SUBELEMENT T4 [2 Exam Questions - 2 Groups] Amateur radio practices and station setup

SUBELEMENT T4SUBELEMENT T4[2 Exam Questions - 2 Groups][2 Exam Questions - 2 Groups]

Amateur radio practices and station setup

2Microhams 2010 Technician

T4 – Amateur PracticesT4 – Amateur Practices

T4AT4A - Station setup; microphone, speaker, - Station setup; microphone, speaker, headphones, filters, power source, connecting a headphones, filters, power source, connecting a computer, RF groundingcomputer, RF grounding

T4BT4B - Operating controls; tuning, use of filters, - Operating controls; tuning, use of filters, squelch, AGC, repeater offset, memory channelssquelch, AGC, repeater offset, memory channels

3Microhams 2010 Technician

T4A01 Which of the following is true T4A01 Which of the following is true concerning the microphone connectors on concerning the microphone connectors on amateur transceivers?amateur transceivers?

A.A. All transceivers use the same microphone All transceivers use the same microphone connector typeconnector type

B.B. Some connectors include push-to-talk and Some connectors include push-to-talk and voltages for powering the microphonevoltages for powering the microphone

C.C. All transceivers using the same connector type are All transceivers using the same connector type are wired identicallywired identically

D.D. Un-keyed connectors allow any microphone to be Un-keyed connectors allow any microphone to be connectedconnected

4Microhams 2010 Technician

T4A01 Which of the following is true T4A01 Which of the following is true concerning the microphone connectors on concerning the microphone connectors on amateur transceivers?amateur transceivers?

A.A. All transceivers use the same microphone All transceivers use the same microphone connector typeconnector type

B.B. Some connectors include push-to-talk Some connectors include push-to-talk and voltages for powering the microphoneand voltages for powering the microphoneC.C. All transceivers using the same connector type are All transceivers using the same connector type are

wired identicallywired identically

D.D. Un-keyed connectors allow any microphone to be Un-keyed connectors allow any microphone to be connectedconnected

5Microhams 2010 Technician

T4A02 What could be used in place of a T4A02 What could be used in place of a regular speaker to help you copy signals regular speaker to help you copy signals in a noisy area?in a noisy area?

A.A. A video displayA video display

B.B. A low pass filterA low pass filter

C.C. A set of headphonesA set of headphones

D.D. A boom microphoneA boom microphone

Station Setup and Operation6

Communications HeadsetCommunications Headset

7Microhams 2010 Technician

T4A02 What could be used in place of a T4A02 What could be used in place of a regular speaker to help you copy signals in a regular speaker to help you copy signals in a noisy area?noisy area?

A.A. A video displayA video display

B.B. A low pass filterA low pass filter

C.C. A set of headphonesA set of headphonesD.D. A boom microphoneA boom microphone

8Microhams 2010 Technician

T4A03 Which is a good reason to use a T4A03 Which is a good reason to use a regulated power supply for regulated power supply for communications equipment?communications equipment?

A.A. It prevents voltage fluctuations from reaching It prevents voltage fluctuations from reaching sensitive circuitssensitive circuits

B.B. A regulated power supply has FCC approvalA regulated power supply has FCC approval

C.C. A fuse or circuit breaker regulates the powerA fuse or circuit breaker regulates the power

D.D. Power consumption is independent of loadPower consumption is independent of load

9Microhams 2010 Technician

T4A03 Which is a good reason to use a T4A03 Which is a good reason to use a regulated power supply for communications regulated power supply for communications equipment?equipment?

A.A. It prevents voltage fluctuations from It prevents voltage fluctuations from reaching sensitive circuitsreaching sensitive circuitsB.B. A regulated power supply has FCC approvalA regulated power supply has FCC approval

C.C. A fuse or circuit breaker regulates the powerA fuse or circuit breaker regulates the power

D.D. Power consumption is independent of loadPower consumption is independent of load

Radio and Electronic Fundamentals10

Power SupplyPower Supply

This Daiwa power supply has a meter that can display voltage and current

11Microhams 2010 Technician

T4A04 Where must a filter be installed to T4A04 Where must a filter be installed to reduce harmonic emissions?reduce harmonic emissions?

A.A. Between the transmitter and the antennaBetween the transmitter and the antenna

B.B. Between the receiver and the transmitterBetween the receiver and the transmitter

C.C. At the station power supplyAt the station power supply

D.D. At the microphoneAt the microphone

12Microhams 2010 Technician

T4A04 Where must a filter be installed to T4A04 Where must a filter be installed to reduce harmonic emissions?reduce harmonic emissions?

