FUNCTIONAL DESCRIPTION (continued)

Data Input

Shown below are the codes for the commands :

see Table 2.

The Data input will accept signals whose timing is

defined in Figure 6 and electrical characteristics

defined in the table of static electrical charac-

teristics. The EOT code must be transmitted after

each command after a min. period of 112ms.

Band Outputs

Four band outputs are provided for selection of the

signal band : VHF I & III, UHF and CATV. Band skip

logic is implemented so that by tieing the relevant

transmission in that band. The bands can be se-

lected only in a rolling sequence by the band se-

quence keyboard command. The sequence is as

follows : VHF III, UHF, VHF I, CATV.

Multi Standard Outputs

Two coded multi standard outputs (or general pur-

pose TV system flags) are provided so that the TV

set can be designed for use in areas of more than

one transmission standard. This function requires

an external decoder to realise 4 different standards

e.g. PAL 1, PAL 2, NTSC, SECAM etc. The multi

standard sequence command available from the

keyboard gives a simple binary count at the two

outputs : 00, 01, 10, 11, 00 etc. In Standby and Off

states the multistandard outputs are pulled to logic

LO.

Table 2 : Data Commands

Command

Number

Function

Code

16 Programs

20 Programs

D0

D1

D2

D3

D4

0

1

2

3

4

5

6

EOT

Program 1

Program 2

Program 3

Program 4

Program 5

Program 6

EOT

Program 1

Program 2

Program 3

Program 4

Program 5

Program 6

0

1

1

1

0

1

0

0

0

0

1

0

0

1

0

0

0

0

1

1

1

0

0

0

0

0

0

0

0

0

0

0

0

0

0

7

8

9

10

11

12

Program 7

Program 8

Program 9

Program 10

Program 11

Program 12

Program 7

Program 8

Program 9

Program 0

– 10 (decade)

+ 10 (decade)

1

0

1

0

1

0

1

0

0

1

1

0

1

0

0

0

0

1

0

1

1

1

1

1

0

0

0

0

0

0

13

14

15

16

17

18

Program 13

Program 14

Program 15

Program 16

Normalise

Volume up

1*

NOP

NOP

NOP

Normalise

Volume up

1

0

1

0

1

0

0

1

1

0

0

1

1

1

1

0

0

0

1

1

1

0

0

0

0

0

0

1

1

1

19

20

21

22

23

24

Volume down

Contrast up

Contrast down

Brightness up

Brightness down

Saturation up

Volume down

Contrast up

Contrast down

Brightness up

Brightness down

Saturation up

1

0

1

0

1

0

1

0

0

1

1

0

0

1

1

1

1

0

0

0

0

0

0

1

1

1

1

1

1

1

25

26

27

28

29

30

Saturation down

Memory Seq. up.

Memory Seq. down

On/standby (toggle)

Standby

Mute (toggle)

Saturation down

Memory Seq. up.

Memory Seq. down

On/standby (toggle)

Standby

Mute (toggle)

1

0

1

0

1

0

0

1

1

0

0

1

0

0

0

1

1

1

1

1

1

1

1

1

0

1

1

1

1

1

NO TRANSMISSION (pulled up)

1

1

1

1

The above table shown the difference between the 16 and 20 program options with respect to the Data input commands.

Commands 10, 11, 12 & 13 change function between the two options. Commands 14, 15 & 16 should not be used in the 20 program option,

as they have no function.

NOP = No operation.

M494

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