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15 way D Input connector
The LPT box also has a standard 15 way D signal input. The signals on this connector are
treated in exactly the same way as the BNC connectors. So, sync combinations such as sync
on green can be used on this input, just as on the BNC connectors.
Data Input Connector – 15 way high density ‘D’
Pin 1
Pin 2
Pin 3
Pin 4
Pin 5
Pin 6
Pin 7
Pin 15
Red video – 1V 75Ω
Green video – 1V 75Ω
Blue video – 1V 75Ω
Not Used
Not Used
Red ground
Green ground
Not Used
Pin 8
Pin 9
Pin 10
Pin 11
Pin 12
Pin 13
Pin 14
Blue ground
Not Used
Sync ground
Sync ground
Not Used
Horizontal sync – (TTL levels)
Vertical sync – (TTL levels)
Connecting the LPT Box to TTL Video Signals
Connection of the LPT box to a TTL signal is
by optional Accessory Cable. The cable
converts TTL signal on 9 way D connector to
15 way D input on LPT box.
The standard TTL Accessory Cables:
30PH1244 for 3 or 6 BIT TTL video. This cable is used with most TTL signals.
9 way D
Pin No
Pin 1
Pin 2
Pin 3
Pin 4
Pin 5
Pin 6
Pin 7
Pin 8
Pin 9
3 bit video 6 bit video
(8 colours)
(64 colours)
GND (0v)
GND (0v)
nc
Red Intensity
Red
Red
Green
Green
Blue
Blue
nc
Green Intensity
nc
Blue Intensity
Horiz sync
Horiz sync
Vert sync
Vert sync
30PH1241 for 4 BIT TTL video. This cable is used where video signal has R, G, B video
plus a single “Intensity” input. The most common use of this was the old CGA standard.
9 way D
Pin No
Pin 1
Pin 2
Pin 3
Pin 4
Pin 5
Pin 6
Pin 7
Pin 8
Pin 9
4 bit video
(16 colours)
GND (0v)
nc
Red
Green
Blue
nc
Intensity
Horiz sync
Vert sync
LPT Box with TTL Accessory cable fitted
Note: These TTL Accessory Cables are not
supplied with 29LPT1002T and must be ordered
separately.
LG0172A
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