General Class

What is the stage in a VHF FM transmitter that generates a harmonic of a lower frequency signal to reach the desired operating frequency?

Which intermodulation products are closest to the original signal frequencies?

What is the total bandwidth of an FM phone transmission having 5 kHz deviation and 3 kHz modulating frequency?

What is the frequency deviation for a 12.21 MHz reactance modulated oscillator in a 5 kHz deviation, 146.52 MHz FM phone transmitter?

Why is it important to know the duty cycle of the mode you are using when transmitting?

Why is it good to match receiver bandwidth to the bandwidth of the operating mode?

What is the relationship between transmitted symbol rate and bandwidth?

What combination of a mixer’s Local Oscillator (LO) and RF input frequencies is found in the output?

What process combines two signals in a non-linear circuit to produce unwanted spurious outputs?

Which of the following is an odd-order intermodulation product of frequencies F1 and F2?

Which digital mode is used as a low-power beacon for assessing HF propagation?

What part of a packet radio frame contains the routing and handling information?

Which of the following describes Baudot code?

In an ARQ mode, what is meant by a NAK response to a transmitted packet?

What action results from a failure to exchange information due to excessive transmission attempts when using an ARQ mode?

Which of the following narrow-band digital modes can receive signals with very low signal-to-noise ratios?

Which of the following statements is true about PSK31?

Which is true of mesh network microwave nodes?

How does forward error correction (FEC) allow the receiver to correct data errors?

How are the two separate frequencies of a Frequency Shift Keyed (FSK) signal identified?