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+ Wireless World ELECTRONICS Denmark DKr. 70.00 Germany DM 15.00 Greece Dra.760 Holland DFI. 14 Italy L. 7300 IR £3.30 Spain Pts. 780 WORLD Singapore SS 12.60 USA $6.70 + WIRELESS WORLD SOR DISTRIBUTION A REED BUSINESS PUBLICATION MARCH 1993 £1.95 APPLICATIONS Intelligent charging for f 4A 4 r NiCds B 7-1/8 RF DESIGN ATV receiver for 23cm SYSTEMS Radio circuitry for GPS systems SIGNAL PROCESSING Experimenting with DSP REVIEW Dadisp-the clumsy alternative ? IMF an Hickman's new hook READE na oguee for just £22.40* *Overseas f27.40..This month Normal price L 34.90 19.91.1) OFFER I 833004 THE WORLDS No.1 BEST SELLING UNIVERSAL PROGRAMMING AND TESTING SYSTEM. The PC82 Universal Programmer and Tester is a *More sold worldwide than any other of *Software supplied to write own test PC -based development tool designed to its type. vectors for custom ICs and ASICs etc. program and test more than 1500 ICs. The latest *UK users include BT, IBM, MOD, THORN *Protection circuitry to protect against version of the PC82 is based on the experience EMI, MOTOROLA, SANYO, RACAL wrong insertion of devices. gained after a 7 year production run of over *High quality Textool or Yamaichi zero 100,000 units. insertion force sockets. *Ground control circuitry using relay switching. *Rugged screened cabling. The PC82 is the US version of the Sunshine *High speed PC interface card designed *One model covers the widest range of Expro 60, and therefore can be offered at a very devices, at the lowest cost. competitive price for a product of such high for use with all PC models from XT to quality. The PC82 has undergone extensive 486. *No need to tie up a slow parallel port. testing and inspection by various major IC *Over 1500 different devices (including *Two year free software update. manufacturers and has won their professional more than 100 MPU's) supported. approval and support. Many do in fact use the *Tests and or identifies a wide range of Speedoptimisedrangeof PC82 for their own use! logic devices. programming algorithms. The PC82 can program E/EPROM, Serial PROM, BPROM, MPU, DSP, PLD, EPLD, PEEL, GAL, FPL, MACH, MAX, and many more. It comes with a 40 pin DIP socket capable of programming devices with 8 to 40 pins. Adding special adaptors, the PC82 can program devices up to 84 pins in DIP, PLCC, LCC, QFP, SOP and PGA packages. The unit can also test digital ICs such as the TTL 74/54 series, CMOS 40/45 series, DRAM (even SIMM/SIP modules) and SRAM. The PC82 can even check and identify unmarked devices. Customers can write their own test vectors to program non standard devices. Furthermore it can perform functional vector testing of PLDs using the JEDEC standard test vectors created by PLD compilers such as PALASM, OPALjr, ABLE, CUPL etc. or by the user. The PC82's hardware circuits are composed of 40 set pin -driver circuits each with TTL I/O control, NOW SUPPLIED WITH SPECIAL VALUE *NATIONAL SEMICONDUCTOR OPALjr D/A voltage output control, ground control, ADDED SOFTWARE (worth over £300 if PAL/PLD development software. noisefiltercircuitcontrol, and OSC crystal bought seperately): frequency control. The PC82 shares all the PC's *BATCH SOFTWARE for production resources such as CPU, memory, I/O hard disk, *MICROTEC disassemblers for Z8, 8085, programming. keyboard, display and power supply. 8048. 8051, 6809 & 68HC11 A dedicated plug in card with rugged connecting cable ensures fast transfer of data to the Our stocked range of own manufactured and programmer without tying up a standard parallel imported Sunshine products include: or serial port. Will work in all PC compatibles from PC XT to 486. *Super fast EPROM Erasers. * 1,4 & 8 gang EPROM 8Mbit production programmers. The pull -down menus of the software makes the * Battery operated portable EPROM PC82 one of the easiest and most user-friendly programmers. programmers available. A fulllibraryof file "In circuit" Emulators. conversion utilities is supplied as standard. *Handy pocket IC testers. The frequent software updates provided by Sunshine enables the customer to immediately ORDERING INFORMATION program newly released ICs.It even supports EPROMs to 16Mbit. PC82 complete with interface card, CP cable, software and manual only£395 Over 20 engineers are employed by Sunshine to CITADEL PRODUCTS LTD develop new software and hardware for the Please add £7 carriage (by overnight courier) for PC82. Not many competitors can boast of similar DEPT. WW, 50 HIGH ST., UK orders, £20 for export orders, and VAT where support! EDGWARE, MIDDX. HA8 7EP. applicable. Citadel, a 32 year old company are the UK agents ACCESS, MASTERCARD, VISA or CWO. Phone now on: 081 951 1848/9 and service centre for the Sunshine range of Official orders are welcome from Government programmers, testers and in circuit emulators bodies & local authorities. 