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Appendix
Appendix A-5
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.
RS-232C Protocol
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
1 Press the EDIT/NO button on the deck while
holding down the STOP button.
The Setup menu appears in the display window.
2 Turn the AMS control to display the menu item
you want to set (F13: baud rate, F14: parity bit, or
F15: stop bit).
3 Press the AMS control.
4 Turn the AMS control to select the setting value.
5 Press 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.