Verifying System Functionality

3

To perform the system functional verification test (continued)

Step

Action

Notes

 

 

 

 

13 Make the DC and RF

a

Reconnect the attenuator.

• This opens the Atten model window’s

measurements in IC-CAP.

b

In the Atten model window, click the

Macros tab folder.

 

 

Macros tab.

• This starts a sequence of prompts and

 

c

In the Select Macro: list, select Test_atten

responses.

 

 

and click Execute.

• IC-CAP performs measurements of the

 

d

When prompted to ensure you have

attenuator’s DC and RF parameters.

 

 

calibrated the network analyzer, enter Y

• When complete, IC-CAP displays plots

 

 

and click OK.

of the forward and reverse DC voltage

 

e

When prompted to enter a cal set number

transfer through the attenuator. The

 

 

use the default (1) and click OK.

solid line is the measured data, the

 

f

As IC-CAP performs an optimization,

dashed line is the simulated data.

 

 

observe the simulated data trace converge

• IC-CAP begins the optimization process

 

 

with the measured data trace.

using default simulated data. These

 

 

 

values are optimized to converge with

 

 

 

the measured data.

14 Interpret the results.

a

Observe the displayed plots.

 

b

In the IC-CAP/Status window, observe the

 

 

final DC/RF values parameter and the Final

 

 

RMS error.

•When the S-parameter measurement is

complete, IC-CAP displays plots of the

S12/21, 20× log10 of the S21 magnitude, and S21 phase.**

•IC-CAP also lists the attenuator’s resistance values. The error between measured and simulated data should be less than 2%.

•The error between the measured and simulated S21 phase data should be less than 2%.

•The value for T1.TD is the transmission time through the attenuator, modeled as transmission line delay. This value (typically in the femtosecond to nanosecond range) depends on the length of the attenuator.

•The S21 magnitude and the S12/S21 plots, of less significance, are included for your interest.

•The S21 simulated trace is determined from the measured DC resistances, and therefore is not expected to converge with the measured data over the full frequency range. However, the measured S21 data will show a normal frequency response variation.

•The S12/S21 plot (also displayed on the network analyzer) confirms that the system is capable of making forward and reverse transmission measurements.

Installation and User’s Guide

99

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Agilent Technologies 85225F manual Macros tab
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85225F specifications

Agilent Technologies 85225F is a high-performance microwave signal generator designed for the most demanding test and measurement applications in the RF and microwave frequency domains. This versatile instrument is a vital tool for engineers and technicians who require precise and reliable signal generation in various fields such as telecommunications, aerospace, and electronic warfare.

One of the main features of the Agilent 85225F is its frequency coverage, which spans from 0.1 to 26.5 GHz. This broad frequency range allows users to address a wide array of applications, including component testing, system verification, and radar signal simulation. With exceptional frequency resolution and accuracy, the 85225F ensures the generation of clean and stable signals tailored to specific operational requirements.

The 85225F incorporates advanced phase-locked loop (PLL) technology, which contributes to its superior frequency stability and low phase noise. This technology is crucial for applications requiring precise signal integrity and minimal jitter, such as digital communications and high-frequency circuit testing. The instrument’s low phase noise is particularly advantageous for sensitive measurements and data transmission systems where signal quality is paramount.

In addition to its impressive frequency and phase noise characteristics, the Agilent 85225F features multiple modulation capabilities, including amplitude modulation (AM), frequency modulation (FM), and pulse modulation. These modulation options enable users to simulate a wide variety of real-world signals and testing conditions, enhancing the versatility of the instrument in various testing environments.

The 85225F also offers a user-friendly interface that facilitates ease of operation. The clear LCD screen displays essential parameters and settings, allowing users to make adjustments quickly and efficiently. Furthermore, the instrument supports remote programming and automation through its GPIB or LAN connectivity options, making it suitable for integration into larger test systems.

Another notable characteristic of the Agilent 85225F is its compact design, which does not compromise on performance. This space-saving design makes it ideal for both lab and field applications, allowing engineers to transport the generator with ease, while still maintaining the ruggedness required for demanding environments.

Overall, the Agilent Technologies 85225F stands out as a robust and reliable microwave signal generator, equipped with state-of-the-art features and technologies that cater to the needs of modern RF testing. Its broad frequency coverage, advanced modulation capabilities, low phase noise, and user-friendly interface make it an essential tool for a wide range of applications in the RF and microwave sector.
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