Manual-1
OPERATORS MANUAL
AD 22d
AUDIO DELAY
QUICK START
Quickly look around to make sure no one catches you read-
ing this. You’re aware this is the
manual
aren’t you? Wow! Most
people only get about this far in a manual, but there are a few
important things you should know about the AD 22d. So please
keep reading. These few points are summarized in this Cliff Note
version of the manual.
ADJUSTING SENSITIVITY.
First apply a signal with
nominal input level and adjust the SENSITIVITY controls so
the red CLIP LEDs just light, then back off so the LEDs do not
turn on, even with high signal peaks.
SETTING DELAY.
Now that the input signal is calibrated,
press the CHAN button until the CHAN LEDs indicate the
channel you want to set. We cover the special case of adjusting
both
channels simultaneously later (both CHAN LEDs
on
).
Adjust the up/down buttons until the LED display shows the
desired Delay. To adjust the Delay of the other channel press the
CHAN button until the other channel’s LED is lit, and adjust
the Delay as before.
STORING DELAY.
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 lit when
editing that channel. Both channel's current Delay values are
stored with each press of the STORE button.
WEAR PARTS:
This product contains no wear parts.
BYPASS
1
STORE RECALL CHAN
MILLISECONDS
MODE
MEMORY
2
A B
DISPLAY
2
1
1 ms
10
μ
s
1
2
SIGNAL
CLIP
dBu
SIGNAL
SENSITIVITY
SENSITIVITY
CLIP
dBu
0
-16
+4
-20
-4
-12
-8
0
-16
+4
-20
-4
-12
-8
AD 22d
METERS
FEET
AUDIO DELAY
-10 dBV
-10 dBV
HOLD TO SET TEMP
COARSE
FINE
°C
°F
RECALLING DELAY.
To recall a stored Memory, press
RECALL. Each press of this button alternately recalls stored
Memories (A then B then A…) for the selected channel only.
A quick way to recall Memories into both channels simulta-
neously, is to store both channel’s values into the same Memory.
With
both
channels selected (both CHAN LEDs
on
), press
RECALL to restore
both
channel’s Memories at the same time.
SETTING TEMPERATURE.
The AD 22d is factory set for
22°C/71.6°F. To change this, press and hold DISPLAY MODE
and press one of the up/down buttons. Use the 1ms/COARSE
buttons for degrees Celsius or the 10µs/FINE buttons for degrees
Fahrenheit. The LED display shows the temperature setting.
Further pressing of the up/down buttons adjusts the temperature
setting. This temperature is used, with constant 30% humidity,
to calculate the speed of sound for converting delay times into
distance.
Never connect anything except an approved Rane power supply
to the red thing that looks like a telephone jack on the rear of the
unit.
This is an AC input and requires special attention if you do
not have a power supply
exactly
like the one originally packed
with your unit. See the full explanation of the power supply
requirements elsewhere in this manual.
Note: Changing the Delay setting is nearly seamless, though a
single audio click may be expected if an audio signal is present.
