Notes, abstracts, papers, exams and problems of Electronics

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Classified in Electronics

Written at on English with a size of 6.04 KB.


1.      What is the purpose of the HL-suppress buttom?

To switch off the HL temporarily


2.      What is the purpose of the drift control?

Used to ground stabilise true motion display

3.      What is the purpose of the brilliance control?

Adjust signal intensity on the display

4.      How to reduce beam width distortion?

Reduce gain

5.      Which course should be fed in to a stabilised radar picture?

True course

6.      What is the purpose of the VRM control?

To measure distance accurately

7.      Marine radar bearing accuracy is generally?

Not so good

8.      It is a requirement to have The HM-suppress button spring loaded?

Yes, it is an IMO requirement

9.      What is the minimum display diameter required

... Continue reading "Radar" »


Classified in Electronics

Written at on English with a size of 4.31 KB.

1.      18 Is it a requirement for the ARPA to provide warning on connected external equipment?


2.      Is it a requirement for an ARPA to be sea and ground stabilised?


3.      Comparing manual and automatic acquisition, which is most sensitive?

Manual acquisition

4.      What is the difference between a tracking gate and a tracking window?

It is the same thing

5.      What is the purpose of digitizing the radar echoes?

The ARPA tracking system only work with digital signals

6.      What is the purpose of the steady course filter?

Provide stabile target information

7.      Can a target reduction of speed activate the fast filter?


8.      Can a target course change deactivate the slow filter?



... Continue reading "Arpa" »


Classified in Electronics

Written at on English with a size of 3.97 KB.

36.      Does current and drift effect the True vector on a relative motion display?


2.      If you input gyro course to the ARPA, what can you expect?

Error in other ships calculated course

3.      Why is raster scan display “lock up” so dangerous?

The displayed information is no longer relevant

4.      What is dangerous with operating the ARPA in mixed mode over time?

Forgetting that this actually in mixed mode

5.      What can you expect from the ARPA target tracking system in auto acquisition mode?

Small and weak targets may not be acquired

6.      Doesthe line connecting the PAD or POS whit the target indicate target speed?


7.      What is the meaning of a flashing triangle, apex pointing down?

New target

... Continue reading "Arpa" »

Power control.

Classified in Electronics

Written at on English with a size of 40.96 KB.

To control by PWM requires 2 factors:

1-crossing detection signal by 0.

2-? determine the time, every time you walk by 0.

to detect the zero crossing can be performed
through an operational amplifier connected


TCA = 785
Pin Symbol Function
1 GND Earth
2 Q2 *Output 2 Inverted
3 Output U QU
4 Q1 * Output 1 Inverted
5 5Synchronizing voltage Vsync (to detect
zero crossing)
6 Inhibitor
7 QZ Z Output
8 8 Vref voltage stabilized (continuous signal for the
9 9 ramp resistor R9 (for the integrator)
10 C10 ramp Capacitance (for the integrator)
11 11 V11 Control Voltage (for comparator)
12 12 C12 pulse Extension
13 LLong pulse
14 Q1 Output 1
15 Q2 Output 2
16 l sSupply voltage.
2Q ==

Simple present complemento

Classified in Electronics

Written at on English with a size of 2.03 KB.

 When+past simple and while+past continuous. Used to: arifmativo- S+used to+v.Ing, Negativo- S+didn´t use to+inf, Interrogativo- Did+S+use to+inf? Yes, I did, No, I didn´t. Active Voice: Sujeto+verbo+D.C.+Complemento

Passive Voice: Sujeto+verbo+D.C. (by)+Complemento


can/can´t-> puede/no puede

could/couldn´t->podía/no podía

should/shouldn´t->debería/no debería->consejo


mustn´t->no deber->prohibición

have to->tener que

don´t have to-> no tener que->no obligación

may->puedo que

might->podía ser que->posibilidad

Reported Speech


today->that day

tomorrow->the next day/the following day

yesterday->the previous day/the day before

next week->the following... Continue reading "Simple present complemento" »


