All front panel rotary knobs and push buttons are constantly monitored
by the internal processor, and front panel setups are rapidly
reconfigured via the unit’s internal 16-bit bus. Data are quickly
processed according to the selected front panel setups, and are
transferred to the acquisition memory for direct waveform display or
stored in the 9400A’s reference memories.
The 68000 controls the unit’s two RS-232-C ports which are used to
directly interface the 9400A to a digital plotter, remote terminal or
other slow-speed device and also controls GPIB (IEEE-488) operation
when the 9400A is equipped with the I/O option, OP02.
2.3
ADCs and Memories
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.
The 9400A’s very low aperture uncertainty of 10 psec assures precision
measurements over its entire range as indicated by the table below:
Overall* dynamic accuracy (typical), RMS sine wave curve fit
Input Frequency (MHz)
1 10 50 100 175
Signal-to-noise Ratio (dB) 41.9
41.9 41.9 37.1 29.9
Effective bits
7.0
7.0
7.0 6.2 5.0
* including the front-end amplifier, sample and hold and ADC
9400A PERFORMANCE
Table 2.1
2-2
Product Description
To Next Page
Loading...
Need help?
General