1 and have a team of engineers trained to give VISA local support in Europe. Free demo disk with device list available. CONTENTS FEATURES MULTI -MEDIA - THE PERFECT MARRIAGE 224 COVER: STARTING OUT Is it a television? Is it a computer? Multimedia is blurring WITH DSP 188 the distinction. Julia King reports on progress to the all -in- To be considered competent, an one entertainment/information system.. electronic designer must be able to apply the basics of DSP. Jean - PICKING UP A CLEARER PICTURE Jacques Dauchot's experimenter's OF AMATEUR TV 227 kit allows anyone to try- and see. Amateur television is no longer just for the dedicated Cover: Kevin Clarkson enthusiast. John Cronk explains how widespread repeaters combined with off -air beacon signals and receiver designs DADISP REVISION WITH - such as his own - make amateur TV accessible to a much RESERVATIONS 198 wider audience. DADISP is one of the most flexible signal data processing packages on the market. But Allen Brown wonders if ! Version 3.0 had been better left in the box. ! S OFFER Analo ue Electronics by Ian Hickman GRAPHICAL DEMONSTRATION Save £1 2.50 OF SCIENTIFIC POWER 200 on the 300 page hardback edilon wit is issue of EW + WW If you want to convert your PC into a scientific calculator (see reader reply card betweer pp. 232-233) with powerful graphing at minimum cost, Don Bradbury shows why CC4 is the program to consider. ELECTRONICS AFLOAT 240 Greater GPS accuracy and a compact satellite voice GPS: RADIO ARCHITECTURE 210 telephone were among the electronic innovations unveiled Traditional GPS radio architectures require access to asic at this year's London boat show. technology for the hardware processing channels and suffer from long acquisition times. Philip Mattos describes OP AMPS IN PICTURES 244 a high performance radio system, based on direct Bryan Hart describes a graphical technique for describing conversion, and outlines Plessey's single chip GPS feedback amplifiers that reveals fundamental operating implementation. characteristics. REGULARS COMMENT 179 LETTERS 235 The nature of power Filter tips, Speed kills theory, Where is the low region?, Under the brolly, Some mac comeback, Happiness is an UPDATE 180 engineer, Particle poppycock, Rationalising peace, Beatles Government bans unbuggable phones, Virtual reality set to in the ground, Crash response. boldly go, DTI launches campaign to kill waves that kill, Trio plans to halve mmic costs, 40GHz GaAs line gives NEW PRODUCTS 247 UK lead in Europe. EW +WW's round up of all that's new in electronics and engineering software. RESEARCH NOTES 184 Sound reasons for short term memory, Every which way- APPLICATIONS 252 but not loose, Wired up head gasket reveals combustion Fast - and safe - charging of NiCds with DSP, Filtering picture, Making chips at home (all you need is an SEM), reference voltages, Programmed delays. Pushing back the limits on optic fibre comms. DESIGN BRIEF 258 CIRCUIT IDEAS 204 Negative characteristic components may not be called for Automatic monitor sync polarity, Programmable timer, LC every day, but Ian Hickman shows why they should be square -wave generator, Fast small -signal rectifier, regarded as a standard tool for the professional circuit Adjustable accurate stepper controller designer. IDENTIFYING AND AVOIDING TRANSISTOR PROBLEMS 218 In next month's issue: There is currently much Transistors - both bipolars and mosfets- are immune to interest n direct conversicn SSB radio systems many problems, but they can still give trouble. Robert because of their ease of in=egration onto silicon. Pease shows how robust design methods and proper N C Hamilton describes an SSB HF receiver assumptions about performance characteristics are the keys using quadrature direct conversion for use with to avoiding pit -falls. either analogue or DSP design techniques. APRIL ISSUE IS ON SALE MARCH 25 March1993 ELECTRONICS WORLD + WIRELESS WORLD 177 FROM CONCEP 0 ARTWORK IN 1 DAY Your d ideas are quickly captured using The ULTIcap schematic design Tool. ULTIcap uses REAL-ME checks to prevent logic errors. Schematic editing is painless: simply click your start and end oints d ULTIcap automatically wires them for you. ULTlcap's auto snap to pin and auto junction ensure your netlist is complete, thereby relieving you of tedious netlist checking. ULT:ctell. the integrated user interface, makes sure all design information is transferred correctly from ULTIcap to ULTlboard. Good manual placement tools are vital to the progress of your design. therefore ULTlboard gives you a powerful suite of REAL-TIME functions such as, FORCE VECTORS. RATS NEST RECONNECT and DENSITY HISTOGRAMS. Pin and gate swapping allows you to further optimise your layout. Now you can quickly route your critical tracks. ULTiboard's REAL-TIME DESIGN RULE CHECK MI nct allow you to make illegal connections or violate your design rules. ULTlboard's powerful TRACE SHOVE. and REROUTE -WHILE -MOVE algorithms guarantee that any manual track editing is flawless.
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