UN26/45A
UN260046 UN26S/46
UN260047 UN26/47
UN260048 UN26/48
UN260049 UN26/49
UN2600S0 UN26/S0
UN2600S2 UN26S/S2
Keyboard Interface. The unit comprises an 825S parallel
I/O device and bi-directional TTL buffering for six 8-bit
data busses to or from a UN23/130 parallel I/O unit. This
unit is designed for use in the MIC VDU (UN12M/513). Power
requirements +5V DC at SOOmA. CH1/64J (4U card). Parent
equipment UN2M/S13. DD 1982.
Microcomputer Unit. The Unit is a self-contained
microcomputer based on the Motorola MC 6803. The card
provides 20 input lines, 22 output lines, serial RS 422
input and output (1200 BAUD), timer function, 3 interrupt
inputs, one analogue output and one generated waveform
output from the Processor. It was designed for use in a
range of Time Code Units including Editrace, RD4L/S10.
Power requirements +SV, +12V, -12V. 4U BMM unsupported
card.
Parent
equipment
RD4L/510.
DD
1981.
DDMI
7.496(82). DDHB 7.301(82).
BBC Z80 Bus Extender Sub-unit. This unit forms half of the
bus extension system. It connects directly onto the
microprocessor bus and buffers all signals between the
mother board and 2 40-way IDC connectors accessible from
the front. It can be designated as the 'master' or 'slave'
unit by 'handbag' selection depending whether it shares the
bus with a CPU or not. Handbags also select whether the SV
and !12V are connected to the IDC connectors. Power
requirements
5V
(provided
by
the
bus).
4U unsupported
card. Parent equipment UN23/138. DD 1981.
Sample Silence Processing Unit. This uni t detects and
processes samples for a complete NICAM 3 dual channel frame
(Le.
3ms).
It
produces
on output
signal known as
the
'pause control signal' when all the samples have been
~-48dB relative to peak programme, for 3ms. Power
requirements +SV
at
2S0mA.
CH1/64J.
Parent
equipment
CD2M/23 Options 1 to 4 NICAM 3 Insertion Equipment. OD
1981. DDHB 6.220(83).
NICAM 3 Interpolator. Used in NICAM 3 Decoder to identify
parity errors and correct the samples by first-order
interpolation. Also provides error rate display and
outputs.
Power
requirements
SV
at
SOOmA.
CH1/64J.
Supersedes UN26/36. Parent equipment CD3M/33. DD 1981.
DDMI 6.387(81). DDHB 6.216(83).
Z80 Processor. This unit is the central processor for the
TV Waveform Analyser (ME3M/S02) and is based on a UN26/39,
Z80 (main board). Power requirements S volts ~IA. 4U Bffi1
Unsupported
Card.
Parent
equipment ME3M/S02.
Sub-units
UN26/39. DD 1981.
808S Processor. Microprocessor based data filter to sort
serial input data (ASCII) at 110 baud, initiate store and
print commands.
Facilities: 1.
2.
To program filter, storing
information in separate 8K RAM
chassis.
To read out 8K RAM contents as
required.
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