Main Features

Two RS422 ports, Connections to Standard Sony RS-422 pin-out

Port A may be configured as a Controller (O/P)or Device (I/P) using internal links

Port B is configured as a Controller (O/P)

Windows 98, ME, 2000 and XP Drivers

MAC OS-X Driver

Linux Driver

Optional Video Sync Reference input

Tx and Rx LED's on both ports

Slew Rate Limited RS422 drivers to minimise EMI and reduce reflections

Sample Windows Program on website

Rugged extruded aluminum box

WEEE/RoHS Compliant

Design
RS422 Interface

Slew Rate Limited RS422 drivers to minimise EMI and reduce reflections on incorrectly terminated connections. Pin-out and termination as per standard Sony connection. Port A may be configured as a Device (I/P) or as a Controller (O/P). Port B is configured as a Controller (O/P), to use as a Device a Tx/Rx invert lead must be used.

USB Interface

CB Electronics have for a number of years used USB-RS232 interfaces both with and without RS232-RS422 converters. In designing the USB422 we used the experience with many different manufactures to chose the best combination of hardware and drivers.
Drivers for Windows 98, ME, 2000 and XP with MAC OS-X and Linux are all available from our web site. The USB422 windows drivers are optimised for minimum latency. When installed on Windows the port numbers are set to the last two free port numbers, this may be changed using the driver parameters.

Video Input

The video sync input is converted to a frame rate square wave and is connected to the Port A CTS Interrupt input. The CTS input level after the change interrupt indicates the video field.

Test Program

A test programme that provides both machine control and a virtual machine is available from our web site. The program locks both the virtual machine (Port-A) and machine control (Port-B) to video syncs. The program is written in Delphi (Object Pascal).

Interrupt Performance

Checks on a 1.4GHz XP system using the Delphi test program measured a delay of 0.5-2.0 Milli-Seconds between the frame edge and a triggered message. No noticeable change in the delay was observed during screen re-draws. Disc access can cause delays.

Size

4.4 x 2.1 x 1.2 (112 x 55 x 31) excluding connectors