Reception - Philips 231T1SB/00 Service Manual

66 66
Meridian 1 Meridian 1
Recovery form DPM
Standby
Recover from Standby

3.2 Reception

3.2.1 RF Signal Requirements
DTV RF input system (DTV only)
Frequency range
Modulation
Input impedance
Constellation
Tuner Bandwidth
FFT Mode
Guard Interval
FEC code rate
The iDTV shall be able to find all DVB-T modulated multiplexes whose center frequencies, F are located
+/-500Khz on a grid:(for Europe)
For 7 and 8 MHz bandwidth: F =7*N + 2.5 MHz, where N: 15<=N<=32
For 8 MHz bandwidth: F =8*M + 2 MHz, where13<=M<=28 and 59<=M<=107. And on the grid: (for Italy)
Frequency Plan
FRANCE_VHF
ITT
* Not Arithmetic
# define ITALY_VHF
And on the grid: (for Australia)
In the DVB-T profile, the iDTV supports, besides the European Grid, Australian grid. There, the center frequency
F is located +/- 500 KHz on a grid:
For VHF: F = N*7 + 2.5; for 25<=N<=32
For UHF: F = N*7 + 4.5; for 72<=N<=114
Power & function recover when both H & V syncs are detectded.
The TV enters "TV standby mode" when it is turned off by RC "Standby / Power"
key or SLEEP TIMER functions is activated or no TV signal input for 30 seconds.
Power & function recovers when RC & Top key control "Standby" or "Program +/-"
or "SOURCE" is pressed.
VHF: 174 to 230MHz, UHF: 470 to 862 MHz
COFDM
75Ohm
QPSK, 16 –QAM, 64 – QAM, Hierarchical modulation
7 MHz and 8 MHz
2 K / 8 K
1/4, 1/8, 1/16 or 1/32
1/2, 2/3, 3/4, 5/6 or 7/8
Start Frequency [KHz.]
178750
177500
Start End Bandwidth
1 6
1 7
{ 7, 7, {{1, 177500, 7000, 'D'}\
{ 2, 186000, 7000, 'E'}, \
{ 3, 194500, 7000, 'F'}, \
{ 4, 203500, 7000, 'G'}, \
{ 5, 212500, 7000, 'H'}, \
{ 6, 219500, 7000, 'H1'}, \
{ 7, 226500, 7000, 'H2'}} }
8000
7000