Heading 3 - rs-232 serial port parameters, Heading 3 - null modem – RGB Spectrum HDR 203HD User Manual

Page 11

Chapter 4—HDR 203HD RS-232 Serial Control

October 26, 1998

Page 7

RS-232 Serial Port Parameters

Duplex:

Full

Baud rate:

9600

Data bits:

Start bit:

Stop bit:

Parity: no

parity

Physical:

9-pin D-Sub (female)

Configuration:

D.C.E.

SW Handshake:

XOn/XOff

Ensure that the controlling host computer or ASCII terminal is set with the above serial
port parameters.

Null Modem

You may need to connect the HDR 203HD’s serial port adapter to a host computer con-
figured as

Data Communications Equipment.

This is done using a null modem. The net

effect of a null modem is to reverse the

Transmitted Data

and

Received Data

connections.

Also, the

Request to Send

and

Clear to Send

connections are reversed. This may be done by

using a special “null modem” cable, or by inserting a small “null modem” box or cable in

Data Terminal Ready

Ground

Data Set Ready

Request to Send

Clear to Send

---

D-Sub 9 pin

Description