Audio Precision Portable One Plus Access User Manual

W+F (Wow and Flutter)
The W+F (Wow and Flutter) measurement function is selected by
pressing the FUNCTION W+F key.
The W+F function is used to measure wow and flutter (speed
variations) in analog tape recorders and turntables. The W+F
measurement supports the IEC (DIN), NAB, and JIS standards.
Wow and flutter is measured by playing a 3 kHz or 3.15 kHz reference
tone on the device-under-test. The reference tone is usually
pre-recorded on a device with minimal wow and flutter. The output is
then sent to the Portable One Plus Access for analysis. The instrument
determines the amount of speed fluctuation and the amount of speed
error.
Figure 4-29. Main Panel in W+F Function
GENERATOR
MONITORS
B
A
INPUT
RANGING
INPUT
TERMINATION
INPUT
TERMINATION
LCD DISPLAY
SECONDARY
READING
DETECTOR
INTERNAL
JUMPER
INPUT
MONITOR
SPEAKER/
HEADPHONE
READING
MONITOR
CHANNEL A
CHANNEL B
READING
DETECTOR
(IEC/NAB/JIS)
WOW AND
FLUTTER
DISCRIMINATOR
WEIGHTING
FILTER
PEAK/2-SIGMA
PROCESSOR
FREQUENCY
COUNTER
Figure 4-30. Block Diagram of Wow and Flutter Measurement
4 Operation
Operation Controlling the Analyzer : W+F (Wow and Flutter)
4-48 Portable One Plus Access User's Manual
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Audio Precision Portable One Plus Access Specifications

General

Brand	Audio Precision
Model	Portable One Plus Access
Category	Test Equipment
Language	English