66
Meridian 1
Meridian 1
“P/-” or “SOURCE” is pressed. Top key control “Menu” or “P/-”
key is toggled. (
for 221T1)
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 (
for 201T1)
QPSK, 16 –QAM, Hierarchical modulation (
for 221T1)
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
Frequenc
y
[kHz.]
Start
End
Bandwitdth
FRANCE_VHF
178750
1
6
8000
ITALY_VHF*
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
y
ATV RF input system Aerial or cable via RF connector supports PAL B/G, D/K, I and SECAM B/G, D/K, L/ L’.
Channel Coverage:
Band
Analog channels, Picture Carrier (MHz)
Digital Channels, Center Frequency (MHz)
Low Band
45.25 – 154.25
51.00-156.500
Mid Band
161.25 – 439.25
162.00-442.00
High Band
447.25 – 858.25
450.00-858.00
