
- •29 Word study Verbs and related nouns
- •34 Language study Describing a process
- •3 6 Writing Describing a process
- •Tuning-in
- •66 Writing 2 Ordering components
- •74 Tuning-in
- •81 Listening
- •82 Language study Would
- •In the future, electronics are likely to become even more common in the home as multimedia entertainment systems and computer-controlled robots are developed.
- •Rf carrier
- •Introduction to Electronic Systems
- •16 Weeks X 2 VI hours
- •When is the lunch break?
- •10 These tolerances may seem to reflect poor manufacture but in most circuits they are, in fact, quite satisfactory. Relaxing the tolerance enables the makerto sell them more cheaply.
- •X varactor diode
- •Identify each of the following diodes:
- •10 The first stage consists of a transformer which steps down the voltage of the ac mains (see Fig. 2).
- •Smoothed dc input
- •15 Common is reverb (reverberation) which can make the music sound as if it was recorded in a very large building or a very small room.
- •Making a recording Places People Equipment
- •4 How is mixing down like developing and printing a photograph?
- •In this text which are additional to those given on the tape.
- •3 You must always keep an eye on the recording level.
- •1 A photodiode picks up rays from the remote control.
- •Ir diode
- •2 How many detection devices does it show? Name them.
- •4 If a burglar walks in front of a motion sensor,
- •7 A magnet on the moving part trips a switch if
- •Sensing device Used to detect
- •9V battery
- •In a frequency-modulated (fm) wave, the audio signal is combined with the rf carrier wave to vary the frequency of the carrier (see Fig. 2).
- •Af power amplifier
- •Via di Pietra Papa 00146 Roma
- •25 Die away naturally. As it dies, the current in the object reactivates the search coil. This voltage is then amplified to indicate with a sound or a flashing light that an object has been found.
- •4 The magnetic field a voltage in the search coil.
- •5 Noise is also by the low-frequency mains supply.
- •In left
- •In right о г
- •Interviewer: a test engineer. What would that involve?
- •I Is there any other kind of work you! enjoy?
- •15 Instead of recording the sound waves continuously, a drum з
- •4 These are converted to electrical signals by (use) a microphone.
- •15 Vinyl records are eliminated such as 'crackle' caused by dust and static, and 'jumping', due to scratches on the recording surface.
- •8 What might be the effect of so many people having cd players?
- •1 Unlike lPs, cDs use a digital recording system.
- •7 The electron gun in a crt a stream of electrons.
- •20 With an oscilloscope so that a visual display of the waveform can be seen.
- •45 Electrons.
- •Video cassette recorder
- •Italics from the text below. One has been done for you.
- •Vhs video-recorder mechanism
- •15 The number of iCs used in a computer, I.E. The chip count, can be reduced by connecting nand gates together to form other types of gates (see Fig. 3).
- •Integration as shown in Table 1. The 1с shown in Fig. 2 is an ssi 20 device but microprocessors used in computers are vlsi or slsi devices.
- •Input impedance low high
- •Instead of using the complicated springs, cogs, and wheels of a mechanical watch, the digital watch uses a vibrating crystal to keep time. It is accurate to one second in 10 years.
- •Vibrating crystal
- •15 Each one-second pulse triggers the microchip to send signals to the digital display to advance the numerals by one second.
- •Xdiaphragm
- •65 System.
- •1 Engineers developed optical fibre cables in the 1980s.
- •2 What is the purpose of the dielectric material in coaxial cable?
- •Insulator (e.G. Polyethylene) sheath
- •Insulator (e.G. Polyethylene) covering wire
- •25 Microwaves can be guided along rectangular copper ducts by a series of reflections from the inner walls (see Fig. 4).
- •If you make a mistake when keying in a number and you want to delete the last digit:
- •If you hold down clr,the whole numberwill be deleted and the p3 will go back to standby.
- •3 What is the difference between a mobile phone and a cellphone?
- •20 Telephone calls at the same time. To achieve this, each
- •30 Compromise between the number of frequency channels available in each cell and the interference between communications in different cells.
- •40 Calls from other cellphones and fixed telephones throughout the whole telephone system (see Fig. 2).
- •50 Call, the 8kHz signal is discontinued and the speech channel is enabled.
- •8 The signal indicates a suitable frequency channel for the call.
- •5 Converts the binary data into digital information (lines 21-22)
- •International international
- •40 As ordering goods and controlling bank accounts.
- •1 Avionics
- •2 Computing
- •3 Defence
- •1991-Present
- •1990-1991 Summer 1989
- •1 A technician with experience in servicing hospital equipment.
- •4900 University Avenue
- •If you would like to hear about outstanding opportunities in Europe to work in the expanding area of personal communication systems, write to:
- •If you can fill one of these vacancies, contact us at once.
- •I'm interested. I have the following training/ experience:
- •If a target is hit. .
- •Input signal
- •1 Manufacturing
- •2 Planning
- •3 Installation
- •4 Commissioning
- •If a target is hit. .
