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MS269xA Signal Analyzer Series Function Upgrade

2012/3/6

Wideband Measurements for Satellite and Radar System Evaluations

MS269xA-box.jpg

MS269xA-077 Analysis Bandwidth Extension to 62.5MHz

MS269xA-078 Analysis Bandwidth  Extension to 125MHz

MS2692A-067 Microwave Preselector Bypass 

Anritsu Corporation (President Hirokazu Hashimoto) today announced the February 29 release of three hardware options for the company’s popular MS269xA Signal Analyzer series (MS2690A/MS2691A/MS2692A), with wideband*2 FFT*3 analysis functions for evaluating microwave*1 systems such as satellite and radar, as well as mobile communications systems. 

The MS269xA Signal Analyzer series is an ideal measurement solution for capturing wideband signals for analysis using FFT technology. 

The three released hardware options are the MS269xA-077  Analysis Bandwidth  Extension to 62.5MHz; the MS269xA-078  Analysis Bandwidth  Extension to 125MHz; and the MS2692A-067 Microwave Preselector Bypass (only for the MS2692A). 

Installing the MS269xA-077 in the MS269xA series expands the standard analysis bandwidth from 31.25 MHz*4 to 62.5 MHz, while adding the MS269xA-078, expands it even further to 125 MHz, enabling capture and quality analysis of wideband signals used by each microwave communication system up to 6 GHz*5

In addition, installing the MS2692A-067 option in the MS2692A bypasses the microwave preselector*6 limiting the MS2692A analysis bandwidth. Although frequencies up to 6 GHz have been supported previously when performing FFT analysis at bandwidths exceeding the 31.25-MHz limit of the MS2692A, now installing the MS2692A-067 in addition to the MS269xA-077/078 removes the analysis bandwidth limit at frequencies above 6 GHz, permitting signal analysis at bandwidths of 62.5/125 MHz for microwave systems up to 26.5 GHz.

These upgrades will show their real potential with the roll-out of next-generation LTE Advanced*7 mobile communications systems expected to use the 40-MHz band at service start and building out to the 100-MHz band in the future when the MS269xA series with these new wideband measurement options will lead the field in LTE Advanced evaluation and measurement. 

The MS269xA Signal Analyzer series support analysis of transient phenomena that are hard to capture using sweep-type*8 spectrum analyzers. By building-out its wideband measurement options for the MS269xA series, Anritsu intends to be the world leader in quality analysis solutions for microwave and next-generation mobile systems.

[Development Background]

Microwave communications systems such as satellite and  earth stations*9, meteorological radar, and mobile communications systems, etc., are seeing increases in both frequency and bandwidth due to the need to handle increasingly larger data amounts. Since frequency bands with upper and lower limits are allocated to these communications systems, the measurement instruments used for evaluation must support selection of the analysis bandwidth and corresponding frequency. 

The lineup of three MS269xA Signal Analyzer models covers frequencies up to 6 GHz (MS2690A); 13.5 GHz (MS2691A); and 26.5 GHz (MS2692A). This release completes the analysis bandwidth options. The previous MS269x-004 125 MHz expansion option has been succeeded by the MS269xA-077 62.5 MHz and the MS269xA-078 125 MHz expansion options. As a result, both 62.5 and 125 MHz can be selected in addition to the standard 31.25 MHz analysis bandwidth for the MS269xA series.

Moreover, the MS2692A now supports wideband measurements of high-frequency microwave communications systems with release of the MS2692A-067 Microwave Preselector Bypass, which performs 125-MHz wideband analysis of 20-GHz band, high-frequency microwave systems up to a top frequency of 26.5 GHz.

[Product Outline]

The MS269xA-077/078 analysis bandwidth  extension to 62.5 MHz/125 MHz options are hardware options for installing in the MS269xA series of signal analyzers to expand the analysis bandwidth from 31.25 MHz to either 62.5 or 125 MHz. They supersede the performance of the older MS269xA-004 with better ADC*10, display average noise level*11 and dynamic range*12, providing higher-accuracy analysis. 

Additionally, the MS2692A-067 Microwave Preselector Bypass is a dedicated hardware option only for the MS2692A Signal Analyzer. Adding it to the MS2692A with an analysis bandwidth expansion option supports wideband FFT analysis measurements in the 62.5/125 MHz bands at frequencies up to 26.5 GHz. 

[Product Features]

■ Select Analysis Bandwidth Matching Application

The MS269xA series of signal analyzers has been expandable up to the 125 MHz analysis bandwidth using the older MS269xA-004 option, but now adding the MS269xA-077 expands the intermediate model range to 62.5 MHz. Consequently, in addition to the standard 31.25 MHz analysis bandwidth, either 62.5 MHz or 125 MHz can be selected to match the evaluation analysis bandwidth exactly to the application. 

