HP 8920B - Page 385

385
Chapter 7, IBASIC Controller
Interfacing to the IBASIC Controller using Serial Ports
Serial Port 9. Serial Port 9 is used for developing and editing IBASIC programs
since it can be connected directly to the IBASIC Command Line field. It can also
be used for data I/O from an IBASIC program. Settings can be changed from the
I/O CONFIGURE screen, using IBASIC commands executed from the IBASIC
Command Line
field, or using IBASIC commands executed from an IBASIC
program.
Serial Port 10. Serial Port 10 is primarily used for data I/O from an IBASIC
program to a device-under-test- (DUT). Settings can be changed using IBASIC
commands executed from the
IBASIC Command Line field, or using IBASIC
commands executed from an IBASIC program but not from the I/O CONFIGURE
screen.
Reason for Two Serial Ports
A typical application uses serial port 10 to send and receive data to and from a
DUT and uses serial port 9 to print or log test results to a serial printer or PC.
In the program development environment, serial port 9 can be used to
communicate with the external PC or terminal, and serial port 10 can be
connected to a serial printer for generating program listings or as the destination
printer for the program itself. This is schematically shown in
figure 26 on page 387.
If simultaneous multiple serial I/O is not a requirement then only use serial port 9
as it can directly access the
IBASIC Command Line field.
For your convenience, figure 25 on page 386 and table 38 on this page, show the cables
and adapters that are available from Hewlett-Packard for connecting external devices to
the Test Set’s serial I/O ports. See figure 26 on page 387 for a wiring diagram to construct
your own cables. RJ-11 cables and adapters can be wired several ways. If you buy a cable
or adapter other than the HP parts listed in table 38, verify the connections for the pins
indicated, before connecting the cables to the Test Set.
Table 38 Available HP RS232 Serial Cables and Adapters
Device
(for RS232 Serial
connections)
Typical Uses Description
HP Part
Number
Single to Dual RJ-11
Adapter Cable
To connect to Serial
Ports 9 and 10
simultaneously
Single 6-pin RJ-11 (male) to Dual 6-pin
RJ-11 (female); 0.6-meter cable
08921-61031
Cable with Connectors Test Set to PC 6-pin RJ-11 (male) to 9-pin DB-9 (female);
2-meter cable
08921-61038