- •5 Maintenance
- •6 Sales
- •8 Research and Development
- •30 Large companies run their own r&d departments. Exciting
- •Induced in an inductor in opposition to the
- •Video image of the internal organs of a
- •2 [13] One side (left or right) of a stereo
- •In one unit and sharing a common
- •Voltage produced by an electrical source
- •241 Solid cylinder of metal oxide insulating
- •Video picture flip-flop /'flip йар/ [24] digital electronic
- •Instrument used for detecting pulses and
- •1 Or 0, high or low) long wave /'log weiv/ [10] range of radio
- •Voltage ac electricity supply maintain /mem'tem/ [22, 29] keep in good
- •Integrated circuit on one piece of silicon microcomputer/,maikraukam'pju:ta(r)/
- •Instrument for measuring various electrical quantities including voltage, current and resistance
- •Inputs are high natural frequency /.Naetjaral 'fri:kwansi/
- •Voltage ionizes the neon gas inside network /'netw3:k/ [26] system of
- •Interconnected devices network manager /,netw3:k 'тгепк1зэ(г)/
- •Interconnected telephone lines for use by
- •In a public telephone network which
- •Voltage which causes a component to pass
- •Various signals used in the test and
- •Integration: between 104 and 10s active
- •Voltage level from varying stable /'steibl/ [24] in a balanced state stage /steid3/ [5] circuit block: section of
- •In a circuit suppress /sa'pres/ [18] prevent a signal
- •Iks,tjemd3/ [28] switching centre for
- •Video signal teletype terminal /'telitaip ,t3:minal/ [28]
- •Images over long distances television receiver Ле1шзп n,si:v9(r)/
- •Isolating an ac supply voltage transistor /traen'zistsir)/ [1]
- •28] Cable or duct for guiding signals
- •Variable capacitor or resistor for making
- •V/VI:/[4, 11] volt
- •Vacuum tube /'vaekjuim tju:b/ [1 ]
- •Vdu /VI: di: 'ju:/ [28] visual (or video)
- •Video screen vdu terminal /VI: di: 'ju: ,t3:min3l/ [28]
- •Video recorders
- •Video-conferencing
- •Voltmeter I
1 A technician with experience in servicing hospital equipment.
An engineer who would like to work in broadcasting.
Someone who wants a job which provides a car.
Someone who wants a job with a lot of travelling.
An engineer who wants to work in the USA.
Someone who wants to work in developing countries and who does not require a large salary.
A technician with experience in servicing all kinds of communications equipment.
An electronics engineer who wants to work in Europe and who speaks English, Italian, and German.
Compare your choice with your partners.
Trainee Location Engineers
FILM AND VIDEO
This company has two vacancies for people to train as Location Engineers working on Broadcast and Corporate programmes. Successful applicants would be joining one of America's foremost suppliers of location video crews. Once trained, they can look forward to interesting work which includes travel both in the USA and abroad.
Applicants should have a suitable qualification in Electronics, Telecommunications, or similar. A clean driving license and preferably some practical experience of domestic VHS machines and televisions would be an advantage.
Please supply contact telephone number with application in writing to:
Joan Berridge
General Manager
Sunset Film & Video Limited
4900 University Avenue
SAN DIEGO
California
USA
Electronic Engineers
Extremely competitive salaries.
If you would like to hear about outstanding opportunities in Europe to work in the expanding area of personal communication systems, write to:
Euroengineer Ltd
Austin Street
Norwich
NJ21BL
Enclose your CV and the names of two referees. Applicants should have a degree or equivalent in electronics or a related discipline. A good command of foreign languages woud be an advantage.
Wanted urgently
Practical people for the Third World
We seek practical people with skills to pass on to the developing world. You can help to linkupthe developed and the developing world.
If you can fill one of these vacancies, contact us at once.
Current requests include:
Studio Electronics Engineer
For more details, please write to:
LINK, 10 Summer Gardens, London, SW14 2LH.
Conditions of work:
Pay based on local rates
Posts are for a minimum of 2 years
You should be without dependants
Many employers will grant leave of absence
I'm interested. I have the following training/ experience:
□ □ □
□ □ □
Refrigeration/Radio/ TV Engineers
Hospital Electronics Engineers
Electrical Engineers for instruction/ installation
Electronics Instructors
Lecturers in Power and Communication
Maintenance and Repair Technician
Name Address
LINK
Unking the developed and developing worlds
Angel Recruitment
Radiocomm Systems
Repair and service RF and VHF communications equipment. Salary negotiable +car London
Medical Equipment
Maintain and fault-find x-ray and scanning equipment. Salary negotiable +car South Coast
Data-Processing Support
Provide technical support on disk drives throughout Europe. Salary negotiable. Geneva
Paging Systems
Service and repair of pocket pagers. Travel within Birmingham and surrounding area. Salary negotiable+car Birmingham
Microprocessor Systems
Complex fault-finding of digital and micro systems. Extensive travel in UK and overseas. Salary negotiable. Essex
Write to: Karen Crawley, BSc. Angel Recruitment, Winchester Hampshire SOI 9 1QB
Writing Writing a CV and letter of application Task 10 Complete your CV.
CORRICULUM VITAE
Personal details
Name
Date of birth Address
Marital status Education
Work experience
Hobbies and interests
Referees
Academic Work
Task 11 Write a letter of application for one of the jobs advertised in this unit. Base your
letter on the one shown in Task 2 on page 168.
Student A
Speaking practice
Unit 1
RV1
notes:
Q1 is BC477(PNP)
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Unit 5
Cell
Mercury
Lithium
Type ?
Output voltage 1.35V Applications ?
hearing aids, watches, calculators
primary
backup for computer RAM memories,
Usual size
Advantages
small size
but high energy
button and small cylindrical cells
?
high voltages,
last for long periods at low
currents
Disadvantages
lithium is poisonous, used cells should be disposed of carefully
в
the
signal is generated
transmitter
i
the
signal is amplified
detector
CD
1
4-<D
J
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—«-
indicator
receiver
transmitting antenna
03
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