Creating and Downloading User-Data Files

User File Data (Bit/Binary) Downloads (E4438C and E8267D)

The signal generator accepts externally created and downloaded user file data for real- time modulation formats that have user file as a data selection (shown as <“file_name”> in the data selection SCPI command). When you select a user file, the signal generator incorporates the user file data (payload data) into the modulation format’s data fields. You can create the data using programs such as MATLAB or Mathcad. The following table shows the available real- time modulation formats by signal generator model:

E4438C ESG

CDMAa

TDMAb

 

 

Customc

W- CDMAd

 

 

GPSe

- - -

 

 

E2867D PSG

Customc

a. Requires Option 401.

b.Real-time TDMA modulation formats require Option 402 and include EDGE, GSM, NADC, PDC, PHS, DECT, and TETRA.

c.For ESG, requires Option 001, 002, 601, or 602, for PSG requires Option 601 or 602.

d.Requires Option 400.

e.Requires Option 409.

The signal generator uses two file types for downloaded user file data: bit and binary. With a bit file, the signal generator views the data up to the number of bits specified when the file was downloaded. For example, if you specify to use 153 bits from a 160 bit (20 bytes) file, the signal generator transmits 153 bits and ignores the remaining 7 bits. This provides a flexible means in which to control the number of transmitted data bits. It is the preferred file type and the easiest one to use.

With a binary file, the signal generator sees all bytes (bits) in a downloaded file and attempts to use them. This can present challenges especially when working with framed data. In this situation, your file needs to contain enough bits to fill a frame or timeslot, or multiple frames or timeslots, to end on the desired boundary. To accomplish this, you may have to remove or add bytes. If there are not enough bits remaining in the file to fill a frame or timeslot, the signal generator truncates the data causing a discontinuity in the data pattern.

You download a user file to either the Bit or Binary memory catalog (directory). Unlike a PRAM file (covered later in this chapter), user file data does not contain control bits, it is just data. The signal generator adds control bits to the user file data when it generates the signal. There are two ways that the signal generator uses the data, either in a continuous data pattern (unframed) or within framed boundaries. Real- time Custom uses only unframed data, real- time TDMA modulation formats use both types, and the others use only framed data.

NOTE For unframed data transmission, the signal generator requires a minimum of 60 symbols. For more information, see “Determining Memory Usage for Custom and TDMA User File Data” on page 293.

You create the user file to either fill a single timeslot/frame or multiple timeslots/frames. To create multiple timeslots/frames, simply size the file with enough data to fill the number of desired

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Agilent Technologies N5181A/82A, N5183A MXG, E8663B manual E4438C ESG
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N5183A, N5183A MXG, E8663B, N5181A/82A specifications

Agilent Technologies is renowned for its innovative solutions in electronic test and measurement equipment. Among its offerings are several signal generators including the N5181A, N5182A, E8663B, and N5183A MXG. These models are distinguished not only by their performance but also by their versatility across various applications in communications, aerospace, and electronics.

The Agilent N5181A and N5182A, part of the MXG family, are highly versatile signal generators known for their exceptional frequency performance and flexibility. The N5181A operates from 100 kHz to 6 GHz, while the N5182A extends that range up to 12 GHz. They provide high fidelity signals with low phase noise, making them ideal for the development and testing of RF components and systems. These generators support a wide variety of modulation formats, including AM, FM, PM, and pulse modulation, catering to diverse application needs.

The E8663B, meanwhile, is designed for the range of 250 kHz to 3 GHz and is also recognized for its high-performance features. Its built-in capabilities for modulation make it effective for testing wireless devices, ensuring that signals can be simulated accurately in both laboratory and field environments. It is especially beneficial for users requiring a straightforward and efficient solution with high reliability.

The N5183A MXG signal generator enhances the lineup with frequency coverage up to 6 GHz and advanced capabilities. It integrates various modulation capabilities while ensuring high signal integrity. Its architecture is tailored for both production test environments and research applications, providing users with the flexibility to adapt to changing testing requirements.

Common characteristics across these models include a user-friendly interface that simplifies configuration and operation. They are often equipped with LAN and USB interfaces for easy remote control and integration into automated test systems. The robustness of these generators allows them to perform reliably in challenging environments, making them essential tools in laboratories, manufacturing floors, and field testing scenarios.

In summary, Agilent's signal generators, including the N5181A, N5182A, E8663B, and N5183A MXG, represent a blend of advanced technology, flexibility, and precision. These instruments are vital in facilitating the evolution of cutting-edge communication technologies, ensuring that designers and engineers can confidently meet the demands of modern electronics.
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