Rane AD 22B User Manual

Page 4

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Manual-4

RECALLING DELAYS

Press the RECALL button. Each press of this button

alternately Recalls stored Memories (A then B then A…) for
the selected Channel only.

Tip: To recall Memories into both Channels simulta-

neously, store both Channel’s values into the same Memory–
A or B. With both Channels selected (both CHAN LEDs on),
pressing RECALL causes both Channels to Recall the same
Memory.

REMOTE RECALLS

The rear REMOTE RECALL terminals are functionally

equivalent to the front panel RECALL button. When the
switch closes, Memory B is recalled. Memory A is recalled by
opening the switch. These terminals can not be locked out.
Only one switch at a time is read by the microcontroller.
Thus, when both Channel’s terminals are wired with a single
switch for Stereo operation, the switch/Channel that is read
last is displayed.

Tip: Note the weather forecast for your event’s time of

day. Set up Memory A’s Delay value for your stack’s distance
at one temperature, and Memory B’s value for a different
temperature. Then during the warmer part of the day, recall
Memories to suit the climate.

INTERNAL BYPASS JUMPER SETTING

Internal jumpers enable or disable the BYPASS buttons

while in Front Panel Lockout mode. The default setting of
these jumpers disables the BYPASS buttons in Front Panel
Lockout mode. (See Detail C on enclosed drawing 522-246.)

CONFIGURING FOR MONO OPERATION

Internal jumpers allow the AD 22B to be configured as a

Mono device with twice the normal Delay, 655.34 millisec-
onds. Three internal jumpers must be moved to enable Mono
mode. (See Detail D on the enclosed board assembly draw-
ing.) Do not use Channel 2’s Input/Output connectors in
Mono mode. Only the CHANNEL 1 Inputs and Outputs are
active. The CHAN button is disabled, since there is no need to
change Channels. Channel 2 is placed in Bypass and its
BYPASS button is disabled.

HOLE PLUGS

Once your system is properly configured, the SENSITIV-

ITY knobs can be removed and the unit secured by replacing
the knobs with the provided hole plugs. The third hole plug is
for use with the rear-mounted LOCKOUT switch.

OPERATING INSTRUCTIONS

Once you have properly connected the AD 22B to the

system, turn on the power. When the AD 22B is first powered
it displays the words “RANE” and “Ad 22”. During this time the
unit is performing initialization and diagnostics routines.
After initialization, two messages are briefly displayed. The
first is the revision level of the software installed in the unit.
The second message reports the internal Stereo/Mono
configuration,“2CHAN” for Stereo, and “1CHAN” for Mono.

The first time you power the AD 22B it is in BYPASS,

and functions like an expensive wire. This is useful for initial
trouble shooting and allows verification of signal flow.

THE BASICS

The AD 22B is a two Channel device. Each Channel has a

current Delay value that is always active/heard. You can only
edit the current Delay values in each Channel, which can then
be stored in either of two nonvolatile Memories, A and B.

SENSITIVITY SETUP

The first step is to apply signal, and adjust the SENSITIV-

ITY controls. If you know the nominal level, adjust the
control so its indicator points to that level. Otherwise, set the
SENSITIVITY control so high signal peaks just illuminate the
CLIP indicator, then back off a little.

ADJUSTING CURRENT DELAY VALUE

One Channel at a time: Press the CHAN button to select

the desired Channel. The LED display shows the current
Delay value of the selected Channel. Press the up/down
buttons until the desired Delay value is reached. That’s it!
Press the CHAN button until the other CHAN LED is lit and
edit its current Delay value.

Both Channels simultaneously: If you’ve selected both

Channels (both CHAN LEDs on), the LED display shows the
smaller of the two Channel’s current Delay values. Changing
this value changes the other Channel’s value by the same
relative amount. Check the other Channel’s current Delay
value by selecting it with the CHAN button. There are two
things to be careful of at this point: The first is to pay close
attention to the CHAN LEDs that indicate the Channel you
are viewing, it cycles from CHAN 1 to CHAN 2 to both and
back again. (both always displays the lower of the two
Channel’s current Delay values.) The second gotcha at this
point is pressing the RECALL button. This writes over the
changes you’ve made if you have not stored them.

STORING DELAYS

Press the STORE button. The STORE LED stops flashing.

This Stores the current Delay values into each Channel’s
current Memory (A or B). The current Memory for each
Channel is indicated by the MEMORY LED which is lit when
editing that Channel. Both Channel's current Delay values are
Stored with each press of the STORE button.

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