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SPECIFICATIONS

APPEARANCE AND DIMENSIONAL DIAGRAM

PERFORMANCE:

Frequency Response

20Hz to 20kHz, ± 1dB

Total Harmonic Distortion

Less than 0.03%

Hum and Noise

At least 90dB below maximum output

Delay

Time

0 to 655 msec

Steps

10 

µ 

sec & 1 msec scales (summed) 

 

Propagation Delay

A/D Conversion

Memories

100 

µ

sec

16-bit at 100kHz Sampling Rate

Four-selectable via front panel buttons or

rear panel dry contact to screw terminals.

One master controls up to 15 slave units.

INPUT & OUTPUT:

Input

Type

Electronically balanced (Transformer optional)

Input Impedance
Rated Input Level

10k ohms

+ 4dB*

Maximum Input Level

+ 18dB*

Outputs (x3)

Type

Recommended Load
Rated Output

Electronically balanced (Transformer optional)
600 ohms or higher

+ 4dB* at 600 ohms

Maximum Output Level

+ 18dB*

CONTROLS & PANEL FUNCTIONS:

(Front Panel)

Input Level Control

Attenuation type

Output Level Controls

x 3; Attenuation type

Level Meter

Type

Headroom Indicator; “0” indicates 3dB

below maximum level

LED Points

Memory Selection

Seven segments (Red at 0 and -3dB;

Green at -6, -9, -12, -16, and -26dB.)
4 pushbuttons with LED status indicators

Fine

Fine/Coarse Display Pushbutton with

LED status indicator

Lock

Memory
Clear

Disables function pushbuttons except

memory selection and “Fine”

LED status indicator
Memory Store
Displayed Delay Time Clear

Setting

Display

Up/Down Buttons (x 3)
3-digit numeric display (x 3)

Power

On/off pushbutton with LED status indicator

(Rear Panel)

Protect

Input

outputs

On/off slide switch; Disables all front panel

pushbuttons

Screw terminals (H=Hot, C=Cold, E=Ground)
x 3; Screw terminals (H=Hot, C=Cold,

E=Ground)

Ground

Remote Selection

Signal Ground to Chassis Ground

(removable link)
4-presets; Screw terminals; Selection via

dry contacts to “E”

Master designation by removal of “D”/“E” link

Fuse

Power Socket

250V 0.3A Slow-blow Type (120V version)

250V 0.1A Slow-blow Type (220V/240V version)
EIA AC power cable socket

POWER:

Power Requirements
Power Consumption

AC mains, 50/60KHz

15 watts

PHYSICAL:

Dimensions (W x H x D)

ARCHITECT’S AND ENGINEER’S SPECIFICATIONS

The digital signal delay device shall be capable of delaying an audio input

signal to each of three independently adjustable outputs. The minimum

output time setting shall be 100 microseconds, including propagation

delay, and the time delay at each output shall be adjustable in 10-

microsecond steps up to maximum delay of 655 milliseconds. The unit

shall use 16-bit A-to-D conversion with a 100kHz sampling rate, and shall

have a maximum output-to-noise ratio floor of greater than 90dB. The input

circuitry shall be electronically balanced and shall accept either balanced

or unbalanced sources. The balanced input impedance shall be 10k

ohms. Each output circuit shall be electronically balanced and capable of

driving a load of 600 ohms or greater. The unit shall accept optional input

and output transformers which shall be internally installed via standoffs

and plug-in connectors. A7-segment LED input headroom display shall

indicate 3dB below maximum output for the combination of input and input

level control settings. Frequency response shall be flat (±1dB) from 20Hz

to 20kHz. The digital delay device shall include a digital display that can

be set to indicate the time delay of Outputs “1”, “2” and “3”. A front panel

“Fine” control shall allow the user to set the output delay for output “1”, “2” or

“3” in summed high resolution (1 O-microsecond step) or low resolution

(1 -millisecond step) modes. A “Lock” mode shall be provided which

disables all front panel pushbuttons except the memory selection and

“Fine” keys. A back panel “Protect” switch shall disable all front panel

pushbuttons, leaving only input and output level controls functional. A

security cover shall be provided to protect the front panel controls from

being tampered with. The delay unit shall provide four preset memories for

storage of delay-time settings. The preset memories shall be accessible

via front panel pushbuttons or remotely by means of contact closures

through a rear panel terminal strip. Up to 15 delay units shall be

configurable, with a single master unit to initiate preset selection for all

slave units. The unit shall contain a relay circuit which bypasses all internal

electronics in the event of power failure. lnput and output connections

shall be made via rear panel terminal strip connectors. The unit shall

measure 19.0" wide x 1.7" high x 14.0" deep (483 x 44 x 357mm) with rack

mount ears attached and shall occupy one standard EIA rack space. AC

noise suppression circuitry shall be built in to increase reliability. The unit

shall be a TOA Model D-1103 Digital Signal Delay.

19.0 x 1.7 x 14.0 inches (483x 44 x 357mm)

EIA Rack Mount

Net Weight

OPTIONAL

ACCESSORIES:

9.7 Ibs. (4.4kg)

LT-101 Input Transformer

LT-102 Output Transformer (one per output)

Designed for UL Approval.

*0dB 

IS 

referenced to 0.775V RMS. unless otherwise stated.

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