Data Sheet-1
General Description
The Rane AD 22 and AD 22B are fully balanced two
Input, two Output audio alignment Delays providing a range
of 0.011 to 327.68 milliseconds on each Output. The Delay of
each Output is independently adjustable in 10 microsecond
and 1 millisecond increments.
Each Output has two nonvolatile Memories (no batteries
required), A and B, for easy access to previously stored Delay
values. Remote Recall screw terminals on the rear accept
external configuration switches, permitting independent
remote recall of the Memories.
Two versions exist: the AD 22B features XLR Inputs and
Outputs, and is CE certified for emissions. The AD 22
features screw terminal connections, and may be used when
CE emission certification is not required. Both units are CE
safety exempt, and both use a CE certified power supply.
Housed in a single rack space, the unit can operate as two
independent channels (dual mono), as a stereo pair (edit both
channels simultaneously), or, internally configured as a mono
device, provides twice the Delay range of a single channel
(655.34 msec).
The AD 22 and AD 22B employ the Dolby™ Time Link
1-bit delta-sigma encode/decode circuit; the same circuit used
in some Dolby surround sound decoding units for home
theater systems. This ensures the highest possible audio
quality throughout the system.
Delay values can be displayed in milliseconds, feet or
meters. The ambient temperature of the room may be manu-
ally entered in degrees Celsius or Fahrenheit. This tempera-
ture is used to accurately convert distance into time.
A recessed rear panel switch is available for locking out
front panel controls. In this mode, all of the front panel
pushbuttons are disabled with the exception of the Channel
select and Display Mode buttons. The Channel button remains
active so the user may view the Delay values without risk of
changing them, and the Display Mode button allows display-
ing the Delay values in milliseconds, feet or meters. Internal
jumpers are available to enable or disable Bypass while in
Front Panel Lockout mode. The default setting of these
jumpers
disables
Bypass in Front Panel Lockout mode.
Independent bypass relays provide a fail safe, hard-wired
bypass in case of power loss.
The AD 22 and AD 22B are unity gain devices with
Sensitivity controls to provide proper internal levels for the
Dolby Time Link circuit. If the input signal is nom4
dBu, set the Sensitivity control fully counter clockwise (+4
dBu). For those unable to touch a cable and determine its
signal level, Signal present and Clip indicators provide visual
acknowledgment that the Input signal is within optimal range.
Powered from a low voltage UL listed and CSA certified
remote power supply (230 VAC supply meets LVD 73/23/
EEC), the AD 22B is exempt from safety agency require-
ments, and may be used in any installation mandating agency
compliance.
Dolby and the double-D symbol are trademarks of Dolby
Laboratories Licensing Corporation.
Features
• 1-Bit Dolby™ Time Link Conversion
• Two Independent Channels (2 In - 2 Out)
• 0.011 to 327.68 ms Delay Range per Channel
• Independent 10µs and 1ms Step Sizes
• Independent Remote Memory Recall
• Two EEPROM Memories per Channel (No Batteries)
• Front Panel Lockout Switch on Rear
• Delay Display in Milliseconds, Feet or Meters
• Fail-Safe Bypass for Each Channel
• AC 22 has Active Balanced
Screw Terminal Inputs & Outputs
• AC 22B has Active Balanced
XLR Inputs & Outputs
• UL/CSA/CE Remote Power Supply
AD 22 & AD 22B
AUDIO DELAYS
129.57
129.57
DATA SHEET
