ADCs and Memories
2.3
The 9400A’s two identical input channels are equipped with a
I00 megasample/second (megasample/sec), 8-bit ADC and a 32 kiloword
acquisition memory (See Figure 2.1). This dual ADC architecture ensures
absolute amplitude and phase correlation, maximum ADC performance for
both single and dual channel acquisition modes, large record lengths
and high time resolution.
The 9400A’s two 32K acquisition memories simplify transient capture by
providing very long waveform records that capture waveform features
even when trigger timing is uncertain. In addition, very accurate time
measurement is made possible by a digitally controlled zoom providing
an expansion factor of up to I00 times the time base speed.
The 9400A oscilloscope is capable of acquiring and storing repetitive
signals at a Random Interleaved Sampling rate of 5 gigasamples/second
(gigasamples/sec). An exclusive high-precision time digitizing
technique enables measurement of repetitive signals to a bandwidth of
175 MHz at an effective measuring interval of 200 psec.
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