19
CIRCUIT OPERATING MANUAL
STA R T
Bi t CLK
P A C K E T
D7
E R R O R
First bit of the packet
Data Parity
Parity
Useful Data
1 Packet
RS0 = 0
RS0 = 1
Feature 12. Serial Data Output Timing
Serial Output Timing
(2) Related with LNB.
1) LNB power and 22khz Tone Pulse
The power supplied to LNB sends the 22Khz Tone signal that is used in horizontal(18V), vertical(13V) and frequency
Band and Diseqc Command.
UNI-CI Model uses LNBPIO series that are exclusive IC for the LNB from ST company.
Control signal is sent through 74HC574(IC5and IC6) from CPU.
Chart 6. LNB Control signals
22KHZ Tone Spec is
Function
High
Low
H/V
Horizental(18v)
Vertical (13v)
22Khz-ON
22Khz ON
22Khz OFF
LNB-ON
LNB ON
STD BY
AUX/IRD
IRD MODE
AUX MODE
(Loop Through)
(External SAT)
Feature 13. 22Khz Tone Pulse
Summary of Contents for DSD-9250E
Page 2: ...1...
Page 17: ...16 CIRCUIT OPERATING MANUAL Feature 9 EMI Interface Timing...
Page 41: ...40 SCHEMATIC DIAGRAM...
Page 42: ...41 SCHEMATIC DIAGRAM...
Page 43: ...42 SCHEMATIC DIAGRAM...
Page 44: ...43 SCHEMATIC DIAGRAM...
Page 45: ...44 SCHEMATIC DIAGRAM...
Page 46: ...45 SCHEMATIC DIAGRAM...
Page 47: ...46 SCHEMATIC DIAGRAM...
Page 48: ...47 SCHEMATIC DIAGRAM...
Page 49: ...48 SCHEMATIC DIAGRAM...
Page 50: ...49 SCHEMATIC DIAGRAM...
Page 51: ...50 SCHEMATIC DIAGRAM...
Page 52: ...51 PARTS PLACEMENT ARRANGEMENT...
Page 53: ...52 PCB PATTERN...
Page 54: ...53 PCB PATTERN...
Page 55: ...54 EXPLODED VIEW...
Page 56: ...PRINTED DATE Apr 2003...
