Product Manual

7526A
Users Manual
5-4
Set Up the RS-232 Port for Remote Control
The Product is programmable with a standard RS-232 connection with a PC. The RS-232
cable for the port must be shorter than 15 meters (50 feet). Longer cables are permitted if
the load capacitance measured at a connection point (including signal terminator) is not
larger than 2500 pF.
The serial communications parameters in the Product are set at these values:
• 9600 baud
• 8 data bits
• 1 stop bit
• no parity
• Xon/Xoff
• EOL (end-of-line) character CR (Carriage Return)
A typical RS-232 connection is shown in Figure 5-1. Note that a null modem cable is
used for the connection. See the “Rear Panel” section in Chapter 1 for the location of the
RS-232 port on the rear panel of the Product.
7526A
Calibrator
UUT
Controller
COM Port
SERIAL Port
Null Modem Cable
gwp031.eps
Figure 5-1. RS-232 Remote Connection