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AD22S Block Diagram
INPUT
RFI Filter
Application Information
DISTANCE MODE
There's more than one way to view your time setting. If you're
tired of looking at milliseconds, the delay setting can also be
viewed in terms relative to distance by changing the displayed
units to feet or meters and by selecting the ambient temperature
in either °C or °F. The AD22S calculates the precise environmen-
tal delay by using the relationship of air pressure and tempera-
ture to the speed of sound.
VIDEO MODE
The AD22S is an effective solution to the problem of aligning
audio with video in broadcast. Because of the latency involved in
processing video streams, timing offset accumulates that can run
as high as several frames or lead to noticeable synchronization
issues. While in Video mode, the AD22S displays the delay time
in the precise number of frames calculated for your current for-
mat and frame rate. You may choose from a selection of the most
(both channels identical)
Sig /
A/D
OL
DELAY MEMORY
NONVOLATILE
MICROCONTROLLER
MEMORY
FRONT PANEL
CONTROLS
D/A
DSP
LCD DISPLAY
common frame rates to match your work situation and environ-
ment. As you adjust the number of frames needed to synchronize
the audio, the AD22S calculates the delay to match exactly what
you need.
REMOTE RECALL
In some situations it may be necessary to recall a stored setting
or enable channel bypass from a location other than where the
AD22S is located. Have a room divider wall? You can install a
switch to select between the two room settings automatically
when the wall is moved. Does the delay for your outdoor speaker
array change with the temperature? Wire up a switch to change
from a memory setting adjusted for one temperature to one saved
for the other when the weather warms up. For these reasons we
have provided remote recall connections on the rear of the unit
that can be wired to standard switches installed in any other
location.
AD22S
AUDIO DELAY
OUTPUT
Bypass
Relay
Bypass
Recall
GND
Remote Ch 2
Bypass
Recall
GND
Remote Ch 1
Delay
Bypass
GND
Front Panel Lockout
Data Sheet-3
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