Audio Precision ATS-1 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 ATS-1 Access for analysis. The instrument determines
the amount of speed fluctuation and the amount of speed error.
The upper left corner of the display shows the wow and flutter reading,
which is the amount of fluctuation in the frequency of the incoming
tone. The only available unit is percent. If the input frequency is
below 2.8 kHz, the display will read Lo Fr (low frequency). If the input
Figure 4-28. 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 4-29. Block diagram of Analog Wow and Flutter measurement
4 Functions
W+F (Wow and Flutter) Function Descriptions
4-32 ATS-1Access User's Manual

Audio Precision ATS-1 Access Specifications

General

Brand	Audio Precision
Model	ATS-1 Access
Category	Test Equipment
Language	English