PN1/29J (4U BMM card with front panel).
Analogue to Digital Converter. Analogue to Digital
conversion of video signals, includes video low pass
filter and black level stabilisation. Video input IV p-p
into 75Q. Data output 8 bits, maximum sampling frequency
greater than 20MHz. Power requirements +15V, l50mA; +12V,
100mA; -12V, 500mA. PB1/29J. RD 1979.
Analogue to Digital Converter. This unit forms part of the
ME3M/502 Television Waveform Analyser. Its function is to
sample video signals my means of 48 separate sample and
hold circuits. These samples are then converted into 10-
bit binary codes by a slow speed ADC. The unit requires
samples. Power requirements +12V, -12V, +5V. 4U
unsupported card with 57-way edge connector. DDMI
9.301(83). DD 1980.
ADC Control Unit. This unit forms part of the ME3M/502
Television Waveform Analyser. Its function is to produce
sample pulses to drive two separate C08/507 ADC units. The
samples can be programmed in both width and position.
Power requirements +5V. 4U unsupported card with 57-way
edge connector. DD 1980.
Analogue-to-Digital Converter. This unit is very similar
to the C08/506. It differs from that unit in its power
connections. It is not equipped with a low pass filter,
although space is provided. Power requirements +5V, 250mA;
ADC and Pre-Filter. The unit which forms part of the Sub
Nyquist PAL distribution system, takes in a standard level
composite waveform and converts it into 10-bit parallel
digital words at emitter coupled logic levels. Internally
8-bit samples at 4fsc are digitally comb filtered to give
data path is incorporated to allow undistorted transmission
of field interval signals. Power requirements 240V a.c. at
approx 150W. PN3/54. Parent equipment used in conjunction
with other units of the 68 PAL System. C05/504, C08/509,
UN23/688. DD 1982. DDHB 1.176(83).
8-Bit High Speed ADC. Bandwidth of 20MHz, mounted as sub
board on a 4U card, incorporating balanced ECL clock and
data input with separate ground planes. Power requirements
-5.2V at 800mA, +15V at 150mA, -15V at 300mA. 4U
unsupported card with 'J' width front panel. RD 1983.
Triple Video Analogue to Digital Converter. The C08/512
accepts 3 analogue video feeds, and digitises each to 8-bit
precision. The video feeds may be RGB, YUV or PAL. The
anti-alias filters are installed to suit the application,
and the pre-ADC clamps are swi tchable. A PROM in each