4. THEORY OF OPERATION page 31
4.2.5. Discriminator Card,
Refer to
The ±15 volt power supply voltages are regulated to ±12 volts and +5 volts used on this card. The card is lined with test points for measurement of the discriminator levels.
U7 generates the negative 10 volt reference used by the serial digital to analog voltage converters (U1,5,8,10). The converters are selected by the computer through the
4.2.6. Computer Interface Board,
Refer to
This board is located in the DOS machine. TSA Systems manufactures the
•
•Three - 8 bit I/O ports
•
•Four - differential line transmitters
•Two - ribbon connectors (50 & 34 pin)
which interface with the backplane (RCS- 130)
•The counters are used for the radiation detectors, motor encoders, etc.
•The ports are used for system control and discriminator setting.
•Port "C" has 4 differential line drivers and line receivers.
•The Address of the card is 1000.
Model