A.A. Between the transmitter and the antennaBetween the transmitter and the antennaB.B. Between the receiver and the transmitterBetween the receiver and the transmitter

C.C. At the station power supplyAt the station power supply

D.D. At the microphoneAt the microphone

13Microhams 2010 Technician

T4A05 What type of filter should be T4A05 What type of filter should be connected to a TV receiver as the first step connected to a TV receiver as the first step in trying to prevent RF overload from a in trying to prevent RF overload from a nearby 2 meter transmitter?nearby 2 meter transmitter?

A.A. Low-pass filterLow-pass filter

B.B. High-pass filterHigh-pass filter

C.C. Band-pass filterBand-pass filter

D.D. Band-reject filterBand-reject filter

14Microhams 2010 Technician

T4A05 What type of filter should be connected T4A05 What type of filter should be connected to a TV receiver as the first step in trying to to a TV receiver as the first step in trying to prevent RF overload from a nearby 2 meter prevent RF overload from a nearby 2 meter transmitter?transmitter?

A.A. Low-pass filterLow-pass filter

B.B. High-pass filterHigh-pass filter

C.C. Band-pass filterBand-pass filter

D.D. Band-reject filterBand-reject filter

Station Setup and Operation15

Notch (Band Stop) FilterNotch (Band Stop) Filter

Stop Band

High Frequency

Low Frequency

40 dB

0 dB

fcfc

-3 dB

Pass Band

Pass Band

There are notch filters built to notch out the powerful pager transmitters located just above the 2m band.

Very effective notch filters can be made with a 1/2 wavelength piece of coax shorted on one end connected to a coaxial “T” connector on the other. These are often called “stubs”.

Repeaters use cavity notch filters that have very sharp skirts to keep the transmitter from interfering with the receiver, since they’re both active at the same time on very close frequencies.

16Microhams 2010 Technician

T4A06 Which of the following would be T4A06 Which of the following would be connected between a transceiver and connected between a transceiver and computer in a packet radio station?computer in a packet radio station?

A.A. TransmatchTransmatch

B.B. MixerMixer

C.C. Terminal node controllerTerminal node controller

D.D. AntennaAntenna

17Microhams 2010 Technician

T4A06 Which of the following would be T4A06 Which of the following would be connected between a transceiver and connected between a transceiver and computer in a packet radio station?computer in a packet radio station?

A.A. TransmatchTransmatch

B.B. MixerMixer

C.C. Terminal node controllerTerminal node controllerD.D. AntennaAntenna

Station Setup and Operation 18

Terminal Node Controllers (TNC)Terminal Node Controllers (TNC)(Radio Modems)(Radio Modems)

19Microhams 2010 Technician

T4A07 How is the computer's sound card T4A07 How is the computer's sound card used when conducting digital used when conducting digital communications using a computer?communications using a computer?

A.A. The sound card communicates between the The sound card communicates between the computer CPU and the video displaycomputer CPU and the video display

B.B. The sound card records the audio frequency for The sound card records the audio frequency for video displayvideo display

C.C. The sound card provides audio to the microphone The sound card provides audio to the microphone input and converts received audio to digital forminput and converts received audio to digital form

D.D. All of these choices are correctAll of these choices are correct

20Microhams 2010 Technician

T4A07 How is the computer's sound card T4A07 How is the computer's sound card used when conducting digital communications used when conducting digital communications using a computer?using a computer?

A.A. The sound card communicates between the The sound card communicates between the computer CPU and the video displaycomputer CPU and the video display

B.B. The sound card records the audio frequency for The sound card records the audio frequency for video displayvideo display

C.C. The sound card provides audio to the The sound card provides audio to the microphone input and converts received audio microphone input and converts received audio to digital formto digital formD.D. All of these choices are correctAll of these choices are correct

21Microhams 2010 Technician

T4A08 Which type of conductor is best to T4A08 Which type of conductor is best to use for RF grounding?use for RF grounding?

A.A. Round stranded wireRound stranded wire

B.B. Round copper-clad steel wireRound copper-clad steel wire

C.C. Twisted-pair cableTwisted-pair cable

D.D. Flat strapFlat strap

22Microhams 2010 Technician

T4A08 Which type of conductor is best to use T4A08 Which type of conductor is best to use for RF grounding?for RF grounding?

A.A. Round stranded wireRound stranded wire

B.B. Round copper-clad steel wireRound copper-clad steel wire

C.C. Twisted-pair cableTwisted-pair cable

D.D. Flat strapFlat strap

23Microhams 2010 Technician

T4A09 Which would you use to reduce RF T4A09 Which would you use to reduce RF current flowing on the shield of an audio current flowing on the shield of an audio cable?cable?

