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Subject:
Data Sheet Concerned:
Supplement:
Edition:
Changes to the previous revision are indicated by change bars. Please note section 2.1.1.2., which is of importance
for the use of the VCT-I F1 in combination with NICAM-audio modes.
1. VCT 49xyI Version History
1.1. Field Problems
Field test results are available for the VCT 49xyI versions C7 to D5. The versions F1 and F2 are intended to solve all
listed field problems.
Table 1–1: History of field problems
No.
Field Problem
FP01 Streaky Noise
FP02 Modulator Imbalance
FP03 FM Modulation
FP04 Color Clipping
FP05 Closed Caption Performance
FP06 VSP-AGC performance
FP07 Sync/H-PLL performance
1.2. Functional Problems
For a more detailed description and workarounds of the functional problems please refer to the list of the particular
VCT 49xyI version in the next sections. The problem numbers are consistent throughout the whole document. The
versions F1 and F2 are intended to solve the remaining problems.
Table 1–2: History of functional problems
No.
Functional Problem
18
Vertical Synchronisation
26
Picture Frame Blanked
34
Reset after Read
CIRCUIT DESCRIPTIONS
Advance Information Supplement
C7
D2
D4
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
C6
C7
D2
x
x
x
x
x
x
Additional Info for VCT 49xyI
VCT 49xyI
6251-573-1AI, Edition Feb. 18, 2004
Version History
Dec. 16, 2004
D5
F1
F2
Comment
x
Problem solved in F1
x
Problem solved in F1
x
Problem solved in F1
x
x
Problem to be solved in F2
x
Problem to be solved in F1
x
x
Problem to be solved in F2
x
x
Problem to be solved in F2
D4
D5
F1
F2
Comment
Problem solved in D2
Problem solved in D2
Problem solved in D2
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