Operating instructions

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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. ese 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). is stores the current Delay values into

each channel’s current Memory (A or B). e 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: is product contains no wear parts.

BYPASS

STORE

RECALL

CHAN

MILLISECONDS

MODE

MEMORY

2 A B

DISPLAY

1 ms

10 μs

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

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. e 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. e LED display shows the temperature setting.

Further pressing of the up/down buttons adjusts the temperature

setting. is 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. is 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.

Summary of content (4 pages)

PAGE 1
OPERATORS MANUAL AD 22d AUDIO DELAY 1 SENSITIVITY -10 dBV -8 -12 -4 0 -16 +4 SIGNAL -20 dBu 2 SENSITIVITY -10 dBV -8 -12 0 2 A B 1 2 -16 +4 CLIP 1 -4 SIGNAL -20 dBu MILLISECONDS FEET BYPASS CLIP DISPLAY MODE STORE RECALL CHAN MEMORY 1 ms 10 μs COARSE FINE AD 22d AUDIO DELAY METERS HOLD TO SET TEMP °C °F QUICK START Quickly look around to make sure no one catches you reading this.
PAGE 2
FRONT PANEL DESCRIPTION 1 1 4 5 7 9 2 3 SENSITIVITY -10 dBV -8 -12 2 -4 0 -16 +4 SIGNAL SENSITIVITY -10 dBV -8 -12 0 -20 dBu 2 A B 1 2 BYPASS CLIP 2 MILLISECONDS FEET -20 dBu SIGNAL 1 DISPLAY MODE -16 +4 CLIP 1 -4 11 3 STORE RECALL CHAN MEMORY 6 8 10 1 ms 10 μs COARSE FINE AD 22d AUDIO DELAY METERS HOLD TO SET TEMP 14 °C 12 °F 13 1 SIGNAL LEDs: illuminate green 34 dB before clipping. 2 SENSITIVITY controls: vary incoming signal levels to the A to D converter.
PAGE 3
REAR PANEL DESCRIPTION REMOTE RECALL POWER 650mA CLASS 2 EQUIPMENT 1 2 OPEN MEM A CH 2 OUT CH 2 IN CH 1 OUT CH 1 IN BALANCED WIRING: PIN 2 POSITIVE PIN 3 NEGATIVE PIN 1 CHASSIS GND CLOSED MEM B CH1 CH2 3 GND CH 2 OUT 4 CH 2 IN CH 1 OUT REMOTE RECALL PORT: 5 VOLT SOURCES 0.5 mA CMOS SCHMITT TRIGGER INPUTS THIS DEVICE COMPLIES WITH PART 15 OF THE FCC RULES.
PAGE 4
AD 22d CONNECTION When connecting the AD 22d to other components in your system for the first time, leave the power supply for last. This gives you a chance to make mistakes and correct them before any damage is done to your fragile speakers, headphones, ears, or brains. The AD 22d passes audio while it is unpowered by virtue of its fail safe bypass relays (when the AD 22d functions as a wire). Turn the system volume down before plugging in the AD 22d’s power.