AD3000 Audio Delay/Synchronizer
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Discontinued Product.
Complete technical support provided for units sold.


Features

Delay range of up to 2.048 seconds
Reference quality A/D and D/A conversion
Automatic lip sync correction with compatible video processors
Fastest artifact free delay change in the industry
Automatic pitch correction during delay changes
Digital audio rate conversion
AES/EBU digital input and output (XLR connectors)
SMPTE (unbalanced) digital input and output (BNC connectors)
Stereo analog input and output (XLR connectors)
Power down bypass
Studio Master option adds up to 25% pitch shift, time compression and expansion, extended delay of up to 6 seconds
Optional remote controls

Description

The AD3000 is a low cost audio delay for lip sync correction and other applications where audio signals need to be delayed, transcoded or rate converted. The AD3000D has AES/EBU (balanced) and SMPTE (unbalanced) digital inputs and outputs in addition to stereo analog inputs and outputs. 20 bit linear PCM with 64x over-sampling on the input, and 8x over-sampling on the output results in exceptional performance specifications. The AD3000D is perfectly suited to systems that are all digital, systems that are all analog and analog-to-digital/digital-to-analog conversion in hybrid installations.

When used for automatic lip sync correction with compatible video frame synchronizers, the AD3000's delay tracks the changing video delay using a TTL control pulse from the video synchronizer. The delay in the video can also be measured directly by the Pixel Instruments DD3100 which then "steers" the AD3000. A fixed offset delay can also be added to the varying delay. The AD3000 has the industries fastest rate of delay change, at a controlled rate of up to 5% with the built-in pitch shifter minimizing audible pitch artifacts. For installations that need to process two or more AES/EBU audio pairs, AD3000 can be operated in parallel with excellent tracking.

The digital input can receive any sample rate from 25 kHz to 48 kHz, and the output sample rate can be selected from 32 kHz, 44.056 kHz, 44.1 kHz, or 48 kHz. The input and output sample rates can be independent. The sample rate for the optional analog inputs is 48 kHz with 64x over sampling on the input and 8x over sampling on the output.

The output sample rate can be derived from an internal crystal oscillator, or can be frequency locked to an external video reference (NTSC or PAL) for installations where it is important to synchronize the audio and video sample rates to a common reference. If the input sample rate is 32 kHz, 44.056 kHz, 44.1 kHz, or 48 kHz, the output sample rate can instead be frequency locked to the digital input signal while still maintaining independent rates for the input and output. In automatic mode, with a 32 kHz, 44.056 kHz, 44.1 kHz, or 48 kHz input, the output sample rate is the same as the input rate.

The front panel of the AD3000 includes an LCD mode/status display for quick intuitive operator control, dual bar-graph audio level display, and gain trim controls for the analog input and output. The RS232 control option allows remote control of AD3000 functions via a dedicated remote control panel, or via Windows software running on a PC.

Specifications

Digital Inputs & Outputs
Connectors/Impedance
AES/EBU 3 pin XLR/110O balanced
SMPTE BNC/75O unbalanced
Input sample rate 25 kHz - 48 kHz
Output sample rates 32, 44.056, 44.1, 48 kHz
Video reference 15,734.26 Hz (NTSC) or 15,625 Hz (PAL)
(Digital inputs are bypassed to the outputs with loss of power)

Analog Input/Output & A/D D/A Conversion

Input Connector/Configuration 2 x 3 pin XLR/Balanced
Input impedance 20 k/600O, selectable
Full scale input level +28/+24/+20 dB, selectable
Input gain trim 0 to -20 dB
Encoding format 20 bit linear PCM, 48 kHz sample rate
Delta-sigma modulation, 64x over-sampling
Output Connector/Configuration 2 x 3 pin XLR/Balanced
Output Impedance 24 maximum
Full scale output +28/+24/+20 dBu into 600, selectable
Output gain trim 0 to -20 dB

Analog Input/Output & A/D D/A Conversion (cont'd)

Encoding format 20 bit linear PCM, 48 kHz sample rate 8x over-sampling
(Analog inputs are bypassed to the outputs with loss of power)
Delay Setting Adjustable from 0 to 2.048 sec in 1 mS increments.
Delay can also be set in PAL or NTSC video fields.

Performance - Digital Input to Digital Output

Frequency response < 0.01 dB, 20 Hz to 20 kHz
Dynamic range > 114 dB, 20 Hz to 20 kHz, unweighted
THD + Noise < .003%, 20 Hz to 20 kHz, unweighted at -1 dBFS
SMPTE IM < .005% at -1 dBFS
Channel phase match
Transport delay < 1.9 mS
(All measurements made with fixed audio delay, 48 kHz sample rate)

Performance - Analog Input/Output
Frequency response < 0.1 dB, 20 Hz to 20 kHz
Dynamic range > 97 dB, 20 Hz to 20 kHz, unweighted
THD + Noise < .005%, 20 Hz to 20 kHz, unweighted at 23 dBu
SMPTE IM < .015% at 23 dBu
Channel separation > 80 dB, 20 Hz to 20 kHz
Channel phase match < 1o, 20 Hz to 20 kHz
Transport delay < 1.6 mS
(All measurements made with fixed audio delay, +24 dBu full scale input/output levels selected)

Control
Serial Remote 4 pin telephone jack communicates with DD3100
Delay Pulse Input BNC connector accepts a TTL pulse (active high) to control the offset delay for automatic lip sync correction.
Remote Dump 1/4" stereo jack, closure to ground on tip activates memory dump
RS232 Remote 9 pin D connector
Front Panel Indicators
Input level Dual LED bar graph
Status and modes 20 x 2 LCD display, LED indicators

Power
AC Input 110-120/220-240 V, 50/60 Hz
Consumption 115 Watts Maximum
Mechanical
Width 19.0" (48.3 cm)
Height 1.75" (4.5 cm)
Depth 19.5" (49.6 cm)
Weight 9.8 lb (4.5 kg)

Environmental

Operating Temperature 0oC to 45oC
Storage Temperature -25oC to +75oC
Humidity 10% to 95%, non-condensing

Patents
Pat. 5,202,761, 4,313,135, RE 33,535 Pat. Pending



Prices and specifications are subject to change without notice.