MODULE OVERVIEW
The 5450 Digital Video Frame Synchronizer accepts a serial digital signal for frame synchronization and timing with full 10-bit processing. Four serial outputs, one active loopthrough and two composite monitors outputs are provided, in addition to a reference
input.
The serial input can be non-synchronous, making the 5450 ideal for incoming satellite
feeds, studio signals and for timing sources into a router or switcher. The serial output
timing signal can be set anywhere within one frame of the selected input reference, which
can be the module’s external BNC reference or the frame’s master timing reference.
A composite monitor output is provided through two identical BNCs on the rear of the
5450 module to allow for signal monitoring.
Upon loss of signal or detection of TRS or EDH errors, the 5450 can be set for an interpolated field freeze or blanking to black until the signal is recovered. Internal black and
color bar generators are present on the module. In freeze mode, audio can be muted or
passed as desired. Additionally, a field or frame freeze can be triggered manually or with
GPIs.
As illustrated in the block diagram on the following page, the serial input to the module
enters a receiver circuit where cable equalization is processed and reported. The signal
then moves through a reclocking and EDH detection circuit where the serial steam is
deserialized, descrambled and EDH monitor detection is performed.
The serial output is sent through cable drivers to the reclocked Serial Out BNC. The
10-bit data stream passes through frame synchronizer memory circuitry where it can be
delayed to one frame. Memory control in this section detects TRS and/or EDH errors and
uses them to determine if an automatic freeze should be performed.
The output from the Frame Synchronizer circuitry is then passed to timing and interpolation circuitry which generates output timing and detects presence of audio ancillary data.
This section also generates the internal black and color bars signals which can be inserted
in the data stream upon loss of signal if desired.
This data stream is then sent to a serial encoder and serializer and EDH is inserted and
updated before going to the four serial output BNCs. The same output is also sent to the
composite encoder where the data stream is converted to composite for viewing on the
monitor outputs.
Power is derived from the ± 12 volt frame power. It is regulated to +5 volts for the module
by on-board regulator. The module is fused with a resettable fuse device. If the 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.
Module configuration can be set remotely or locally. The status can be read from the
remote interfaces (Avenue PC or a Touch Screen) or from the LEDs on the front of the
module as explained later in this data pack.
Model 5450 Digital Video Frame Synchronizer
5450-2