Creating and Downloading User-Data Files

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

Framed Binary Data

When using framed data, ensure that you use an even number of bytes and that the bytes contain enough bits to fill the data fields within a timeslot or frame. When there are not enough bits to fill a single timeslot or frame, the signal generator replicates the data pattern until it fills the timeslot/frame.

The signal generator creates successive timeslots/frames when the user file contains more bits than what it takes to fill a single timeslot or frame. When there are not enough bits to completely fill successive timeslots or frames, the signal generator truncates the data at the bit location where there is not enough bits remaining and repeats the data pattern. This results in a data pattern discontinuity. For example, a frame structure that uses 348 data bits requires a minimum file size of 44 bytes (352 bits), but uses only 43.5 bytes (348 bits). In this situation, the signal generator truncates the data from bit 3 to bit 0 (bits in the last byte). Remember that the signal generator views the data from MSB to LSB. For this example to have an even number of bytes and enough bits to fill the data fields, the file needs 87 bytes (696 bits). This is enough data to fill two frames while maintaining the integrity of the data pattern, as illustrated in the following figure.

Framed Data

 

 

 

 

 

Uneven Number of Bytes

 

 

Frame 1

(some data truncated)

Frame 2

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Ctrl

 

 

 

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348 data bits

 

 

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348 data bits

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Frame 1 data repeated

352 bits (44 bytes): 110100110110...01101111

 

 

 

LSB

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Frame 1 data

 

Truncated data (bits 0–3)

 

 

MSB

 

not enough bits remaining to fill the next frame

 

 

 

 

 

 

Even Number of Bytes

 

 

Frame 1

 

 

(all bits used)

Frame 2

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Ctrl

348 data bits

 

 

Ctrl

 

 

 

Ctrl

 

348 data bits

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

696 bits (87 bytes): 011101100110110101110100110110...01101111 Data fills both frames (348 bits per frame) with no truncated bits

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For information on editing a file after downloading, see “Modifying User File Data” on page 302.

User File Size

You download user files into non- volatile memory. For CDMA, GPS, and W- CDMA, the signal generator accesses the data directly from non- volatile memory, so the file size up to the maximum file size (shown in Table 8- 2) for these formats is limited only by the amount of available

non- volatile memory. As seen in the table, the baseband generator option does not affect these file sizes.

For Custom and TDMA, however, when the signal generator creates the signal, it loads the data from non- volatile memory into volatile memory, which is also the same memory that the signal generator uses for Arb- based waveforms. For user data files, volatile memory is commonly referred to as pattern ram memory (PRAM). Because the Custom and TDMA user files use volatile memory, their maximum file size depends on the baseband generator (BBG) option and the amount of available

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Agilent Technologies N5183A MXG, N5181A/82A, E8663B manual User File Size, Framed Binary Data

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.