Thermo Finnigan SpectraSYSTEM UV6000LP, Справочное руководство

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1-4 Thermo Electron January 2004
The photodiode array is mounted on the Array Acquisition PCBA
which also contains all of the analog detection circuitry. The diode
array is continuously scanned at a 20-Hz rate, the light intensity at
each diode is converted to a 20-bit digital word, and these are stored
in a dual-port RAM (Random Access Memory) on the CPU PCBA.
As the data points are stored through one RAM port, the CPU reads
the data it needs (based on user parameters entered through the
software) through the other RAM port, processes the data, and sends
it to the personal computer.
The CPU PCBA also processes remote inputs and outputs through the
Transition PCBA which functions as a rear panel. A dual, 20-bit,
digital-to-analog converter on the CPU PCBA provides two, single-
wavelength analog outputs on the detector’s rear connectors. The
detector also contains a low-voltage power supply and a lamp power
supply.