Ensemble Designs 6040 Tracking Audio Delay - Manual (Page 2)

MODULE OVERVIEW
The 6040 Tracking Audio Delay module provides both bulk and variable delay to ensure
proper synchronization between picture and sound. The 6040 can track up to three video
synchronizer modules in the Avenue system and will respond when a frame is dropped or
replaced to provide accurate audio tracking. Delay settings are dynamically adjusted so
that the 6040 will "shrink" or "stretch" the audio as required over a period of 6 seconds
until the new settings are in effect.
As shown in the block diagram on the next page, two input sources, analog or digital, are
available via local or remote control. The digital input is sample rate converted allowing
for unlocked and/or off frequency digital sources to be used with 24-bit audio precision.
The digital input can also be used for non-audio sources such as AC-3 or Dolby E. In this
case the sample rate converter is by-passed allowing for full 24-bit precision data.
The module locks its audio to a Phase Lock Loop (PLL). The PLL can lock to the digital
input or an external reference as long as the signals are 48 kHz. If no reference is
available, or if desired by the user, the module can lock to an internal crystal.
The module incorporates three outputs; an analog output that can be switched between
delayed and non-delayed audio, an undelayed AES output (two outputs), and a delayed
AES output (six outputs).
Status indicators include indication of a valid external reference, error detection for the
AES input, error indication for any tracking errors, and indication of the bulk delay value.
Control of the module can be from one of the remote Avenue options or from the local
controls located on both the front of the module and on the inside of the module. Local
controls include bulk delay, input selection, analog output mode (delayed or non-delayed),
reference mode, digital reference level, analog input reference level, and analog output
reference level.
The on-board microprocessor communicates with the frame for remote control via the
Avenue System Control module if installed. Module ID (slot location, software version and
board revision) and status information can be monitored by the frame System Control
module and read using the optional interfaces available. Alarms can also be enabled if
desired.
Power is derived from the ± 12 volt frame power. It is regulated to the required voltages
for the module by on-board regulators. The module is fused with resettable fuse devices. If
a fuse opens due to an overcurrent condition, the module will lose power. After pulling the
module, the fuse will reset automatically requiring no replacement fuse.
Model 6040 Tracking Audio Delay
6040-2