Module 11 Quiz

In an amateur digital radio system, the modem is connected to the ________.

Tags

NGSS.MS-PS4-3

If your third-floor amateur station has a ground wire running 10 metres (33 feet) down to a ground rod, why might

you get an RF burn if you touch the front panel of your HF transceiver?

• Because the ground rod is not making good contact with moist earth

• Because of a bad antenna connection, allowing the RF energy to take an easier path out of the transceiver

  through you

• Because the ground wire has significant reactance and acts more like an antenna than an RF ground

  connection

• Because the transceiver's heat-sensing circuit is not working to start the cooling fan

One result of a slight mismatch between the power amplifier of a transmitter and the antenna would be:

• smaller DC current drain

• reduced antenna radiation

• radiated key-clicks

• lower modulation percentage

Tags

NGSS.HS-PS4-5

NGSS.HS-PS3-5

An antenna changeover switch in a transmitter-receiver combination is necessary:

• so that one antenna can be used for transmitter and receiver

• to change antennas for operation on other frequencies

• to prevent RF currents entering the receiver circuits

• to allow more than one transmitter to be used

Tags

NGSS.HS-PS4-5

What is one way to shorten transmitter tune-up time on the air to cut down on interference?

• Tune up on 40 metres first, then switch to the desired band

• Use twin lead instead of coaxial cable transmission lines

• Use a long wire antenna

• Tune the transmitter into a dummy load

To obtain efficient transfer of power from a transmitter to an antenna, it is important that there is a:

• proper method of balance

• high load impedance

• matching of impedance

• low load resistance

In designing an HF station, which component would you use to reduce the effects of harmonic radiation?

• Low Pass filter

• SWR bridge

• Dummy Load

• Antenna switch

To set your station clock accurately to UTC, you could receive the most accurate time off the air from _______?

• Your local television station

• Your local radio station

• CHU, WWV or WWVH

• A non-directional beacon station

Tags

NGSS.HS-PS4-5

NGSS.HS-PS4-3

Which of the following are required when you start out as an amateur radio operator?

• A transcriber

• A low pass filter

• A backyard

• Power supply

Tags

NGSS.HS-PS4-5

What is this?

• Antenna

• Radio Transponder

• Radio transceiver

• Radio Transcriber

Tags

NGSS.HS-PS4-5

NGSS.HS-PS4-3

NGSS.HS-PS4-1