How it Works | The Receiver Flashcards
The receiver must provide ___ and be ___, as the signal it receives will be very weak.
gain, selective
The receiver will pick up ___ the waves passing it. but the ___ will make it respond to only the ones it’s tuned to.
all, tuner
To get audio output from a direction conversion receiver, the signal is mixed with one from a __.
BFO
To hear a signal, it must be within the audio range of ___ Hz and ___ Hz
300 3000
Beat notes are created when any waves of ___ frequencies are mixed.
different
When used with the ADF, the BFO produces a small _C current which differs from the HF by around _ _Hz.
AC, 2 KHz.
The HF and BFO frequencies are fed to a frequency mixer, where they are subtracted from one another to produce ___ frequencies.
4
With the HF and BFO having been subtracted, only the difference/beat frequency can be heard, producing a steady AC of _ _Hz
2 KHz
The squelch circuit eliminates background noise when ___ is being transmitted.
nothing
Demodulation involves using a ___ to ensure that only signal pulses moving in one direction can get through
rectifier
Resistance and inductance are ___ proportional
inversely
The less resistance, the ___ the spike of voltage imposed upon the circuit.
larger
With demodulation, the antenna can be decoupled to send the current into the circuit via a step-up transformer, so that resistance is ___ to make the circuit tune more sharply.
reduced
