Model 428 User’s Manual REMOTE COMMUNICATIONS
Bristol Instruments, Inc. 37
5 REMOTE COMMUNICATIONS
The 428 system can transfer measurement data to a PC or be controlled remotely by a
PC using the USB or Ethernet interfaces. A GPIB interface is also available as a factory
installed option. Connections for the USB, Ethernet, and GPIB interfaces are located on
the back panel of the instrument. The Standard Commands for Programmable
Instruments (SCPI) communications scheme is used to communicate with the 428
system.
Communications Setup
USB Interface
The 428 system’s driver software converts the USB port to a virtual COM port. Any
software that can communicate with a COM port can communicate with the 428
system’s USB interface, if the PC’s COM port matches the baud rate of the 428 system,
which has default value of 921600. In addition, the PC’s communication software must
also be set for 8 bits, no parity, 1 stop bit, and no handshaking.
NOTE: For the vast majority of user applications, the default rate of 921600 is the
correct Baud Rate for the 428 system and should not be changed. If the USB Baud Rate
must be changed, use the Select button to highlight the USB Baud Rate value on Config
Screen 4 and use the Change or Arrow buttons to change the USB Baud Rate.
Installation of the Virtual COM Port Driver Software
1 Insert the Application Software CD into your CD-ROM drive. If Autorun is
enabled on your system, installation will start automatically. Otherwise, double
click on the installer to begin.
2 Once the software is installed, a shortcut to the NuView Display Software will
automatically be placed on the Start Menu (or Application Menu) of the PC.
3 Make sure the supplied USB cable is connected to the USB connector on the
back panel of the 428 system and to a USB port on the PC.
4 Turn the 428 system on. The message “Found New Hardware” should appear on the
PC display, followed by an automatic identification and installation of the virtual COM
port driver.
5 The 428 system is now ready for communication via the USB interface.
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