RS-232C Protocol

RS-232C Protocol

The connection of MDS-B5 with an external personal computer allows MDS-B5 to be controlled from external equipment including the personal computer. This section describes its operating method from a viewpoint of electrical and software specifications.

Specifications

Format

 

Serial

 

Electrical characteristics

 

 

 

RS-232C compatible (not

 

 

compatible with the 9-pin remote

 

 

(RS-422A) such as Sony VTR for

 

 

professional use)

Connector

D-sub, 9-pin, male, inch screw

Pin assignment and I/O signals

Pin No.

I/O

Signal

Description

 

 

 

 

1

—

N. C.

Not used.

 

 

 

 

2

I

RxDATA

Inputs reception data.

 

 

 

 

3

O

TxDATA

Outputs transmission data.

 

 

 

 

4

O

DTR

Notifies that the set is ready

 

 

 

for communication.

 

 

 

 

5

—

GND

Ground

 

 

 

 

6

I

DSR

Acknowledges that the

 

 

 

personal computer is ready

 

 

 

for communication.

 

 

 

 

7

O

RTS

Notifies that the set

 

 

 

requests data transmission.

 

 

 

 

8

I

CTS

Acknowledges that the

 

 

 

personal computer requests

 

 

 

data transmission.

 

 

 

 

9

—

N. C.

Not used.

 

 

 

 

Operating Method
Synchronous mode between MDS-B5 and the personal computer

Adjust the transmission rate, bit length, parity and stop bit length. The following provides a setting method.

Contents of menu set screen

Items

Contents

Transmission rate

1200, 2400, 4800, 9600 (bauds)

 

 

Parity

OFF, ODD, or EVEN

 

 

Stop bit length

Stop bit1 or Stop bit 2

 

 

1Press the EDIT/NO button on the deck while holding down the STOP button.

The Setup menu appears in the display window.

2Turn the AMS control to display the menu item you want to set (F13: baud rate, F14: parity bit, or F15: stop bit).

3Press the AMS control.

4Turn the AMS control to select the setting value.

5Press the AMS control again to affect the selection. The settings are saved even after the power is turned off and on again.

Communication with the RS-232C interface terminal on the personal computer side

When connecting the RS-232C interface terminal of MDS-B5 with that of the personal computer, perform as follows:

Connect the DSR of MDS-B5 with DTR of the personal computer, and DTR of the set with DSR of the personal computer. These signals notify that both the MDS-B5 and the personal computer are ready for communication.

Also, connect the CTS of the MDS-B5 with RTS of the personal computer. The MDS-B5 does not transmit that data until the CTS is received (that is, the personal computer is ready). Likewise, connect the CTS of the personal computer with RTS of the MDS- B5 so that the communication that meets the processing capacity of the MDS-B5 can be made.

Appendix

Appendix A-5