A.A. Band-pass filterBand-pass filter

B.B. Low-pass filterLow-pass filter

C.C. PreamplifierPreamplifier

D.D. Ferrite chokeFerrite choke

24Microhams 2010 Technician

T4A09 Which would you use to reduce RF T4A09 Which would you use to reduce RF current flowing on the shield of an audio current flowing on the shield of an audio cable?cable?

A.A. Band-pass filterBand-pass filter

B.B. Low-pass filterLow-pass filter

C.C. PreamplifierPreamplifier

D.D. Ferrite chokeFerrite choke

25Microhams 2010 Technician

T4A10 What is the source of a high-pitched T4A10 What is the source of a high-pitched whine that varies with engine speed in a whine that varies with engine speed in a mobile transceiver's receive audio?mobile transceiver's receive audio?

A.A. The ignition systemThe ignition system

B.B. The alternatorThe alternator

C.C. The electric fuel pumpThe electric fuel pump

D.D. Anti-lock braking system controllersAnti-lock braking system controllers

26Microhams 2010 Technician

T4A10 What is the source of a high-pitched T4A10 What is the source of a high-pitched whine that varies with engine speed in a whine that varies with engine speed in a mobile transceiver's receive audio?mobile transceiver's receive audio?

A.A. The ignition systemThe ignition system

B.B. The alternatorThe alternatorC.C. The electric fuel pumpThe electric fuel pump

D.D. Anti-lock braking system controllersAnti-lock braking system controllers

27Microhams 2010 Technician

T4A11 Where should a mobile T4A11 Where should a mobile transceiver's power negative connection transceiver's power negative connection be made?be made?

A.A. At the battery or engine block ground strapAt the battery or engine block ground strap

B.B. At the antenna mountAt the antenna mount

C.C. To any metal part of the vehicleTo any metal part of the vehicle

D.D. Through the transceiver's mounting bracketThrough the transceiver's mounting bracket

28Microhams 2010 Technician

T4A11 Where should a mobile transceiver's T4A11 Where should a mobile transceiver's power negative connection be made?power negative connection be made?

A.A. At the battery or engine block ground At the battery or engine block ground strapstrapB.B. At the antenna mountAt the antenna mount

C.C. To any metal part of the vehicleTo any metal part of the vehicle

D.D. Through the transceiver's mounting bracketThrough the transceiver's mounting bracket

29Microhams 2010 Technician

T4B01 What may happen if a transmitter is T4B01 What may happen if a transmitter is operated with the microphone gain set too operated with the microphone gain set too high?high?

A.A. The output power might be too highThe output power might be too high

B.B. The output signal might become distortedThe output signal might become distorted

C.C. The frequency might varyThe frequency might vary

D.D. The SWR might increaseThe SWR might increase

30Microhams 2010 Technician

T4B01 What may happen if a transmitter is T4B01 What may happen if a transmitter is operated with the microphone gain set too operated with the microphone gain set too high?high?

A.A. The output power might be too highThe output power might be too high

B.B. The output signal might become distortedThe output signal might become distortedC.C. The frequency might varyThe frequency might vary

D.D. The SWR might increaseThe SWR might increase

Icom IC-7000 Multimode TransceiverIcom IC-7000 Multimode Transceiver

Keypad for band changesand frequency entry

Volume/SquelchControl

VFO orTuning Knob

Noise Blanker

Up/Down Buttons

RIT

Tune Step(TS)

32Microhams 2010 Technician

T4B02 Which of the following can be used T4B02 Which of the following can be used to enter the operating frequency on a to enter the operating frequency on a modern transceiver?modern transceiver?

A.A. The keypad or VFO knobThe keypad or VFO knob

B.B. The CTCSS or DTMF encoderThe CTCSS or DTMF encoder

C.C. The Automatic Frequency ControlThe Automatic Frequency Control

D.D. All of these choices are correctAll of these choices are correct

33Microhams 2010 Technician

T4B02 Which of the following can be used to T4B02 Which of the following can be used to enter the operating frequency on a modern enter the operating frequency on a modern transceiver?transceiver?

A.A. The keypad or VFO knobThe keypad or VFO knobB.B. The CTCSS or DTMF encoderThe CTCSS or DTMF encoder

C.C. The Automatic Frequency ControlThe Automatic Frequency Control

D.D. All of these choices are correctAll of these choices are correct

34Microhams 2010 Technician

T4B03 What is the purpose of the squelch T4B03 What is the purpose of the squelch control on a transceiver?control on a transceiver?

