

Independent Analog Period

(Period of sampling driven by

another master clock)

Output S ignal

from DUT

Digital Period

(Period of output generated by

vectors driven by a master clock)

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AWG G3 PAD FOR PS3 Especificações Página 49