Installing the LT 443D-DA Digital Audio Unit in the LT 443D mainframe can output AES/EBU digital audio signals(four systems), silence signals (one system), and 48 kHz word clock signals.

The AES/EBU signal characteristics (e.g., output level, frequency) can be independently set for each output system.

The sampling frequency is synchronized with the video signal of plug-in unit installed in the mainframe.

Output

AES/EBU Digital Audio Output    

• Number of Outputs:     4 (2-channel output)
• Output Impedance:     75 unbalanced
• Output Amplitude:     1 Vp-p0.1 V (into 75 )
• Output Connector:     BNC

Silence Signal (DARS grade 2) Output    

• Number of Outputs:     1 (2-channel output)
• Output Impedance:     75 unbalanced
• Output Amplitude:     1 Vp-p0.1 V (into 75 )
• Output Connector:     BNC

48 kHz Word Clock    

• Number of Outputs:     1
• Output Impedance:     75 unbalanced (“1 Vp-p” output)
• Output Amplitude:     1 Vp-p0.1 V (into 75 ), 5 V CMOS, selectable
• Output Connector:     BNC

Signal Specifications

Specifications

• ANSI S4.40 (AES3-1992), AES11-1997
• SMPTE 276M, AES-3id-2001

Function

Sampling Frequency:  48 kHz (sync to video signal)
Resolution:  20 bits, 24 bits, selectable

Preemphasis

• OFF, 50/15 , CCITT, selectable
• (CS bit can only be selected.)

Frequency:  50, 100, 150, 200, 250, 300, 400, 500, 600, 750, 800,1.0 k, 1.2 k, 1.5 k, 1.6 k, 2.0 k, 2.4 k, 3.0 k, 3.2 k, 4.0 k, 4.8 k, 5.0 k,6.0 k, 8.0 k, 9.6 k, 10 k, 12 k, 15 k, 16 k, 20 kHz, silence

Level:  -60 to 0 dBFS (settable in 1 dB steps)
Audio Click:  1, 2, 3, 4 sec, none
Output ON/OFF:  Selectable

Timing    

• Variable Range:  1 AES/EBU frame
• Settable in 512 fs (24.576 MHz) steps

 
* The timing can be varied with respect to the Video Unit installed in the LT 443D mainframe. The settings are common to the digital audio, silence and word clock signals.

* Frequency, level, and audio click can be set to each channel.
   Other items (except timing) can be respectively set to the 2-channel output.

Environmental Conditions

• Operating Temperature Range:  0 to 40 °C
• Operating Humidity Range:  90 % RH (without condensation)
• Spec Guaranteed Temperature Range:  10 to 35 °C
• Spec Guaranteed Humidity Range:  85 % RH (without condensation)
• Operating Environment:  Indoor use
• Operating Altitude:  Up to 2,000 m
• Overvoltage Category:  I
• Pollution Degree:  2

Power Source:  Supplied by the LT 443D mainframe
Dimensions:  79 (W) x 41 (H) x 371 (D) mm (excluding projections)
Weight:  Approx. 0.4 kg