Subject:
Data Sheet Concerned:
Supplement:
Edition:
Advance Information Supplement
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.
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 1–1: History of field problems
No.
Field Problem
C7
D2
D4
D5
F1
F2
Comment
FP01
Streaky Noise
x
x
x
x
Problem solved in F1
FP02
Modulator Imbalance
x
x
x
x
Problem solved in F1
FP03
FM Modulation
x
x
x
x
Problem solved in F1
FP04
Color Clipping
x
x
x
x
x
Problem to be solved in F2
FP05
Closed Caption Performance
x
x
x
x
Problem to be solved in F1
FP06
VSP-AGC performance
x
x
x
x
x
Problem to be solved in F2
FP07
Sync/H-PLL performance
x
x
x
x
x
Problem to be solved in F2
Table 1–2: History of functional problems
No.
Functional Problem
C6
C7
D2
D4
D5
F1
F2
Comment
18
Vertical Synchronisation
x
x
Problem solved in D2
26
Picture Frame Blanked
x
x
Problem solved in D2
34
Reset after Read
x
x
Problem solved in D2
Additional Info for VCT 49xyI
VCT 49xyI
6251-573-1AI, Edition Feb. 18, 2004
Version History
Dec. 16, 2004
CIRCUIT DESCRIPTIONS
