Rx/Tx
How many volts is Key 1 and Key 2 in Receive mode?
Key 1: 5V
Key 2: 5V
The AN/GRC–171 and AN/GRC–211 are designed primarily for
Air traffic control communications
What is Side tone?
Mic feedback back into the mic
GRC-171 operates in the ___ Frequency Range
GRC-211 operates in the ___ Frequency Range
GRC-171 operates in the Ultra high Frequency Range
GRC-211 operates in the Very high Frequency Range
What is the relationship/Correlation between RF, AGC, and Gain?
RF - Goes Up
AGC - Goes Up
Gain - Goes Down
How many volts is key 1 and key 2 in transmit mode?
Key 1: 0V
Key 2: 0V
The transceivers consist of ___ plug-in modules.
9
How many alignments are in Transceivers?
Audio Adjust
Side Tone
Squelch
MOD%
What type of conversion does the A3 module utilize?
Dual/Double IF conversion
The power supply is comprised of how many modules?
Three
Where is the image frequency attenuated?
In the RF filter module
What is the final stage of Audio Amplification
Q1 Modulator
How many stages of AGC are developed?
3
VHF is ___ Mhz above operating frequency and ___ Mhz below UHF.
VHF is 30Mhz above operating frequency and 30Mhz below UHF.
(Will be on test) What is the purpose of the noise channel IF circuit?
Cuts off the injection amplifier for sharp noise pulses, e.g., radar pulses
Which Key gets triggered first?
Key 2 - Slow Attack
What is the possible frequency range for the A4 when using voice audio?
300 Hz to 3000 Hz
The squelch relay is energized; this means that the set is...
Unsquelched
When A3 receives a signal it starts at the UHF mixer, under what circumstance does it start at the A10A5 first instead.
If the incoming signal is VHF
The module that prevents the power supply from having an RF signal induced into it is the ___ module.
A10A3 Module
What makes VHF more sensitive than UHF?
A10 A5 RF amplifier
What is the function of the compression amplifier in the A4 module?
It limits the output signal if the input signal gets too large.
It amplifies and controls the output signal.
It keeps the output signal constant for varying input signals.
It provides all of the above.
What are the 3 Stages of AGC?
1st Stage - signal strength of 3uV to 10uV
2nd Stage - signal strength of 10uV to 100uV
3rd Stage - signal strength greater than 100uV
What is the primary purpose of the A2?
To provide a stable TX operating frequency and a stable injection frequency for RX.