A.A. To set the highest level of volume desiredTo set the highest level of volume desired

B.B. To set the transmitter power levelTo set the transmitter power level

C.C. To adjust the automatic gain controlTo adjust the automatic gain control

D.D. To mute receiver output noise when no signal is To mute receiver output noise when no signal is being receivedbeing received

35Microhams 2010 Technician

T4B03 What is the purpose of the squelch T4B03 What is the purpose of the squelch control on a transceiver?control on a transceiver?

A.A. To set the highest level of volume desiredTo set the highest level of volume desired

B.B. To set the transmitter power levelTo set the transmitter power level

C.C. To adjust the automatic gain controlTo adjust the automatic gain control

D.D. To mute receiver output noise when no To mute receiver output noise when no signal is being receivedsignal is being received

36Microhams 2010 Technician

T4B04 What is a way to enable quick T4B04 What is a way to enable quick access to a favorite frequency on your access to a favorite frequency on your transceiver?transceiver?

A.A. Enable the CTCSS tonesEnable the CTCSS tones

B.B. Store the frequency in a memory channelStore the frequency in a memory channel

C.C. Disable the CTCSS tonesDisable the CTCSS tones

D.D. Use the scan mode to select the desired frequencyUse the scan mode to select the desired frequency

37Microhams 2010 Technician

T4B04 What is a way to enable quick access T4B04 What is a way to enable quick access to a favorite frequency on your transceiver?to a favorite frequency on your transceiver?

A.A. Enable the CTCSS tonesEnable the CTCSS tones

B.B. Store the frequency in a memory channelStore the frequency in a memory channelC.C. Disable the CTCSS tonesDisable the CTCSS tones

D.D. Use the scan mode to select the desired frequencyUse the scan mode to select the desired frequency

38Microhams 2010 Technician

T4B05 Which of the following would T4B05 Which of the following would reduce ignition interference to a receiver?reduce ignition interference to a receiver?

A.A. Change frequency slightlyChange frequency slightly

B.B. Decrease the squelch settingDecrease the squelch setting

C.C. Turn on the noise blankerTurn on the noise blanker

D.D. Use the RIT controlUse the RIT control

39Microhams 2010 Technician

T4B05 Which of the following would reduce T4B05 Which of the following would reduce ignition interference to a receiver?ignition interference to a receiver?

A.A. Change frequency slightlyChange frequency slightly

B.B. Decrease the squelch settingDecrease the squelch setting

C.C. Turn on the noise blankerTurn on the noise blankerD.D. Use the RIT controlUse the RIT control

40Microhams 2010 Technician

T4B06 Which of the following controls T4B06 Which of the following controls could be used if the voice pitch of a single-could be used if the voice pitch of a single-sideband signal seems too high or low?sideband signal seems too high or low?

A.A. The AGC or limiterThe AGC or limiter

B.B. The bandwidth selectionThe bandwidth selection

C.C. The tone squelchThe tone squelch

D.D. The receiver RIT or clarifierThe receiver RIT or clarifier

41Microhams 2010 Technician

T4B06 Which of the following controls could T4B06 Which of the following controls could be used if the voice pitch of a single-sideband be used if the voice pitch of a single-sideband signal seems too high or low?signal seems too high or low?

A.A. The AGC or limiterThe AGC or limiter

B.B. The bandwidth selectionThe bandwidth selection

C.C. The tone squelchThe tone squelch

D.D. The receiver RIT or clarifierThe receiver RIT or clarifier

42Microhams 2010 Technician

T4B07 What does the term "RIT" mean?T4B07 What does the term "RIT" mean?

A.A. Receiver Input ToneReceiver Input Tone

B.B. Receiver Incremental TuningReceiver Incremental Tuning

C.C. Rectifier Inverter TestRectifier Inverter Test

D.D. Remote Input TransmitterRemote Input Transmitter

43Microhams 2010 Technician

T4B07 What does the term "RIT" mean?T4B07 What does the term "RIT" mean?

A.A. Receiver Input ToneReceiver Input Tone

B.B. Receiver Incremental TuningReceiver Incremental TuningC.C. Rectifier Inverter TestRectifier Inverter Test

D.D. Remote Input TransmitterRemote Input Transmitter

44Microhams 2010 Technician

T4B08 What is the advantage of having T4B08 What is the advantage of having multiple receive bandwidth choices on a multiple receive bandwidth choices on a multimode transceiver?multimode transceiver?

