HP 8920A, User Manual

Page: 577 / 658

577
Chapter 24, Connector, Key, and Knob Descriptions
Connector Descriptions
SERIAL PORT
This connector is optional on the HP 8920A.
This 6-pin, RJ-11, dual serial port is used to input and output serial data for
entering programs, printing tests results and screen images, and sending test
results to a connected controller, disk drive, or terminal.
Operating Considerations
The serial communications settings are defined on the I/O CONFIGURE screen.
NOTE: Using Port B. The second serial port (B) is only used with IBASIC programs to communicate
with base stations or other equipment when the primary serial port is used for printing or data
collection. Port B cannot be used for printing screens, and its communication settings can only
be changed using IBASIC commands (listed in the Programmer’s Guide). Unless you are
writing IBASIC programs that require serial printing and other serial data transfer at the same
time, we recommend that you only use the primary port (A).
The IBASIC Controller sends and receives data to the serial ports using address 9
for the primary port, and 10 for Port B. For example, to enter data from the
primary serial port into a program variable named SDATA, you could use the
following command:
ENTER 9;SDATA
To send data from your program out of the primary serial port, you could use the
following command:
OUTPUT 9;SDATA
Use an RJ-11, 25-pin, RS-232 adapter (HP P/N 98642-66508) and RJ-11 cable
(HP P/N 98642-66505) to connect the Test Set to a serial printer, terminal, or
computer.
NOTE: RJ-11 Connectors. RJ-11 cables and adapters can be wired several ways. If you buy a cable
or adapter other than the HP parts listed, verify the connections for the pins indicated in the
following table before connecting cables to the instruments.