MCS Test Equipment Ltd are the UK distributors for Willtek, Tescom, Schomandl and Litepoint. We offer a wide range of leading edge test equipment products to meet the testing requirements of most wireless and Broadcast standards such as GSM, WCDMA, TETRA, WLAN 802.11, Bluetooth and WiMax 802.16. As well as offering test equipment sales, MCS also has a wide range of rental test equipment and used test equipment available.We provide high quality used test equipment for sale or rental and tailor our services to meet your individual needs.
An extra feature available on some analogue scopes is called 'storage'. This feature allows the trace pattern that normally decays in a fraction of a second to remain on the screen for several minutes or longer. An electrical circuit can then be deliberately activated to store and erase the trace on the screen.
The storage is accomplished using the principle of secondary emission. When the ordinary writing electron beam passes a point on the phosphor surface, not only does it momentarily cause the phosphor to illuminate, but the kinetic energy of the electron beam knocks other electrons loose from the phosphor surface. This can leave a net positive charge. Storage oscilloscopes then provide one or more secondary electron guns (called the "flood guns") that provide a steady flood of low-energy electrons traveling towards the phosphor screen. The electrons from the flood guns are more strongly drawn to the areas of the phosphor screen where the writing gun has left a net positive charge; in this way, the electrons from the flood guns re-illuminate the phosphor in these positively-charged areas of the phosphor screen.
If the energy of the flood gun electrons is properly balanced, each impinging flood gun electron knocks out one secondary electron from the phosphor screen, thus preserving the net positive charge in the illuminated areas of the phosphor screen. In this way, the image originally written by the writing gun can be maintained for a long time. Eventually, small imbalances in the secondary emission ratio cause the entire screen to "fade positive" (light up) or cause the originally-written trace to "fade negative" (extinguish). It is these imbalances that limit the ultimate storage time possible.
Some oscilloscopes used a strictly binary (on/off) form of storage known as "bistable storage". Others permitted a constant series of short, incomplete erasure cycles which created the impression of a phosphor with "variable persistence". Certain oscilloscopes also allowed the partial or complete shutdown of the flood guns, allowing the preservation (albeit invisibly) of the latent stored image for later viewing. (Fading positive or fading negative only occurs when the flood guns are "on"; with the flood guns off, only leakage of the charges on the phosphor screen degrades the stored image.)
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We have over 2,000 pieces of new and used test equipment to choose from. If we haven’t got it in stock, we’ll try our very best to source it for you.
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Test Equipment Products
We are constantly updating our database of test equipment products, click on any of the following manufacturers to browse our latest items:
Acterna/JDSU, Adret, Advantest, Agilent - HP, AH Systems, Amplifier Research, Ando, Anritsu, AOIP, Audio Precision, Austrian Research, Bird, BMI, Boonton, Bruel & Kjaer, California Instruments, CEM, Chauvin Arnoux, Chroma, Climats, Convergie, Divers, Dranetz, Druck, EA, Efratom, EIN, EIP, ELC, Elgar, EM Test, EMCO, Enertec, Exfo, Flir, Fluke, FUG, Fujikura, Furukawa, GE Programma, Gigatronics, GMC, Goerz, Gould Nicolet, Hameg, Hioki, IFR-Aeroflex, Instek, Intec, Itech, Itronix, Kalmus, Keithley, Kepco, Kikusui, Kimo, Kyoritsu, Lambda, LECroy, LEM, Litepoint, Marconi, Mastech, MCP, Metrix, Microlab, Microtest, Milmega, Multimetrix, Narda, NetTest, Niton, Noisecom, Ophir, Panasonic, Philips, PMM, Powerbox, Prolabo, Promax, Protek, Racal, Raytek, Rigol, Rohde & Schwarz, Rotronic, Sample Instruments, Schaffner, Schlumberger, Schomandl, Secasi, Sefelec, Sefram, Solartron, Sony, Sorenson, Spinner, Stanford Research, Sunrise telecom, Svantek, Systron Donner, Tabor, Teac, Tegam, Tektronix, Tescom, Testo, Thomson, Toellner, Trend , TRT, TTI, USB Instruments, Varian, Veriwave, Voltech, Voltsch, Votsch, W/G Acterna, Wavetek, Western Graphtec, Willtek, Xantrex, Yokogawa,
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