Mixers

Question 1

What is the image frequency if the normal channel is 151.000 MHz, the IF is operating at 11.000 MHz, and the LO is at 140.000 MHz?

Answer 1

129.000 MHz

Question 2

What is the mixing process in a radio receiver?

Answer 2

The combination of two signals to produce sum and difference frequencies.

Question 3

In what radio stage is the image frequency normally rejected?

Answer 3

RF

Question 4

What are the principal frequencies that appear at the output of a mixer circuit?

Answer 4

The original frequencies and the sum and difference frequencies.

Question 5

If a receiver mixes a 13.8 MHz VFO with a 14.255 MHz receive signal to produce a 455 kHz intermediate frequen signal, what type of interference will a 13.345 MHz signal produce in the receiver?

Answer 5

An image response.

Question 6

What might occur in a receiver if excessive amounts of signal energy overdrive the mixer circuit?

Answer 6

Spurious mixer products are generated.