Agilent Technologies E4406A VSA Overview of the RS-232Bus, Settings for the Serial Interface

Models: E4406A VSA

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Overview of the RS-232 Bus

Programming Fundamentals

Overview of the RS-232 Bus

Overview of the RS-232 Bus

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Serial interface programming techniques are similar to most general I/O applications. Refer to your programming language documentation for information on how to initiate the card and verify the status.

Due to the asynchronous nature of serial I/O operations, special care must be exercised to ensure that data is not lost by sending to another device before the device is ready to receive. Modem line handshaking can he used to help solve this problem. These and other topics are discussed in greater detail in your programming language documentation.

Settings for the Serial Interface

Please refer to the documentation on your computer and I/O to configure the serial bus. Some common serial interface configuration settings are:

Baud Rate to

9600

Bits per character to

8

Parity to

Odd and disabled

Stop bits to

1

Handshake and Baud Rate

To determine hardware operating parameters, you need to know the answer for each of the following questions about the peripheral device:

Which of the following signal and control lines are actively used during communication with the peripheral?

Data Set Ready (DSR)

Clear to Send (CTS)

What baud rate is expected by the peripheral?

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Chapter 2

Page 124
Image 124
Agilent Technologies E4406A VSA Overview of the RS-232Bus, Settings for the Serial Interface, Handshake and Baud Rate