Creating and Downloading User-Data Files

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

PRAM. (Volatile memory resides on the BBG.) Table 8- 2 shows the maximum file sizes by modulation format and baseband generator option.

Table 8-2 Maximum User File Size

Modulation

 

Baseband Generator Option

 

 

 

 

 

 

Format

 

001, 601

 

002

 

602

 

 

 

 

 

 

 

 

 

 

Customa

800 kB

 

3.2 MB

 

6.4 MB

TDMAa

 

 

 

 

 

 

 

 

 

 

 

 

 

CDMAb

 

 

 

 

 

GPSb

10 kB

 

10 kB

 

10 kB

W- CDMAb

 

 

 

 

 

 

 

 

 

 

 

 

a.File size with no other files residing in volatile memory. b.File size is not affected by the BBG option.

For more information on signal generator memory, see “Signal Generator Memory” on page 281. To determine how much memory is remaining in non- volatile and volatile memory, see “Checking Available Memory” on page 285.

Determining Memory Usage for Custom and TDMA User File Data

For Custom and TDMA user files, the signal generator uses both non- volatile and volatile (PRAM/waveform) memory: you download the user file to non- volatile memory. To determine if there is enough non- volatile memory, check the available non- volatile memory and compare it to the size of the file to be downloaded.

After you select a user file and turn the format on, the signal generator loads the file into volatile memory for processing:

•It translates each data bit into a 32- bit word (4 bytes).

The 32- bit words are not saved to the original file that resides in non- volatile memory.

•It creates an expanded data file named AUTOGEN_PRAM_1 in volatile memory while also maintaining a copy of the original file in volatile memory. It is the AUTOGEN_PRAM_1 file that contains the 32- bit words and accounts for most of the user file PRAM memory space.

•If the transmission is using unframed data and there are not enough bits in the data file to create 60 symbols, the signal generator replicates the data pattern until there is enough data for 60 symbols. For example, GSM uses 1 bit per symbol. If the user file contains only 24 bits, enough

for 24 symbols, the signal generator replicates the data pattern two more times to create a file with 72 bits. The expanded AUTOGEN_PRAM_1 file size would show 288 bytes (72 bits ⋅ 4 bytes/bit).

Use the following procedures to calculate the required amount of volatile memory for both framed and unframed TDMA signals:

•“Calculating Volatile Memory (PRAM) Usage for Unframed Data” on page 294

•“Calculating Volatile Memory (PRAM) Usage for Framed Data” on page 294

Agilent N518xA, E8663B, E44x8C, and E82x7D Signal Generators Programming Guide

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Agilent Technologies E8663B, N5183A Determining Memory Usage for Custom and Tdma User File Data, Maximum User File Size
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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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