Philips LTC 3963/51 Operating the VCR from a Personal Computer, Ascii code, OSD Display Data

Models: LTC 3963/51

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OPERATING THE VCR FROM A PERSONAL COMPUTER

Connect this VCR to a personal computer via the RS-232C interface jacks to remote control the VCR by oper- ating the computer. You can also display the status of the VCR on the monitor screen to check it.

RS-232C Interface Specifications Communication system: Full duplex

Communication rate:

1200/2400/4800/9600 BAUD (The rate can be specified using the SELECTION MENU

 

screen. This is set to 9600 BAUD at the factory.)

Communication format:

Start:

1 bit

 

Data:

8 bits

 

Parity:

None

 

Stop:

1 bit

Communication codes:

Two types, the ASCII and display character codes

ASCII code

 

 

 

 

 

 

 

 

The codes with diagonal line are not used.

 

0 1 2 3 4 5 6 7 8 9 A B C D E F

0

 

 

SX

EX

 

 

 

 

 

 

 

 

 

 

1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

2

(blank)

!

 

 

 

 

 

 

 

 

,

 

3

0

1

2

3

4

5

6

7

8

9

:

<

>

?

4

 

A B C D E F G H I J K L M N O

5

P Q R S T U V W X Y Z

 

 

 

6

 

 

 

 

 

 

 

 

 

 

 

 

 

 

7

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Display character code

The codes with diagonal line are not used.

 

0

1

2

3

4

5

6

7

8

9

A B C D E F

0

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

2

(blank)

 

 

$

%

&

(

)

+

,

– .

/

3

0

1

2

3

4

5

6

7

8

9

:

;

 

=

?

4

 

A B C D E F G H I J K L

M N O

5

P Q R S

T U V W X Y Z

 

 

 

 

6

 

a

b

c

d

e

f

g

h

i

j

k

l

m n

o

7

p

q

r

s

t

u

v w x

y

z

 

 

 

 

Communication Protocol

1.Be sure to attach an “SX” code at the start of communications and an “EX” code at the end. The VCR does not accept the command without these codes.

2.The VCR only transmits a reply to the received command.

3.When the VCR receives one of the remote control commands shown on page 25, it returns the status for reception acknowledgment or the status requested currently.

4.If the commands are transmitted consecutively or another command is transmitted before the VCR has ended an operation, the VCR returns the “SX”BUSY”EX” code. Re-transmit the command.

5.If there is a mistake in the received communications format, the VCR returns one of the following commu- nication error codes.

ERL:

Error in code length

ERC:

Error in code format

ERT:

Error inside the VCR (when return is not possible within about 2 seconds)

6.When the VCR detects a communications error such as a stop bit error, bit length error, etc., it replaces the received byte with “!” for processing.

If a communications error occurs in the OSD display data, the OSD character is replaced with “!”. If a communications error occurs in data other than the above, a communications error code is returned.

OSD Display Data

When the date and hour are displayed or nothing is displayed (only the picture is displayed), up to 12 characters are displayed at the position shown in the figure.

Up to 12 characters are displayed at this position.

20–12–1999 MON A00

14 : 30 : 27 09

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Page 25
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Philips LTC 3963/51 Operating the VCR from a Personal Computer, Ascii code, Display character code, Communication Protocol