Receive Sec. Flashcards
For AN/GRC 171 UHF WAT receiver sec. What are the first three sections
Mixer, 30MHz, and 30MHz IF ampl.
The first 4 section of the AN/GRC 211 VHF in the receiving sec.
A10A5, mixer, 30MHz filter, and 30MHz IF ampl.
What frequency is coming into the, frequency synthesizer
VHF 180
UHF 270
What 2 frequencys are going into the mixer, of the A3 RF receiver
The injection frequency = 30MHz
The RF from the A7 RF filter
Which amps in the A3 receiver sec. Are duel conversion
30MHz IF amplifier and IF amplifier
The filter/delay sub-module has a delay of
1.2 mili sec., this delay provides the noise channel time to create a blanking pulse
(211) During receive, the output of the A7A3 is applied to the
A10A5
(171) what is the output of the synthesizer during receive operations
Unmodulated 30MHz below operating frequency
What is the function of the detector in the A3 module
Detect audio and provides a carrier derived dc voltage that is used as AGC
What is the purpose of the noise channel IF circuit
To cut off the injection amp. When sharp noise pulses/radar pulses are detected
How many stages of AGC are there
3, stage 1- 3 microv to 10
stage 2- 10 microv to 100
stage 3- 100 microv to anything. greater
What is the function of the compression amp in the A4 module
It keeps the output signal constant for varying input signals
The receive RF module has a (blank) MHz and a (blank) MHz IF
30 and 10.7
Which filter determines overall selectivity of the receiver
A3Fl1, crystal amp.
What is the frequency range for the A4 when using voice audio
300Hz to 3kHz
