Blogging Affairs Desk

What Is A Spectrum Analyzer And How Does It Work?

A spectrum analyzer is a type of electronic test equipment which measures an electrical, optical or audio waveform. A spectrum analyzer displays the frequency response curve as it occurs in real time. It can also measure the power spectrum when used with an antenna which has been properly calibrated. 

There are two types of spectrum analyzers, analog and digital. The analog variety breaks down into two further sub-types. One type works by the means of a variable band-pass filter whose mid-frequency is swept through the range of frequencies to measure in the spectrum. The other type uses a superheterodyne receiver where an oscillator is swept through the range of frequencies to be measured. A digital spectrum analyzer works by computing the discrete Fourier transform (DFT). The DFT is a mathematical formula which transforms a waveform into the components of its frequency spectrum. Due to the superiority of digital technology, a digital analyzer will always outperform an analog analyzer in frequency resolution for a given acquisition time.

Some spectrum analyzers use a method of measurement which combines both the analog and digital methods. In this type of analyzer the incoming signal is down-converted to a lower frequency using superheterodyne techniques and then analyzed using fast fourier transformation (FFT) techniques.

Spectrum analysis equipment, especially optical spectrum analyzers, are widely used in the telecommunications industry to determine occupied network bandwidth. This type of test equipment is also used extensively in the audio industry. One such use is in room conditioning for high end stereo and home theater installs. A spectrum analyzer can pinpoint frequencies to cut or boost to compensate for room conditions thus leading to a more accurate representation of the source audio material. For many reasons they’re an indispensable tool in ensuring the accuracy of network communications and audio systems.

About the Author

Visit Fiber Optic Tool Supply to find new and used optical spectrum analyzers, optical loss test sets and other fiber optic equipment at discount closeout prices.

Digital Spectrum MF8104

ATTEN AT6030D 3.02Ghz Digital Spectrum Analyzer with 6.4″ Color TFT LCD $6,399.00

Western Multiplex WM Lynx 6 Spread Spectrum Digital Microwave Radio $9.99

SVP HDDV-2200 IR INFRARED AND FULL SPECTRUM DIGITAL CAMCORDER NEW !!!!!!!!!!!!! $132.00

CLEARSTREAM4 C4 HDTV HIGH DEFINITION DIGITAL TV ANTENNA UHF DTV CHANNEL SPECTRUM $114.99

Technicall Pro® Professional Equalizer With Digital Spectrum, Brand New, $110.00

PB Martin Thomas: Beyond the Spectrum: Digit 293000 $11.35

PB Martin Thomas: Beyond the Spectrum: Digit 560589 $14.34

Lowepro Spectrum 30 Digital Camera Case Cover (LP35223) $9.03

Digital Spectrum MV-1041, 10.4in TFT Photo Frame #U50132 $84.95

HP App Note 140-4: Digital Auto-Power Spectrum Meas. $19.99

Sencore PSA 1455, Digital signal meter – Portable Spectrum Analyzer 5-870MHz $175.00

Digital Spectrum MF-8104 10.4″ Digital Picture Frame – DOES NOT WORK $5.00

Western Multiplex WM Lynx 6 Spread Spectrum Digital Microwave Radio $9.99

DIGITAL SATELLITE SIGNAL METER W/ SPECTRUM CAMERA & TV $710.40

Digital Spectrum NuVue 5.6 inch Digital Picture frame with Accessories $24.00

Spectrum EZ Command Control System Digital 5 Amp Power Booster 44910 $148.52

Western Multiplex Lynx CP2 27000-A1 Digital Radio Spread Spectrum Microwave T1 $169.99

Digital Spectrum DigiSign DS-1040 Digital Signage $287.74

Spectrum II DS3 DS1 IDU Modem Digital Microwave $489.00

TECHNICAL PRO® PROFESSIONAL EQUALIZER WITH DIGITAL SPECTRUM $125.95

Promaster Spectrum 7 28-70mm f3.5-4.5 AF Zoom Lens for Nikon Digital SLR Cameras $29.99

Proxim Tsunami 2xT1 – 2.4 Ghz Spectrum Digital Radio 31190-41A20 $29.99

SATLINK WS6912 DVB-S2 Digital Satellite Meter & Real Time Spectrum Analyzer $315.00

Factory wholesale WS6902 Digital Satellite Finder Meter & Spectrum Analyzer. $222.00

