Creating and Downloading User-Data Files

Pattern RAM (PRAM) Data Downloads (E4438C and E8267D)

PRAM File Size

Because volatile memory resides on the baseband generator (BBG), the maximum PRAM file size depends on the installed baseband generator option, as shown in Table 8- 7.

Table 8-7 Maximum PRAM User File Size (Payload Bits Only)

Modulation

 

Baseband Generator Option

 

 

 

 

 

 

Format

 

001, 601

 

002

 

602

 

 

 

 

 

 

 

 

 

 

Custom

8 Mbitsa

 

32 Mbitsa

 

64 Mbitsa

TDMA

 

 

 

 

 

 

 

 

 

 

 

 

 

 

a. File size with no other files residing in volatile memory.

The maximum PRAM user file size in the table above refers to the maximum number of payload bits. After downloading, the signal generator translates each downloaded payload bit into a 32- bit word:

•1 downloaded payload bit

•7 downloaded control bits as shown in Table 8- 5 on page 310

•24 bits added by the signal generator

The following table shows the maximum file size after the signal generator has translated the maximum number of payload bits into 32- bit words.

Table 8-8 Maximum File Size After Downloading

Modulation

 

Baseband Generator Option

 

 

 

 

Format

 

001, 601

 

002

602

 

 

 

 

 

 

 

 

Custom

32 MBytesa

 

128 MBytesa

256 MBytesa

TDMA

 

 

 

 

 

 

 

 

 

 

 

a. File size with no other files residing in volatile memory.

To properly size a PRAM file, you must determine the file size after the 32- bit translation process. The signal generator measures a PRAM file size in units of bytes; each 32- bit word equals 4 bytes.

Determining the File Size

The following example shows how to calculate a downloaded file size using a PRAM file that contains

89 bytes (payload bits plus 7 control bits per payload bit): 89 bytes + [(89 ⋅ 24 bits) / 8] = 356 bytes

Because the file downloads one fourth of the translated 32- bit word, another method to calculate the file size is to multiply the downloaded file size by four:

89 bytes ⋅ 4 = 356 bytes

See also “Signal Generator Memory” on page 281 and “Checking Available Memory” on page 285.

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Agilent Technologies E8663B manual Pram File Size, Determining the File Size, Maximum Pram User File Size Payload Bits Only
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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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