SS0607-8
30 September 1988
LESSON 3
MODERN STUDIO TIMING CONCEPTS
TASK
Define the phase relationship between subcarrier and horizontal sync (SC/H),
and describe the problems and solutions of SC/H phase.
CONDITIONS
Given information and illustrations relating to SC/H.
STANDARDS
Demonstrate competency of the task skills and knowledge by correctly
responding to at least 80 percent of the multiple-choice test covering the
phase relationship between subcarrier and horizontal sync (SC/H) and the
problems and solutions of SC/H phase.
REFERENCES
None
Learning Event 1:
DESCRIBE SYSTEMS USED FOR MULTIPLE STUDIO TIMING
1.
The illustration in Figure 3-1 shows a three-studio system in which
the timing of entire source clusters and studios can be changed. This will
allow one studio to feed any other studio in sync time.
2.
This entire system is driven by a dual master reference synchronizing
generator with an automatic changeover switch.
This provides additional
security since each master sync generator is powered from a different
circuit.
The master sync generators can have ovenized crystal oscillator
options for higher frequency stability against temperature variations. An
external frequency reference option allows a rubidium or cesium frequency
standard to be used as the frequency standard, with the internal oscillator
as a backup.
3.
Each of the three studios is similar to the one just mentioned. The
studios have dedicated source devices and additional cameras and/or video
tape machines that can be assigned.
A routing switcher is used to assign
these sources to the studios.
Every studio output is fed to a routing
switcher input for assignment as a timed input to another studio. Every
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