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Functional Overview
2–4
SPG 422 Service Manual (B034000 and above)
Audio Signals
There are three different formats of serial audio signals available from the rear
panel: AES/EBU from BNC connectors and from XLR connectors plus
embedded audio in the serial digital video signal. If any audio parameters
change, then all of the audio outputs are affected. Different audio tones and
levels are available for each channel. Up to four channels are available. Turn
them on or off and change the tone and levels independently.
Although the output frequency and amplitudes are the same, the AES and
embedded audio are essentially generated by separate generators. Therefore,
there is no consistent phase relationship between the two with respect to audio
tones. The digital audio sample frames are synchronized with the video frame.
Serial Signals (Option 2 only)
If Option 2 is not installed then these outputs are plugged. Both outputs have
identical signals. There are a wide variety of signals from which to choose. The
timing offset relative to the genlock is selectable. The standard is selectable and
can be independent of the genlock standard. If the standard is different from the
genlock, then it takes its timing from the internal oscillator that is “clock-locked”
to the genlock signal. Therefore, the signal will be clock-locked but not
frame-locked to the genlock reference signal.
GENLOCK Reference
BLACK (1 or 2)
Genlock
REFERENCE
DIGITAL TEST
SIGNALS
Genlock
BLACK (3–6) Genlock
–2 Fields
–8 1/2 Lines
+2 Fields
+8 1/2 Lines
DIGITAL BARS
and BLACK
Genlock
–2 Fields
–8 1/2 Lines
+2 Fields
+8 1/2 Lines
–1 Fields
–8 1/2 Lines
+1 Fields
+8 1/2 Lines
–2 Fields
–8 1/2 Lines
+2 Fields
+8 1/2 Lines
–1 Fields
–8 1/2 Lines
+1 Fields
+8 1/2 Lines
Timing Range Referenced to
Figure 2–3: Illustration of SPG 422 timing
Содержание SPG 422
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