■ Support Max. 125 MHz Wideband Measurement up to 26.5 GHz

Previously, when using the MS2692A to make wideband measurements above 31.25 MHz, the supported higher frequency limit was 6 GHz. However, with these MS2692A-067/077/078 options installed in the MS2692A, wideband FFT analysis can be performed at an analysis bandwidth of 125 MHz at frequencies up to 26.5 GHz. 

■ Support LTE Advanced Analysis Bandwidth Measurements

The next-generation high-speed LTE Advanced mobile communications system is planned to enter service first at 40 MHz and then at 100 MHz in the future. These new 62.5 MHz and 125 MHz analysis bandwidth options help support LTE Advance R&D and future service build out.

MS269xA Signal Analyzer Series 

The MS269xA series is a line of signal analyzers offering excellent total level accuracy*13 and modulation*14 accuracy for wideband signal analysis. They have a vector signal analysis function supporting FFT analysis, a built-in digitizer function for capturing signal waveforms as digital data, and support signal quality analyses from various perspectives, including the time and frequency domains. In addition, as well as being able to read saved data and perform the necessary analyses, they can also perform modulation and simulations in coordination with third-party commercial tools. Unlike sweep-type spectrum analyzers, they can perform analysis of frequency hopping*15 and other unexpected phenomenon like phase*16 drift as well as transients such as short-term spectrum*17 degradation and noise, supporting use as general-purpose measuring instruments for various microwave and mobile communications systems. 

Moreover, adding a vector signal generator option enables an all-in-one MS269xA to support all TRx characteristics evaluations required by both R&D sections and factory production lines seeking higher throughput and yields. 

The three models in the MS269xA series support different maximum frequencies matching the application: the MS2690A (supports 6 GHz), the MS2691A (13.5 GHz), and the MS2692A (26.5 GHz).

 [Target Markets and Applications]

■ Target Markets: Makers of wireless communications equipment

■ Applications: Satellite and  earth station systems, R&D and manufacturing of various microwave systems, such as radar, R&D of next-generation mobile communications systems. 

[Terminology]

*1 Microwave

Part of electromagnetic spectrum used by wireless communications systems, satellite communications, radar, TV broadcasting, etc., with each allocated part of frequency bandwidth

 *2 Wideband

Wide frequency amplitude range (width between highest and lowest frequencies); large amounts of data can be transferred at one time with wider bandwidths

*3 FFT: Fast Fourier Transform

High-speed Fourier transformation for extracting frequency components included in signal; Using FFT, signals can be captured without lost parts to analyze the changes over time in the DUT signal spectrum, frequency, power, and phase. This can be used to analyze transient phenomena that cannot be captured using conventional sweep-type spectrum analyzers.

*4 MHz (megahertz)

Unit of frequency; means 1 million (106) oscillations per second 

*5 GHz (gigahertz)

Unit of frequency; means 1 billion (109) oscillations per second 

*6 Microwave preselector

Part used in both spectrum and signal analyzers to filter out unwanted signal components in higher frequency bands; it can be a cause of degraded measuring instrument level accuracy and modulation accuracy due to extreme difficulties in stabilizing the amplitude and frequency characteristics. In addition, the analysis bandwidth is also limited by the preselector pass frequency range

*7 LTE Advanced

Next-generation higher-speed extension of current Long term Evolution (LTE) communication technology being rolled out worldwide intending to offer maximum data transfer speeds of 1 Gbps when stationary/moving at slow speeds and 100 Mbps when moving at high speeds  

*8 Sweep

Internal operation of spectrum analyzer when measuring signal; the continuous updating of the on-screen measurement results from left to right is called “sweeping.” 

*9  Earth Station

Wireless station on the earth’s surface or in the atmosphere for managing satellite communications and satellite broadcasts by relaying wireless communications from space station such as artificial broadcast satellites 

*10 ADC: Analog to Digital Converter

Circuit for converting analog signals to digital signals 

*11 Display Average Noise Level

Average value of noise generated in measuring instrument and used as index of spectrum analyzer performance; it is the lower limit of measurable input signals 

*12 Dynamic Range

Measurement range unaffected by each type of jitter 

*13 Total Level Accuracy

Overall performance of spectrum or signal analyzer including all causes of measurement error 

*14 Modulation

Process by which wireless communications systems first convert data to be sent into electrical signals and then impose them on radio carrier wave for transmission 

*15 Frequency Hopping

Method of changing signal frequency at extremely short time intervals and one spread spectrum method used by wireless communications systems 

*16 Phase

Cyclical phenomenon expressing position in cycle units; angle expressed in degrees or radian units 

*17 Spectrum

Method for visualizing electrical signal characteristics in frequency domain; the so-called frequency spectrum separates the signal into each frequency component and graphically displays each frequency on the x-axis and the change in amplitude (level) of each frequency on the y-axis.

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