Inspection Procedure 11: Poor Reception.


DIAGNOSIS PROCEDURE


STEP 1. Check the state of the antenna.



Q. Is the check result normal?





Step 2. Check to see if inspections are taking place is an area exposed to special electric fields.


Q. Are inspections taking place under special electric field conditions (underneath garage, inside a building, etc).?





Step 3. Relocate and check.



Q. Is reception of the strongest radio frequency possible within the area?





Step 4. Tune then check.


Q. Did the sensitivity improve after tuning?





STEP 5. Check with several broadcasting stations.


note Multipath noise and fading noise: Because the frequency of FM waves is extremely high, it is highly susceptible to effects from geological formations and buildings. These effects disrupt the broadcast signal and obstruct reception in several ways.
Multipath noise
  • This describes the echo that occurs when the broadcast signal is reflected by a large obstruction and enters the receiver with a slight time delay relative to the direct signal (repetitious buzzing).
Fading noise
  • This is a buzzing noise that occurs when the broadcast beam is disrupted by obstructing objects and the signal strength fluctuates intricately within a narrow range.

Q. Is the abnormality in reception generated only within a certain range?





STEP 6. Check the antenna plug connection to the radio and CD player or CD changer.


Q. Is the antenna plug thoroughly connected to the radio and CD player or CD changer?





STEP 7. Check by temporarily replacing the radio and CD player or CD changer.


Q. Does the another radio and CD player or CD changer work normally?