AWG G3 PAD FOR PS3 Spécifications télécharger pdf (Page 223)

Sampler 7 Analog Modules

System Reference, January 2001

223

Sampler Unit

The sampler unit periodically samples the high speed

input signal and holds it until the analog-to-digital

converter converts it into digital data. The sampling

period is set to a multiple of the input signal plus a small

amount of time. Thus, the frequency of the input signal is

converted to one that is low enough to enable the analog-

to-digital converter to convert the level of the input signal

into digital data.

Analog-to-Digital Converter (ADC)

The analog-to-digital converter (ADC) converts the level

sampled by the sampler unit to the digital data according

to the conversion clock provided by the clock distributor.

Clock Distributor

The clock distributor receives the conversion clock from

the timing generator, adjusts the edge timing and provides

the clock to the sampler unit and the ADC in both chan-

nels.

Channel Multiplexer

The channel multiplexer separately transfers digital data

from ADCs in both channels to the waveform memory.

Timing Generator

The master clock and trigger signal are input to the timing

generator. After receiving the trigger signal, the timing

generator starts to generate the conversion clock by

dividing the master clock and feeds the conversion clock

to the ADC and sampler unit via the clock distributor. The

timing generator also sends the start signal to the

sequencer. The timing generator stops to generate the

conversion clock when the sequencer is halted.

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AWG G3 PAD FOR PS3 Spécifications Page 223