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Chapter 5, Reference (Alphabetical)

Serial Port

This 6-pin, RJ-11 serial port is used to input and output serial data. Serial data is

used for entering programs, printing, and for 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.

Ground is used with both IBASIC and all other serial connections. Transmit B and

Receive B are exclusively used with IBASIC programs. Transmit and Receive are

used with all other serial connections (see

figure 1).

The IBASIC Controller sends data to and receives data from the serial ports using

address 9 for the primary port, and address 10 for Port B.

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 HP 8920A,B,D to a serial printer or terminal/

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 16 before connecting cables to the instruments.

The following table 16 lists connections for Transmit, Receive, and Ground pins

(address 9).

Table 16 Examples of Common Escape Sequences

HP 8920A

RJ-11 Serial Port

Terminal/PC

25-Pin RS-232

Terminal/PC

9-Pin RS-232

Pin 2 (RX) to pin 2 (TX) or pin 3 (TX)

Pin 5 (TX) to pin 3 (RX) or pin 2 (RX)

Pin 4 (GND) to pin 7 (GND) or pin 5 (GND)