PT5300 |
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1 PT5300 Master Sync Generator
1.1 Introduction
The PT5300 HD-SD Master Sync Generator is specially designed to fit into HD as well as SD digital and mixed
digital/analog video installations, and it provides signals for synchronization, fault finding and checking of the entire
digital chain. Because of its many parallel outputs, the PT5300 is ideal for supplying the video production facility with
all commonly-used test signals for alignment, but also generates -by patterns.
The basic generator is available as an SD or HD-SD gen-lockable sync with 2 Black Burst outputs. In the HD-SD
version it has furthermore 4 Tri-Level sync outputs available. A dual AES/EBU digital audio generator is also included
in the base units.
The DK-Technologies PT5300 can be assembled at the factory with a number of optional modules that tailor it to specific
applications.
Up to two Quad Test Signal generators can be added to the basic unit, making up to 8 different HD or SD SDI test
signals with audio tones available at a time. The HD-SD SDI generator is switchable between 625 and 525 lines and
the various HD formats, and can superimpose three lines of text on the video signals. With complex test patterns, the
text is automatically placed in black text fields.
The PT5300 is gen-lockable to a traditional Black Burst signal, but can also be locked onto a 5MHz or 10MHz
continuous wave. It can even lock onto a 525-line video signal and still generate PAL, 625-line SD-SDI signals and
HD SDI signals in the major parts of formats.
Each of the outputs can be individually timed: SD-SDI signals can be timed in steps of 37 ns over a
±
1 field range;
HD-SDI and Tri-Level Sync signals in steps of 6.7 ns, the analog Black Bursts and test pattern outputs are timeable
in steps of 0.5
◦
of subcarrier over a
±
4 field sequence for PAL and
±
2 field sequence for NTSC.
The stability of the internal reference oscillator ensures accurate signals when the PT5300 is acting as a standalone
reference generator.
AES/EBU digital audio is available on both XLR and BNC connectors. The generator module has two built-in
generators, which can be programmed independently with silence or with tones that include signals with audible
left/right indication. The AES/EBU output signals are always locked both to the 525-line and 625-line outputs. In multi-
standard operations, this permits direct connection between AES/EBU generators in 525-line and 625-line
environments. A separate word-clock signal is available on a BNC connector.
1.2 Applications
The PT5300 can be used in a multitude of different applications, e.g. delivering signals for a video switcher, as a master
and as backup Sync Pulse Generator (SPG) and as a general video signal generator.
In small studios and in OB-vans it can work as an SPG while also delivering test signals at the same time. It also
operates in dual redundant configurations when used with an PT5211 Changeover Unit. Built-in fault detection
circuitry automatically switches from main to backup to keep disruptions to a minimum.
In digital distribution networks where data compression is used, a stationary test signal will not reveal if the line is in a
“freeze” mode. A moving bar added to the standby pattern will show if the line is open and if the time and date
appears in the pattern, this is a good indication that the line is not frozen.
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