Satlink WS-6902 DVB-S Digital Satellite Finder Meter Spectrum $219.99

Lowepro DIGITAL CAMERA BAG Spectrum 10 Brand New $9.95

New Atten Digital Spectrum Analyzer 1050MHz AT6010 $939.99

Spectrum EZ Command Control System Digital Dynamis Handset 36507 $24.16

5V AC power adapter Digital Spectrum Solutions U-50131 $9.99

5V AC adapter Digital Spectrum EL-101 picture frame $9.99

DIGITAL SATELLITE SIGNAL METER WITH SPECTRUM CAMERA&TV $697.34

S7 12MP IR INFRARED AND FULL SPECTRUM DIGITAL CAMERA WITH NIGHTSHOT NEW!!!!!!!!! $139.00

Pioneer DEQ-7600 Digital Equalizer Processor DEQ7600 EQ Spectrum $175.00

Spectrum Analyzer Satellite Signal Finder Meter Digital TV Box Receiver System $260.99

Satlink WS-6902 Digital Satellite Finder Meter Spectrum $225.00

Satlink WS-6902 Digital Satellite Finder Meter Spectrum $225.00

Digital Spectrum NV-700 7″ Digital Picture Frame $9.99

Promaster Spectrum 7 80A 52mm Digital Camera Lens Filter Vintage $1.95

Technical Pro EQ-B7151 20-Band Digital Spectrum Professional Equalizer $134.99

Technical Pro EQ-B5151 Dual 10-Band Digital Spectrum Professional Equalizer $99.99

DMC Spectrum II 1RU IDU 151-141641-008 Rev 1F 8E1 BNC Digital Microwave Corp $49.99

DMC Spectrum II 4RU PIU 131-141652-003 Rev 1C 16E1 Digital Microwave Corp $59.99

Spectrum NuVue NV-561 Digital Photo Frame NOT WORKING $9.97

5.1MP 8x Zoom HD IR INFRARED AND FULL SPECTRUM DIGITAL CAMERA NEW !!!!! $49.00

Spectrum AIL 602 Digital Drum with Drum Stand $149.99

2 x DIGITAL MICROWAVE Spectrum II 16XE1 IDU + FAN UNIT $220.00

O3562-66501 RVE B / Digital Source board for HP 3562A Spectrum Analyzer $124.99

TECHNICAL PRO® PROFESSIONAL EQUALIZER DIGITAL SPECTRUM $94.80

TECHNICAL PRO® PROFESSIONAL EQUALIZER DIGITAL SPECTRUM $118.80

Digital Spectrum Digital Picture Frame NuVue 560 $30.00

Picnic Plus Savoy Insulated Lunch Tote Savoy Lunch Tote…

Picnic Plus 5 Piece Deluxe BBQ Set Superior quality stainless steel tools in a aluminum storage case…

Perkins Designs Potpourri – Equation 2 a spectrum of colors adorn this triangular space portal digital artwork – Mugs Equation 2 a spectrum of colors adorn this triangular space portal digital artwork Mug is new. Why drink coffee out of an ordinary mug when an imprinted mug is so much cooler? Microwave safe, FDA approved. Image is printed on both sides of the mug. Dishwasher use is not recommended….

Divergent Spectrum $8.99 …

Ten Collector’s Edition (2CD/1DVD/4vinyl/1 Cassette/Memorabilia) $98.68 Ten, the debut album that sold 12 million copies and introduced the world to Pearl Jam in 1991, will be reissued in four (4) new and expanded editions on March 24, 2009. The reissue of Ten serves as the launch of a planned two-year catalogue re-release campaign leading up to the band’s 20th anniversary in 2011. Each Ten package will include two versions of the album: the remastered version of the…

Spectrum of the Sky $8.99 …

Full Spectrum Light Bulb – ALZO 27W Compact Fluorescent – Case of 4 – Daylight Balanced 5500K – Pure White Light $25.06 Case of 4 full spectrum light bulbs that imitate daylight, are energy star compliant, and have a long life at circa 10,000 hours with 1300 Lumens output; low energy consumption, good for treating Seasonal Affective Disorder S.A.D., for photo studio lights, or for starting plant growth. These are Compact Fluorescent Light (CFL) bulbs. Fits all medium-base E27/E26 sockets, but this is a large bulb t…

ALZO Digital Full Spectrum Light Bulb – ALZO 45W Photo CFL 5500K 91 CRI, Daylight balanced, pure white light, 2800 Lumens, Case of 4 $35.10 Case of 4 full spectrum light bulbs for daylight balanced lighting, energy star compliant, long-lasting at cir. 10,000 hours with 2800 Lumens output; low energy consumption, good for treating S.A.D. (Seasonal Affective Disorder), photo studio lights, or starting plant growth. These are Compact Fluorescent Light (CFL) bulbs. Fits all medium-base E27/E26 sockets, but this is a large bulb that might …

