Chapter 5 Remote Interface Reference

Modem Communications

Modem Communications

This section gives details on communicating with the instrument from a remote PC using a modem. To communicate over the phone lines, you must have a PC and two modems. One modem is connected to your PC

(local modem) and the other is connected to the 34970A (remote modem). The steps below show how to set up a typical modem.

1.Connect the remote modem to your local PC.

2.Run the Windows Terminal or Hyper Terminal program to configure the modem. These programs can be found in the Accessories group.

3.Set the baud rate using the Terminal program to the same value used for the 34970A. For more information on setting the instrument’s baud rate, refer to “Baud Rate Selection” on page 152.

4.Configure the remote modem for auto answer, disable command echo, and disable result codes. Save these settings as the active profile. For example, when using a U.S. Robotics® 56K modem, the command string is “AT&F1S0=1E0Q1&W0”, where:

AT

Set the baud rate and configure the modem to expect more commands.

&F1

Place the modem in its factory configuration, which is compatible

 

with most PCs.

S0=1

Set to auto answer after one ring.

E0

Disable command echo mode.

Q1

Disable result codes.

&W0

Store settings for power-on profile.

5.Configure the 34970A for the “Modem” flow control mode

(for more information, see “Flow Control Selection” on page 153).

6.Remove the remote modem from the PC. Connect the remote modem to the 34970A using the RS-232 cable supplied (if you ordered the internal DMM) and modem adapter. The modem adapter is available in the 34399A Adapter kit.

7.After turning on the remote modem, you should notice that the AA (auto answer) light is on. When you turn on the 34970A, you should notice that the TR (instrument ready) light is on.

8.Connect the remote modem to the phone line. From the local modem, dial up the remote modem using BenchLink Data Logger or another software application.

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Agilent Technologies 34970A manual Modem Communications, For more information, see Flow Control Selection on, S0=1
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34970A specifications

Agilent Technologies 34970A is a versatile data acquisition and measurement system that has gained popularity in various industries, including research and development, manufacturing, and education. The primary purpose of the 34970A is to offer an efficient solution for data collection, monitoring, and analysis, which can significantly enhance productivity and accuracy in testing applications.

One of the main features of the 34970A is its modular design, allowing users to customize the system according to their specific measurement needs. The mainframe can accommodate up to three plug-in measurement modules, which can include various types of measurements such as analog, digital, temperature, and frequency. This modularity provides flexibility for users to tailor the system to their requirements, making it highly adaptable to different applications.

Another notable characteristic of the Agilent 34970A is its impressive channel configuration. The system can support up to 120 measurement channels when fully configured, enabling extensive data acquisition without the need for multiple devices. This capability is essential for applications requiring simultaneous monitoring of multiple parameters or locations.

The 34970A utilizes advanced signal processing technologies to ensure high-accuracy measurements. The internal 6.5-digit resolution multimeter provides precise readings, while the device also supports various input types, such as thermocouples and RTDs for temperature measurements. The ability to perform mathematical functions, such as summation and averaging, on the acquired data further enhances its usability.

For data storage and management, the Agilent 34970A features built-in memory for storing up to 20,000 readings. Users can also easily transfer data to a PC through the RS-232 interface or GPIB (IEEE 488) for further analysis and reporting. Additionally, it offers the capability to program automatic data logging and scheduling of measurements, which streamlines the testing process and reduces manual intervention.

In terms of user interface, the 34970A is equipped with a large graphical display that provides clear visualization of measurement data and easy navigation through settings and options. The menu-driven interface makes it accessible for users of all skill levels, simplifying the setup and operation of the device.

Overall, the Agilent Technologies 34970A stands out for its modularity, high channel capacity, advanced measurement technologies, and user-friendly interface. As a reliable and efficient data acquisition system, it is well-suited for a wide range of applications, making it an essential tool for engineers and technicians looking to enhance measurement precision and efficiency.
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