Ham Radio General Class Test Station Setup and Equipment 3

Question 1

What test instrument is most useful for checking the frequency response and spurious outputs of a transmitter?

Accepted Answer

Spectrum analyzer

Answer

A spectrum analyzer displays signal amplitude versus frequency, revealing harmonics, spurious emissions, and bandwidth of the transmitted signal.

Question 2

What is the purpose of a dummy load in an amateur radio station?

Accepted Answer

Provide a non-radiating resistive load for testing the transmitter

Answer

A dummy load is a 50-ohm non-inductive resistor that dissipates transmitter power as heat without radiating RF, allowing testing without on-air transmission.

Question 3

What does a two-tone test evaluate in a single-sideband transmitter?

Accepted Answer

Transmitter linearity and intermodulation distortion (IMD)

Answer

A two-tone test applies two equal audio tones to the SSB transmitter and examines the output for intermodulation products, which indicate non-linearity.

Question 4

Which type of connector is recommended for low-loss VHF/UHF coaxial cable connections at an amateur station?

Accepted Answer

N-type

Answer

N-type connectors have lower loss and better shielding than PL-259 connectors at VHF and UHF frequencies, making them preferred for these bands.

Question 5

What is the function of a preamplifier placed ahead of an HF receiver or transceiver?

Accepted Answer

Boost weak incoming signals to improve reception on noisy bands

Answer

A preamplifier adds gain before the receiver's first stage, improving signal-to-noise ratio when antenna signals are weak relative to the receiver's noise floor.

Ham Radio General Class Test Practice Test

Ham Radio General Class Test Practice Test

Ham Radio General Class Test Station Setup and Equipment 3