Professional UV Inspection Flashlight 380-385nm – 16 Ultraviolet LED $17.95 Engineered for effectiveness and reliability to serve law enforcement, security personnel, professional inspectors and exterminators – with dozens of uses around home, too. Ultraviolet light causes many organic substances like pet stains or blood to fluoresce (glow) so they’re easy to spot (you’ve probably seen a similar light used on TV shows like ‘CSI’). High-efficiency LED extend battery life u…

Off the Hook-Fashion Secrets For All Ages, Shapes, and Sizes $34.95 Product Description: Losing weight? This newly released self help DVD teaches you to develop new approaches to designing your “new look” while pounds melt away! Develop…

Digital Spectrum U-50153 Digital Frame $35.99 2 lb 5.6″ 90 Limited Black Card Reader CompactFlash (CF) Card Desktop Digital Frame Digital Spectrum Digital Spectrum Solutions, Inc JPEG LCD Memory Stick MultiMediaCard (MMC) NuVue NuVue U-50153 Digital Photo Frame Secure Digital (SD) Card Slideshow U-50153 www.dsicentral.com xD-Picture Card

Digital Spectrum Solutions / 10.4" Digital Signage / DS-1040 $298.26 Digital Spectrum Solutions – 10.4" Digital Signage – DS-1040

Across the Spectrum – Book $16.64 Evangelical thinkers in recent years have thrust differing and sometimes nontraditional views on the doctrine of God, the composition of the human person, and the nature of hell into the spotlight. Across the Spectrum, written by Bethel College theologians Gregory Boyd and Paul Eddy, offers a service to the church by carefully examining the various positions taken by evangelical scholars on eighteen seminal issues—both classic concerns and those of more contemporary interests. Rather than taking sides, however, the authors give readers the resources they need to make up their own minds.

Enhancing Communication in Children With Autism Spectrum Disorders – Book $9.99 Enhancing Communication in Children With Autism Spectrum Disorders presents an overview of impairments in communication among children with an ASD.

Spectrum: $12.23 Spectrum

Spectrum $12.52 Spectrum

Diagnosis and Treatment of Children With Autism Spectrum Disorders – Book $9.99 This new series offers timesaving books on critical topics for educating students with autism spectrum disorders. The four books in this series are filled with practical information and advice, thus making them an ideal resource for classroom teachers, preservice teachers, and graduate students.This book provides an overview of the screening procedures and diagnostic criteria for students with autism spectrum disorders. The most current, research-based treatment therapies for students with this diagnosis also are presented.

Educational Strategies for Children With Autism Spectrum Disorders – Book $9.99 This new series offers timesaving books on critical topics for educating students with autism spectrum disorders. The four books in this series are filled with practical information and advice, thus making them an ideal resource for classroom teachers, pre-service teachers, and graduate students.Focusing on educational and instructional strategies that are successful with students with autism spectrum disorders, this book profiles the most current, research-based interventions that can be implemented by teachers in a classroom setting.

Finding Your Child’s Way on the Autism Spectrum – Book $9.99 It seems that nearly everyone knows a family with an autism spectrum child. Most recent figures suggest that the prevalence of all autism spectrum disorders in the United States is an astonishing 1% of the population in the United States, translating to twelve million parents and grandparents that are seeking answers. There are many books available on how to cure an autistic preschooler, but none on how to raise one to adulthood. These promised cures raise parents’ hopes, but most parents will find that they are dealing with a lifelong challenge no matter what they do. Dr. Laura Hendrickson is

900MHz All Weather Digital Spread Spectrum Data RX Only $1025 900MHz All Weather Digital Spread Spectrum Data RX Only

900MHz All Weather Digital Spread Spectrum Data TX Only $1200 900MHz All Weather Digital Spread Spectrum Data TX Only

Digital Spectrum MemoryFrame MF-801 Digital Photo Frame $67.99 1 Year Limited 1.50″ 1.55 lb 10″ 110 V AC 220 V AC 5 V DC 512 MB 8″ 8.4″ 800 x 600 MemoryFrame MF-801 Digital Photo Frame 1 x Adjustable Chrome Stand 1 x AC Adapter 1 x Remote Control 2 x Faceplates 1 x Frame Mounting Kit Quick Start Guide 1 x Wood Frame Play Slideshow Calendar/Clock Aspect Ratio: 4:3 New Ultra-Thin Euro Design frame has 512 MB Internal Memory, Interchangeable magnetic faceplates and an Espresso Wood Frame.The new ultra-thin design sports a brilliant high resolution screen that is ideal for keeping memories alive by showcasing your photos in an automatic slideshow giving cherished memories new life. BMP Cable Card Reader Desktop Digital Frame Digital Spectrum Digital Spectrum Solutions, Inc JPEG LCD MF-801 MPEG Memory Stick MemoryFrame MemoryFrame MF-801 Digital Photo Frame MultiMediaCard (MMC) Secure Digital (SD) Card Speaker U-50131 WMA Wall-mountable Yes www.dsicentral.com xD-Picture Card

How free is the radio spectrum $199 New technologies provide new opportunities for radio spectrum allocation and frequency use. This e-book covers areas such as spectrum trading, secondary use of spectrum, spectrum becoming available through digital TV, license-exepmt use and the related issues of welfare maximisation and international co-ordination.

