MEAN,25us,526us,579.6us,8 | Agilent Technologies E4406A VSA specs

Programming Fundamentals

Improving the Speed of Your Measurements

There are two versions of this command depending on your firmware revision. Earlier revisions require the optional variables be entered in terms of their position in the trace data array. Versions after A.05.00 allow the variables to be entered in terms of time.

For early firmware revisions you need to know the sample interval. In the waveform measurement it is equal to the aperture value. Query :WAVeform:APERture? to find the sample interval. (Note: the WAV:APER? command always takes decimation into account.) The sample interval (aperture value) is dependent on the settings for resolution bandwidth, filter type, and decimation. See the following table to see how these value relate.

The parameters for this GSM example are:

MEAN,9,197,1730 (or with later firmware:

MEAN,25us,526us,579.6us,8)

•MEAN calculates the mean of the measurement points indicated

•9 is how many points you want to discard before you look at the data. This allows you to skip over any “unsettled” values at the beginning

of the burst. You can calculate this start offset by (25∝s/sampleInterval)l

•197 is the length of the data you want to use. This would be the

portion of the burst that you want to find the mean power over. You can calculate this length by (526∝s/sampleInterval)

•1730 is how much data you have before you repeat the process. For this example it’s the time between the start offset point on the burst in the first slot (first frame) to the same spot on the burst in the first

slot (second frame). You can calculate this by

(576.9∝s*N/sampleInterval) where N is the number of data items that you want. In this case it is the number of slots in the frame, N=8.)

Table 2-1 GSM Parameters for 1 Slot/Frame Measurement

Requirements

Resolution	Filter	Decimation	Aperture	Start	Length	Repeat
Bandwidth	Type

500 or 300	Flat or	4 or 1	dependent	24 ∝seca	526 ∝seca	576.9 ∝seca
kHz	Gaussian		on settings

500 kHz	Gaussian	1	0.2 ∝sec	124	2630	2884.6

500 kHz	Gaussian	4	0.8 ∝sec	31	657	721.15

500 kHz	Flat	1	0.4 ∝sec	61	1315	1442.3

500 kHz	Flat	4	1.6 ∝sec	15	329	360.575

300 kHz	Gaussian	1	0.2667 ∝sec	90	1972	2163.1

300 kHz	Gaussian	4	1.07 ∝sec	22	492	539.16

Chapter 2

E4406A VSA specifications

The Agilent Technologies E4406A Vector Signal Analyzer (VSA) is a sophisticated instrument designed for the analysis of complex signals. This versatile device is widely used in various fields, including telecommunications, broadcasting, and aerospace, thanks to its high-performance capabilities and advanced features.

One of the standout characteristics of the E4406A is its ability to analyze digital modulation schemes. It supports a wide range of formats, including 2G, 3G, 4G, and emerging standards, providing a comprehensive tool for engineers and researchers working with modern communication systems. The VSA is particularly valued for its flexibility in signal analysis, allowing users to capture and demodulate signals in real-time.

The E4406A utilizes advanced measurement technologies that ensure precise signal analysis. With a frequency range from 50 kHz to 6 GHz, the VSA can handle various applications, making it a suitable choice for both R&D and production testing. The instrument employs digital signal processing techniques, enabling high-resolution measurements and exceptional dynamic range. This ensures accurate interpretation of signals, even in the presence of noise or interference.

Another significant feature of the E4406A is its user-friendly interface. The combination of a graphical display and intuitive controls allows users to visualize complex waveforms and spectra easily. The software capabilities of the E4406A further enhance its usability, providing various analysis options including error vector magnitude (EVM), adjacent channel power (ACP), and spectrum occupancy. These tools allow engineers to diagnose issues rapidly and efficiently optimize their designs.

The modularity of the E4406A is a key aspect of its design. Users can upgrade their instrument with various option packs and software for specific applications, making it adaptable to a variety of testing scenarios. This flexibility ensures that the VSA remains relevant as technology evolves and new standards emerge.

In conclusion, the Agilent E4406A Vector Signal Analyzer stands out due to its combination of advanced measurement capabilities, user-friendly interface, and adaptability. Its extensive feature set makes it an essential tool for professionals involved in the development and testing of modern communication systems. Whether for research, design validation, or quality control, the E4406A delivers high-performance signal analysis that meets the demands of today's fast-paced technology landscape.

Agilent Technologies E4406A VSA manual MEAN,25us,526us,579.6us,8

Models: E4406A VSA