WEEK 2: RIC and SUPERHET

Question 1

Who can get a radio license?

Answer 1

Anyone as long as they don’t have a disability that prevents them from operating a radio

Question 2

When communicating on the radio, what is the first thing you say?

Answer 2

Who you are talking to

Question 3

What is the message format?

Answer 3

Who you are talking

then: this is
then: your call sign’\
then: your message
then: OVER

Question 4

The time 4:45am is expressed as?

Answer 4

0445

Question 5

The time 6:37pm is expressed as?

Answer 5

1837

Question 6

What is the time zone that we use for RIC?

Answer 6

UTC/GMT/Zulu time

Question 7

A “.” is said as what?

Answer 7

Decimal

Question 8

The word “HEAVY” is used to describe what?

Answer 8

An aircraft weighing more than 300,000lbs

Question 9

If you need someone to repeat the message what do you say?

Answer 9

SAY AGAIN

Question 10

How long should signal/radio checks last?

Answer 10

10s

Question 11

On a signal/radio check, when someone responds “5 by 5” what does the first and second numbers mean?

Answer 11

the first number is the READABILITY

the second number is the STRENGTH

Question 12

A distress signal uses what?

Answer 12

MAYDAY

Question 13

An urgency signal uses what?

Answer 13

PAN PAN

Question 14

What is the max output power for your radio license good for?

Answer 14

250W ERP

Question 15

Why do we want the tuned circuits and Local Oscillator to be tuned at the same time?

Answer 15

so there’s always an IF between them

Question 16

How do we get the IF?

Answer 16

Mixer mixes the LO with incoming RF signal

Question 17

Why do we want the signal to be as sinusoidal as possible?

Answer 17

So no harmonics are produced

Question 18

In the superhet receiver, where do we encounter the MOST gain (1000x)?

Answer 18

The IF

Question 19

What controls the gain of the IF so that the proper voltage always comes out of the Detector?

Answer 19

AGC

Question 20

What is the purpose of squelch?

Answer 20

a unique circuit for comms, it keeps the audio nice and quiet unless we are receiving a signal

Question 21

What do we use to monitor backup/carrier squelch?

Answer 21

AGC

Question 22

Squelch operates at how many volts?

Answer 22

2uV

Question 23

AGC operates at how many volts?

Answer 23

20uV