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5.6 Nucleus 905: System Video VBI Loop
This nucleus tests the components on the video signal
path:
• The VIP
• The VSM
• The Host Decoder
The video CVBS signal is routed to the output of the
analogue board where it will be looped back by means of
an external cable.
Remark: this test is only successful if nucleus 121 is
carried out first.
NUCLEUS 905: SYSTEM VIDEO VBI LOOP
SCART AUX
ANALOGUE BOARD
1954
connector
1601
connector
7500
DIGITAL BOARD
VIP
VIP_ICLK: 27MHz
EMPRESS
Fig. 14
SCART TV
7507
STV6410
1954
connector
1601
connector
7200
STI 5508
7403
7100
VSM
5.7 Nucleus 906: Video User Dealer Loop
Nucleus for testing the components on the video signal
system path:
• The VIP
• The video encoder
• The VSM
• The host decoder
• The analogue board
On the analogue board, the video signal is internally
routed back to the digital board.
NUCLEUS 906: VIDEO USER DEALER LOOP
ANALOGUE BOARD
STV6410
1954
connector
1601
connector
DIGITAL BOARD
7500
VIP
VIP_ICLK: 27MHz
EMPRESS
Fig. 15
DRX-1
7507
1954
connector
1601
connector
7200
STI 5508
7100
7403
VSM
39
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