Creating and Downloading User-Data Files

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

Event 1 output is set to 0 or 1 depending on the sync out selection, which enables the EVENT 1 output at either the beginning of the frame, beginning of a specific timeslot, or at all timeslots (SCPI command, :RADio:GSM:SOUT FRAMESLOTALL).

Because timeslots are configured and enabled within the signal generator, a user file can be individually assigned to one or more timeslots. A timeslot cannot have more than one data source (PN sequence or user file) specified for it. The amount of user file data that can be mapped into hardware memory depends on both the amount of PRAM available on the baseband generator, and the number and size of each frame. (See “Determining Memory Usage for Custom and TDMA User File Data” on page 293.)

PRAM adds 31 bits to each bit in a frame, which forms 32- bit words.

The following shows how to calculate the amount of PRAM storage space required for a GSM superframe:

Bits per superframe = normal GSM timeslot ⋅ timeslot per frame ⋅ speech multiframe(TCH) ⋅ superframe

size of normal GSM timeslot = 156.25

timeslots per frame = 8 timeslots.

bits

 

speech multiframe(TCH) = 26 frames

superframe = 51 speech multiframes

1.Calculate the number of bits in the superframe:

156.25⋅ 8 ⋅ 26 ⋅ 51 = 1,657,500 bits

2.Calculate the size of the PRAM file:

1,657,500 bits ⋅ 4 bytes (32- bit words) = 6,630,000 bytes

3.Calculate how much memory the PRAM file will occupy

6,630,000 bytes / 1,024 bytes per PRAM block = 6,474.6 memory blocks

4.Round the quotient up to the next integer value

6,475 blocks ⋅ 1,024 bytes per block = 6,630,400 bytes

NOTE For the total PRAM memory usage, be sure to add the number of PRAM blocks that the user file occupies to the PRAM file size. For more information, see “Calculating Volatile Memory (PRAM) Usage for Framed Data” on page 294.

Real-Time Custom High Data Rates

Custom has two modes for processing data, serial and parallel. When the data bit- rate exceeds

50 Mbps, the signal generator processes data in parallel mode, which means processing the data symbol by symbol versus bit by bit (serial). This capability exists in only the Custom format when using a

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Agilent Technologies N5181A/82A, N5183A MXG, E8663B manual Real-Time Custom High Data Rates
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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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