Receiving Systems
The diagram in Fig. 8C9 shows a simplified RADAR mixer circuit using a crystal diode as the first detector. What is the output of the circuit when no echoes are being received?
-
60 MHz CW.
-
4095 MHz CW.
-
4155 MHz CW.
-
Correct AnswerNo output is developed.
"(Radar) Echoes" is a synonym for "radar signals".
If no radar signals are being recieved, the mixer is only receiving the signal from the LO - Local Oscillator, therefore the mixer is generating no output signal.
No signal in, no signal out, so Answer D. is the right answer.
Last edited by jahman. Register to edit
What component of a RADAR receiver is represented by block 49 in Fig. 8A1?
-
Discriminator.
-
IF amplifier.
-
Klystron.
-
Correct AnswerCrystal detector (the mixer).
This would be where the crystal detector section goes. Hint: take a look at the flow from the waveguide since it mirrors the magnetron flow up to the IF AMP section.
-KQ4JXT
Last edited by spencer.chattin. Register to edit