- A low pass filter in an HF station is most effective when connected:
A. as close as possible to the transceiver output
B. as close as possible to the antenna tuner output
C. as close as possible to the antenna
D. midway between the transceiver and the antenna
- A low pass filter in a HF station is most effective when connected:
A. as close as possible to the antenna
B. as close as possible to the antenna tuner output
C. as close as possible to the linear amplifier input
D. as close as possible to the linear amplifier output
- In designing an HF station, which component would you use to reduce
the effects of harmonic radiation?
A. Dummy load.
B. Low pass filter.
C. Antenna switch.
D. SWR bridge.
- Which component in an HF station is the most useful for determining the effectiveness
of the antenna system?
A. SWR bridge.
B. Antenna switch.
C. Linear amplifier.
D. Dummy load.
- Of the components in an HF station, which component would normally be connected
closest to the antenna, antenna tuner and dummy load?
A. Transceiver.
B. Low pass filter.
C. Antenna switch.
D. SWR bridge.
- Of the components in an HF station, which component would be used to
match impedances between the transceiver and the antenna?
A. Antenna tuner.
B. Antenna switch.
C. Dummy load.
D. SWR bridge.
- In an HF station, which component is temporarily connected in the tuning process?
A. SWR bridge.
B. Low pass filter.
C. Antenna tuner.
D. Dummy load.
- In an HF station, the antenna tuner is usually used for matching the transceiver with:
A. most antennas when operating below 14 MHz
B. most antennas when operating above 14 MHz
C. mono-band Yagi type antennas
D. tri-band Yagi antennas
- In an HF station, the antenna tuner is commonly used:
A. with most antennas operating above 14 MHz
B. to tune into dummy loads
C. to tune low pass filters
D. with most antennas when operating below 14 MHz
- In a digital system, the ___________ is controlled by the computer.
A. antenna
B. power supply
C. transceiver
D. input/output
- In a digital system, the modem is connected to the ___________.
A. amplifier
B. computer
C. antenna
D. input/output
- In a digital system, the transceiver is connected to the ____________.
A. modem
B. computer
C. scanner
D. input/output
- In a digital system, the modem is connected to the _____________.
A. input/output
B. transceiver
C. scanner
D. antenna
- When switching from receive to transmit:
A. the receiver should be muted
B. the transmitter oscillator should be turned off
C. the receiving antenna should be connected.
D. The power supply should be off
- A switching system to enable the use of one antenna for a transmitter and a receiver
should also:
A. ground the antenna on receive
B. disable the unit not being used
C. switch between meters
D. disconnect the antenna tuner
- An antenna changeover switch in a transmitter-receiver combination
is necessary:
A. so one antenna can be used for transmitter and receiver
B. to change antennas for operation on other frequencies
C. to prevent RF currents entering the receiver circuits
D. to allow more than one transmitter to be used
- Which of the following components could be used as a dynamic
microphone?
A. Crystal earpiece.
B. Resistor.
C. Loudspeaker.
D. Capacitor.