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AUDIO MEASUREMENT SYSTEMS
Polarity/Phase Study Guide
9
Engineering
Undergraduate 4
07/08/2013

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Cards

Term
DESCRIBE POLARITY?
Definition
•A source or signal is either pushing positive of negative
Term
DESCRIBE PHASE IN FOUR WORDS?
Definition
•Frequency dependent time delay
Term
NAME THREE WAYS TO REVERSE POLARITY?
Definition
•Swap pins 2&3 in cable
•Reversing the speaker wiring
•Polarity switch or setting
Term
TWO SIGNALS OF EQUAL AMPLITUDE AT 0 DEGREES OFFSET WILL RESULT IN?
Definition
•6dB of coupling
Term
TWO SIGNALS OF EQUAL AMPLITUDE AT 180 DEGREES OFFSET WILL RESULT IN?
Definition
•Full Cancellation -100dB
Term
TWO SIGNALS OF EQUAL AMPLITUDE AT 120 DEGREES OFFSET WILL RESULT IN?
Definition
•No coupling or cancellation
Term
READING PHASE TRACES; IF THE TRACE IS ANGLED TO THE LEFT IT IS?
Definition
•Lagging
Term
READING PHASE TRACES; IF THE TRACE IS ANGLED TO THE RIGHT IT IS?
Definition
•Leading
Term
READING PHASE TRACES; IF THE TRACE IS ANGLED STRAIGHT UP AND DOWN IT IS?
Definition
•Wrapping or wrap around
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