T3D: Interference to and from consumer devices, public relations, intentional and unintentional interference
T3D01:
What should you do if you receive a report that your transmissions are causing splatter or interference on nearby frequencies?
Check transmitter for off frequency operation or spurious emissions
Increase transmit power
Change mode of transmission
Report the interference to the equipment manufacturer
T3D02:
Who is responsible for taking care of the interference if signals from your transmitter are causing front end overload in your neighbor's television receiver?
The owner of the television receiver is responsible
You alone are responsible, since your transmitter is causing the problem
Both you and the owner of the television receiver share the responsibility
The FCC must decide if you or the owner of the television receiver is responsible
T3D03:
What is the major cause of telephone interference?
The telephone was not equipped with adequate interference protection when manufactured.
The telephone wiring is inadequate
Tropospheric ducting at UHF frequencies
Improper location of the telephone in the home
T3D04:
What is the proper course of action if you unintentionally interfere with another station?
Properly identify your station and move to a different frequency
Rotate your antenna slightly
Increase power
Change antenna polarization
T3D05:
When may you deliberately interfere with another station's communications?
Never
Only if the station is operating illegally
Only if the station begins transmitting on a frequency you are using
You may cause deliberate interference because it can't be helped during crowded band conditions
T3D06:
Who has exclusive use of a specific frequency when the FCC has not declared a communication emergency?
No station has exclusive use of any frequency
Any net station that has traffic
The station first occupying the frequency
Individuals passing health and welfare communications
T3D07:
What effect might a break in a cable television transmission line have on amateur communications?
TV interference may result when the amateur station is transmitting, or interference may occur to the amateur receiver
A break cannot affect amateur communications
Harmonic radiation from the TV may cause the amateur transmitter to transmit off-frequency
The broken cable may pick up very high voltages when the amateur station is transmitting
T3D08:
What is the best way to reduce on the air interference when testing your transmitter?
Use a dummy load when testing
Use a short indoor antenna when testing
Use upper side band when testing
Use a simplex frequency instead of a repeater frequency
T3D09:
What rules apply to your station when using amateur radio at the request of public service officials or at the scene of an emergency?
FCC
RACES
ARES
FEMA
T3D10:
What do RACES and ARES have in common?
Both organizations provide communications during emergencies
They represent the two largest ham clubs in the United States
One handles road traffic, the other weather traffic
Neither may handle emergency traffic
T3D11:
What is meant by receiver front-end overload?
Interference caused by strong signals from a nearby source
Too much voltage from the power supply
Too much current from the power supply
Interference caused by turning the volume up too high
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Color key:
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● = Unseen
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● = Weak
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● = Review
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● = Learned
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● = Incorrect answer
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