GS4910B GENNUM [Gennum Corporation], GS4910B Datasheet - Page 41

• Manufacturer Part Number: GS4910B
• Description: HD/SD/Graphics Clock and Timing Generator with GENLOCK
• Manufacturer: GENNUM [Gennum Corporation]

Figure 3-2
operation. Assuming a crystal reference of +/-100ppm, in Free Run mode the
frequency of the output clock and timing signals will be as accurate as the crystal.
In Genlock mode the frequency will be as accurate as the input reference
regardless of the crystal accuracy. In Freeze mode, the frequency of the output
clock and timing signals will be maintained to within +/- 2ppm.
Figure 3-2: Output Accuracy and Modes of Operation
36655 - 2
74.25 MHz
+100ppm
-100ppm
+
- t
t
NOTES:
1.
2. Diagram not to scale.
Free Run
Reference
No Input
t represents the temperature variability of the crystal
summarizes the differences in output accuracy in each mode of
April 2006
t
Genlock
Reference
Applied
Assumption: Reference
XTAL is 27MHz+/-100ppm
Reference
Freeze
Lost
GS4911B/GS4910B Data Sheet
+2ppm
- t
+ t
-2ppm
Time
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