Making a Basic Measurement

NOTE

NOTE

NOTE

Making a Basic Measurement

Viewing a Signal

Improving Frequency Accuracy

10.While not all of the zeros following the decimal in the active function block are significant, the numbers after the decimal in the marker annotation (upper-right corner of screen) are significant. To increase the accuracy of the frequency reading in the marker annotation, turn on the frequency count function.

a.Press Mkr Fctn.

•The Marker Fctn softkeys appear.

b.Press Marker Count.

•The Marker Count softkeys appear.

Note softkey Marker Count On Off. If Off is underlined, press the softkey to toggle marker count on.

As shown in Figure 3-5and Figure 3-6:

•The marker annotation changes from Mkr1 to Cntr1.

•The displayed resolution in the marker annotation improves.

When you use the frequency count function, if the ratio of the resolution bandwidth to the span is less than 0.002, the following message appears on the display: Freq Count: Reduce Span/RBW ratio

This indicates that the resolution bandwidth is too narrow.

11.Press Marker ➞, Mkr ➞ CF to move the 10 MHz peak to the center of the display.

Valid Marker Count Range

12.Move the marker down the skirt of the 10 MHz peak. Note that although the readout in the active function changes, as long as the marker is at least 26 dB above the noise, the counted value (upper-right corner of display) does not change (see Figure 3-6). For an accurate count, the marker does not have to be at the exact peak.

Marker count functions properly only on CW signals or discrete peaks. For a valid reading, the marker must be ≥26 dB above the noise.

13.Press BW/Avg, Res BW, then enter a new value. This action makes the resolution bandwidth the active function and allows you to experiment with different resolution bandwidth (RBW) values.

14.Press Marker, Off to turn the marker off.

After properly setting the analyzer to display your signal, you can save the settings as either a user preset (press System, Power On/Preset, Save

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Chapter 3

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Agilent Technologies E4440A manual Improving Frequency Accuracy, Valid Marker Count Range
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E4440A specifications

Agilent Technologies has long been recognized for its cutting-edge solutions in the realm of electronic test and measurement, and the E4440A is no exception. This spectrum analyzer is part of Agilent's renowned X-Series, which has set benchmarks in performance and versatility for RF and microwave applications. The E4440A stands out for its reliability, accuracy, and advanced signal analysis capabilities.

One of the most notable features of the E4440A is its exceptional frequency range. The device covers frequencies from 3 Hz to 9 kHz, allowing it to handle a wide array of signals, from low-frequency communications to high-frequency RF applications. By offering such broad bandwidth, the E4440A caters to various sectors including telecommunications, aerospace, and research and development.

In terms of specifications, the E4440A boasts a maximum amplitude measurement accuracy of ±0.7 dB, which is crucial for detailed signal analysis. Its 1 Hz to 30 MHz demodulation bandwidth allows users to accurately analyze complex modulated signals, making it ideal for capturing and decoding various communication formats.

Built on Agilent's exclusive technology, the E4440A integrates the advanced "Digital Signal Processing" capabilities, enhancing its measurement precision and speed. This technology not only improves the analyzer's dynamic range but also allows for quick identification and analysis of signals, ensuring that engineers can optimize performance and troubleshoot issues more effectively.

A unique characteristic of the E4440A is its robust user interface. The spectrum analyzer features a high-resolution display, which provides clear visualizations of signals. Additionally, its intuitive navigation simplifies operation, enabling both seasoned engineers and newcomers to utilize the device effectively without extensive training.

The E4440A is also equipped with a variety of built-in measurement capabilities, including distortion, modulation, and phase noise analysis. These tools empower users to assess the quality of their transmission systems comprehensively, thus facilitating improvements and innovations in design.

In conclusion, Agilent Technologies E4440A stands as a versatile spectrum analyzer that combines cutting-edge technology with user-friendly features. Its broad frequency range, high accuracy, and advanced analysis capabilities make it an essential tool for professionals in the RF and microwave sectors. Whether for research, development, or testing, the E4440A delivers the precision and reliability that engineers expect from Agilent Technologies.
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