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COl MISCELLANEOUS CONVERTERS
Logic DAC for converting the 4221 code output of a Hew1ett
Packard 5245L or 4246L Counter to an analogue signal for
operating a pen recorder. Includes PN2/22A. CH1/12A.
DD 1969. DD Spec 5.183. OBSOLESCENT.
Serial to parallel 8 bit Converters,
BBC/ISEP printed circuit board with
Indexing positions 3, 17, 21. DD 1971.
used in RD4/8.
25 way connector.
Parallel to serial 8 bit Converters, used in RD4/8.
BBC/ISEP printed circuit board with 25 way connector.
Indexing positions 3, 17, 23. DD 1971. OBSOLESCENT.
Binary Converter used in EP1M/522 for converting serial
binary data in the form of 11 bit characters, to 8 bit
parallel binary data. Printed circuit board with 33 way
ISEP connector. DD 1970. OBSOLESCENT.
ADC Video Converter used in EP1M/525 to convert the
analogue video signal into a 8 bit p.c.m. digital signal
in parallel form, i.e. on 8 separate connectors, at a
normal conversion rate of about 13M/s conversions. Two
254mm x 178mm ISEP boards with a 254mm x 279mm board
mounted between them. DD 1970. WITHDRAWN.
DAC Video Converter used in EP1M/525 to convert the
digital signal from C01/503 into an analogue signal.
254mm x 178mm ISEP board. DD 1970. WITHDRAWN.
Serial to Parallel Converter, used with CD3/517 to convert
serial binary data with strobe pulses to parallel form.
x 203mm printed circuit
board with 71 way edge connector. DD 1972.
DD Spec 7.260.
C02 FREQUENCY CONVERTERS
Frequency Divider used on PA1/28 and PA1/29.
DD Spec 2.172. OBSOLESCENT.
Frequency Converter used in EP7/505 to multiply the
frequency of the first oscillator to the value required by
UN1/554. Printed circuit board. DD 1965. OBSOLESCENT.
Used in EP1/4 to divide input from C02/4 to give outputs
of 1, 2 c/s and 1, 2 c/minute. CH1/24A with 12 UN9/528, 2
AM4/516A. DD 1965. CANCELLED.