Classified in Electronics

Written at on English with a size of 1.29 KB.

make-is/are made

is/are making-is/are being made
has/have made-has/have been made
made-was/were made
was/were making-was/were being made
had made-had been made
will make-will be made
will be making-will be being made
will have made-will have been made
can make-can be made
must have made-must have been made

agreement-estar de acuerdo
homelessness-sin techo

Public synchronized int incContador (int val)

Classified in Electronics

Written at on English with a size of 3.5 KB.

            padres = padres -1;
            arrCruce[ultimo][2] = "0";
            arrCruce[ultimo][3] = arrCruce[ultimo][0];
        String c[][] = new String[padres][3];
        int f=0;
        for(vc=0; vc<individuos; vc++){
        int punto = (int)(Math.Random()*genes);
        System.Out.Print("EL PUNTO DE CRUCE ES: " + punto + "\n");
            c[vc][2] = c[vc]
... Continue reading "Public synchronized int incContador (int val)" »


Classified in Electronics

Written at on English with a size of 1.71 KB.

PREFU: pass-will give; PACO: had-would travel; PACO PERF: had gone- would have +ed WISH: a alguien (would..) presente (+ed) pasado (had +ed) USED TO: be used to +ing (estoy acostumbrado a) get used to +ing (acostumbrarse) used to= solia, usyally= suelo P.M. must (debe haber) might (puede) may (debe) can,t (no puede)+ HAVE +ED //  althoug,in spite of,veven though. So as to, for a, in order to  R.S verb + to+ inf (agree, demand, offer, promise, refuse, threaten, claim) Verb+ sb+ to+ inf (advise, allow, ask, beg, command, encourage, forbid,instruct, invite sb, order, permit, remind, urge, warn, want) Verb + ing (accuse sb of, apologise for, admit, boast about, complain to sb about, deny, insist on, suggest) VERB + THAT (agree. Boast, claim,
... Continue reading "ghjklñ" »

Short redaction past simple past continuous and past perfect simple

Classified in Electronics

Written at on English with a size of 1.25 KB.

Past Simple (yo trabaje)

I worked-I did not work- Did I Work?

Pasado continuo (yo estaba trabajando)

I was working/You were working- I was not working -Was I working?

Presente perfecto (yo he trabajado)

I have worked/He has worked- I have not worked- Have I Worked?

Presente perfecto continuo (yo he estado trabajando)

I have been working/He has been working

Pasado perfecto(yo había trabajado)

I had worked- I had not worked- Had i worked?

Pasado perfecto continuo (yo había estado trabajando)

I had been workin- I had not been workin- Had I been Working?

Futuro continuo (yo estaré trabajando)

I will be working- Iwill not be working- Will i be working?

Futuro perfecto (yo habré estado trabajando)

I will have worked- Iwill not have worked- Will I have worked?... Continue reading "Short redaction past simple past continuous and past perfect simple" »

The school

Classified in Electronics

Written at on English with a size of 4.25 KB.

I had brown hair (yo tenia el pelo marron)
We had one car (nosotros teniamos un coche)
He had short hair (el tenia el pelo corto)
Mark had a dictionary (Mark tenia un dicionario)
She had a boyfriend (ella tenia un novio)
You had two childre (tu tenias dos niños)
They had a big house (ellos tenian una casa grande)
I had four brothers (ello tenia cuatro hermanos)
He had curly hair (el tenia el pelo rizado)
We had a computer (nosotros teniamos un ordenador
We didn't have one brother (nosotros no teniamos un hermano)
She didn't have a car (ella no tenia un coche)
They didn't have long hair (ellos no tenian el pelo largo)
. I didn't have a radio (yo no tenia una radio)
We didn't have a cd player ( nosotros no teniamos un lector de cedes)
... Continue reading "The school" »