Technical Pro eqs5150 Professional Equalizer with Digital Spectrum $141.7 Inputs: RCA(4 audio sources). Outputs: RCA (rec main). Frequency response: 32Hz16kHz. Removable rackmount brackets. Dual 10 band equalizer with individual LED indicators. Continuous demo mode with digital graphic spectrum.

Digital Spectrum NuVue NV-560 Digital Frame Photo Viewer – 5.6 Active Matrix TFT Color LCD $32.2 Digital Spectrum NuVue NV-560 Digital Frame Photo Viewer – 5.6″ Active Matrix TFT Color LCD

Digital Spectrum MemoryFrame MF-8115 Wireless Digital Picture Frame $277.99 1 Year Limited 1024 x 768 110 V AC 12 V DC 13″ 15″ 15.62″ 2.50″ 5.50 lb MemoryFrame MF-8115 Wireless Digital Picture Frame Built-in Table Stand AC Adapter Remote Control Black Wood Frame USB XD Card Reader Quick Start Guide The MF-8115 Wireless Digital Picture Frame from Digital Spectrum Solutions provides much more than a great way to display your pictures, watch movies and listen to music. The MF-8115 includes embedded Wi-Fi connectivity allowing you to connect the frame to your wireless network to receive images, news, sports scores, weather, financial updates and much more via the web. BMP Card Reader CompactFlash (CF) Card Digital Frame Digital Spectrum Digital Spectrum Solutions, Inc JPEG LCD MF-8115 MP3 MPEG-4 MemoryFrame MemoryFrame MF-8115 Wireless Digital Picture Frame MultiMediaCard (MMC) PNG Secure Digital (SD) Card Speaker TIFF U-40118 USB 2.0 WMA WMV Wireless Yes www.dsicentral.com xD-Picture Card

Full Spectrum Diplomacy and Grand Strategy: Reforming the Structure and Culture of U.S. Foreign Policy – Book $29.95 Full Spectrum Diplomacy and Grand Strategy: Reforming the Structure and Culture of U.S. Foreign Policy, by John Lenczowski, offers a solution to one of the greatest weaknesses in U.S. foreign policy that has exacerbated the unprecedented anti-Americanism of recent years—the U.S. Government’s inability to conduct the full spectrum of diplomatic arts and to integrate them with the other arts of statecraft at the level of grand strategy. The analysis presents a critique of how the Department of State’s focus on traditional, government-to-government diplomacy comes at the expense of public diplo

Digital Spectrum MemoryVue MV-1700 Plus Digital Photo Frame $275.99 1 Year Limited 10.60 lb 1280 x 1024 16.25″ 17″ 19.25″ 2.75″ 256 MB MemoryVue MV-1700 Plus Digital Photo Frame AC power adapter Desktop Stand Remote Control USB Cable User Manual The MV-1700 Plus accepts CF/SD/XD/MMC/MS cards for maximum compatibility with major digital cameras. A great companion to your digital camera or camcorder and an excellent way of showing off your pictures and clips to family and friends. An easy to use on screen menu is used to access the different control functions, giving you full control of the slide show and player functions. Black Cable Card Reader CompactFlash (CF) Card Desktop Digital Frame Digital Spectrum Digital Spectrum Solutions, Inc JPEG LCD MP3 MPEG-1 MPEG-2 MPEG-4 MV-1700 Memory Stick Memory Stick PRO MemoryVue MemoryVue MV-1700 Plus Digital Photo Frame MultiMediaCard (MMC) Secure Digital (SD) Card Speaker U-40130 Yes www.dsicentral.com

900MHz All Weather Digital Spread Spectrum Data TX & RX, Up to 12 Miles $1700 900MHz All Weather Digital Spread Spectrum Data TX & RX, Up to 12 Miles

Stratex Networks Velox LE 5810 651-03806 Spread Spectrum Digital Radio Link LE5810 $1490.55 Stratex Networks Velox LE 5810 651-03806 Spread Spectrum Digital Radio Link LE5810