A.A. Permits monitoring several modes at oncePermits monitoring several modes at once

B.B. Permits noise or interference reduction by Permits noise or interference reduction by selecting a bandwidth matching the modeselecting a bandwidth matching the mode

C.C. Increases the number of frequencies that can be Increases the number of frequencies that can be stored in memorystored in memory

D.D. Increases the amount of offset between receive Increases the amount of offset between receive and transmit frequenciesand transmit frequencies

45Microhams 2010 Technician

T4B08 What is the advantage of having T4B08 What is the advantage of having multiple receive bandwidth choices on a multiple receive bandwidth choices on a multimode transceiver?multimode transceiver?

A.A. Permits monitoring several modes at oncePermits monitoring several modes at once

B.B. Permits noise or interference reduction Permits noise or interference reduction by selecting a bandwidth matching the modeby selecting a bandwidth matching the modeC.C. Increases the number of frequencies that can be Increases the number of frequencies that can be

stored in memorystored in memory

D.D. Increases the amount of offset between receive Increases the amount of offset between receive and transmit frequenciesand transmit frequencies

46Microhams 2010 Technician

T4B09 Which of the following is an T4B09 Which of the following is an appropriate receive filter to select in order appropriate receive filter to select in order to minimize noise and interference for SSB to minimize noise and interference for SSB reception?reception?

A.A. 500 Hz500 Hz

B.B. 1000 Hz1000 Hz

C.C. 2400 Hz2400 Hz

D.D. 5000 Hz5000 Hz

47Microhams 2010 Technician

T4B09 Which of the following is an T4B09 Which of the following is an appropriate receive filter to select in order to appropriate receive filter to select in order to minimize noise and interference for SSB minimize noise and interference for SSB reception?reception?

A.A. 500 Hz500 Hz

B.B. 1000 Hz1000 Hz

C.C. 2400 Hz2400 HzD.D. 5000 Hz5000 Hz

48Microhams 2010 Technician

T4B10 Which of the following is an T4B10 Which of the following is an appropriate receive filter to select in order appropriate receive filter to select in order to minimize noise and interference for CW to minimize noise and interference for CW reception?reception?

A.A. 500 Hz500 Hz

B.B. 1000 Hz1000 Hz

C.C. 2400 Hz2400 Hz

D.D. 5000 Hz5000 Hz

49Microhams 2010 Technician

T4B10 Which of the following is an T4B10 Which of the following is an appropriate receive filter to select in order to appropriate receive filter to select in order to minimize noise and interference for CW minimize noise and interference for CW reception?reception?

A.A. 500 Hz500 HzB.B. 1000 Hz1000 Hz

C.C. 2400 Hz2400 Hz

D.D. 5000 Hz5000 Hz

50Microhams 2010 Technician

T4B11 Which of the following describes T4B11 Which of the following describes the common meaning of the term "repeater the common meaning of the term "repeater offset"?offset"?

A.A. The distance between the repeater's transmit and The distance between the repeater's transmit and receive antennasreceive antennas

B.B. The time delay before the repeater timer resetsThe time delay before the repeater timer resets

C.C. The difference between the repeater's transmit and The difference between the repeater's transmit and receive frequenciesreceive frequencies

D.D. The maximum frequency deviation permitted on The maximum frequency deviation permitted on the repeater's input signalthe repeater's input signal

51Microhams 2010 Technician

T4B11 Which of the following describes the T4B11 Which of the following describes the common meaning of the term "repeater common meaning of the term "repeater offset"?offset"?

A.A. The distance between the repeater's transmit and The distance between the repeater's transmit and receive antennasreceive antennas

B.B. The time delay before the repeater timer resetsThe time delay before the repeater timer resets

C.C. The difference between the repeater's The difference between the repeater's transmit and receive frequenciestransmit and receive frequenciesD.D. The maximum frequency deviation permitted on The maximum frequency deviation permitted on

the repeater's input signalthe repeater's input signal

Station Setup and Operation52

Repeater OperationRepeater Operation

60+ miles60+ miles

Output FreqOutput Freq145.21 MHz145.21 MHzInput FreqInput Freq

144.61 MHz144.61 MHzOffsetOffset

- 600 kHz- 600 kHz

Station Setup and Operation53

Repeater Input/Output OffsetsRepeater Input/Output Offsets

BandBand OffsetOffset

6 meters

1 MHz2 meters

600 kHz1.25 meters

1.6 MHz70 cm

5 MHz33 cm

12 MHz23 cm

20 MHz

54Microhams 2010 Technician

SUBELEMENT T4SUBELEMENT T4[2 exam questions – 2 groups][2 exam questions – 2 groups]