Philips 231T1SB/00, Руководство по обслуживанию

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Meridian 1 Meridian 1
y Recovery form DPM
Power & function recover when both H & V syncs are detectded.
y
Standby 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.
y Recover from Standby Power & function recovers when RC & Top key control “Standby” or “P/-”
or “SOURCE” is pressed.
3.2 Reception
3.2.1 RF Signal Requirements
y DTV RF input system (DTV only)
¾ Frequency range VHF: 174 to 230MHz, UHF: 470 to 862 MHz
¾ Modulation COFDM
¾ Input impedance 75Ohm
¾ Constellation QPSK, 16 –QAM, 64 – QAM, Hierarchical modulation
¾ Tuner Bandwidth 7 MHz and 8 MHz
¾ FFT Mode 2 K / 8 K
¾
Guard Interval 1/4, 1/8, 1/16 or 1/32
¾ FEC code rate 1/2, 2/3, 3/4, 5/6 or 7/8
y The iDTV shall be able to find all DVB-T modulated multiplexes whose center frequencies, F are located
+/-500Khz on a grid:(for Europe)
¾ For 7 and 8 MHz bandwidth: F =7*N + 2.5 MHz, where N: 15<=N<=32
¾ For 8 MHz bandwidth: F =8*M + 2 MHz, where13<=M<=28 and 59<=M<=107. And on the grid: (for Italy)
Frequency Plan Start Frequency [KHz.] Start End Bandwidth
FRANCE_VHF 178750 1 6 8000
ITT 177500 1 7 7000
* Not Arithmetic
# define ITALY_VHF
{ 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’}} }
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 l/- 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