HDG-4000 ANALOG/DIGITAL VIDEO CALIBRATION GENERATOR SERIAL INTERFACE MANUAL
3
USB and RS-232 Serial Control Ports
The USB and RS-232 Serial Interfaces provide complete control of all HDG-4000
functions. Refer to the HDG-4000 User Manual for a description of all generator
functions and calibration patterns.
The HDG-4000 USB Control Port provides easy connectivity with the many
computers that no longer provide RS-232 connectors. The HDG-4000 USB port
emulates an RS-232 interface to provide easy compatibility with common PC or
Macintosh terminal programs such as HyperTerminal, and provides compatibility
with previous RS-232 based software written to control the AccuPel HDG-3000
Video Generator. RS-232 emulation also provides a serial control interface that is
easily accessible from software development tools for users that write their own
custom control programs.
The HDG-4000 RS-232 Control port provides backward compatibility with systems
that are already physically wired to support the AccuPel HDG-3000 Video
Generator’s RJ-12 port. It also allows long connections (50-100 feet or more)
using inexpensive, standard 4-wire telephone cables in new installations.
1
USB Port - USB Driver
To use the HDG-4000 USB port you must first download and install a USB Driver
on your computer. The USB driver is available from the AccuPel website
(
www.accupel.com
). Full instructions for installing the driver are included with the
download. You may then connect the HDG-4000 to a computer using a USB
cable with Type A Male connectors on both ends.
2
RS-232 Port – RJ-12 Connector
No software driver is necessary to use the HDG-4000 RJ-12 port, but you will
need to configure an inexpensive ($1-$5) DB9 Female to RJ-12 (RJ-11) adapter.
A standard 4-wire telephone cable can then be used to connect the HDG-4000
RJ-12 port to the RS-232 serial port of a personal computer. Adapters that can be
configured without any soldering are available from many on-line sources, some
computer stores, and electronic parts suppliers such as Fry’s.
The diagram shows the three wires to insert into the holes in the DB-9 connector
housing. Pin 1 is on the left side of the RJ-12 connector when facing the rear of
the HDG-4000, or when looking inside the adapter.
PC DB9
Connector
PC Function
HDG-4000 RJ-12
Connector
HDG-4000
Function
2
Rx
3
Tx
3
Tx
4
Rx
5
Ground
5
Ground
RS-232 Connector
Pin-out
RJ-12 Female
1
6
1
DB-9 Female
5
