:
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2. ;
3. ;
4. ( , , ..)
2.1
. 2.1.
, , , .
.
. 2.1.
( ) ( n+1).
, .
- , ..
, (. 2.2).
, I II (VHF III, UHF IV, V).
:
( );
2- - 3- III-V 1- I- II- ( ).
. 2.2. n+1 .
, , , (, , , ..)
III-V .
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2.2
, - .
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2.3
(ediasat) DMT Group.
DMT . , 2,5G 3G, PSTN, ISDN ADSL, VHF/UHF, .
. 2.3. DMT , . DMT RS485 RS232, . Proxy Server, "DMT", DMT SNMP . Proxy Server . , , , RJ45, .
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. 2.3.
DMT AUGE, RS485 ALGORAB.
HUB- (CN110R) / .
, VHF UHF, dial-up , GSM, 64k 2/.
(. 2.4) web-, . SMS- ( ).
. / .
. 2.4.
, , , , .
-, Auge , , . web- .
AUGE "DMT" .
, , .
2.4
2.4.1 MIB. (Management Information Base -MIB). MIB-II. , MIB , SNMP. MIB-II, MIB . MIB OID MIB (Object Identifier, MIB). MIB (read-only), (read-write).
read-only MIB , , , . read-only . read-only , , .
read-write MIB , . , IP- , Spanning Tree Algorithm, .
SNMP , , MIB . MIB, MIB ( MIB ). , MIB , OID MIB .
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, , . , , . . , , .
SCTE, Hybrid Management Sublayer Commetee . HMS (Hybrid Management Sublayer). SNMP. , . , - MIB (Management Information Base/Blocs).
, , . 2.5. , SNMP (Agent).
. 2.5.
, , . (HUB). , , SNMP . SNMP MIB, , , . SNMP , , , . SNMP .
Ethernet UDP/IP. . SNMP . .
HMS . HMS 004 SNMP , HMS 005 , , . , , HMS , MIB . MIB .
2.4.2 . EMT- (. 2.6). AC6950 (. 2.7):
, ;
RS-485 ;
(AGC);
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- (D/A) , ;
;
Eeprom ;
Flash/RAM .
. 2.6. AC6950 Access
.2.7. - AC6950
-, , - . . 38 / - . RS-485 ( RJ-45).
3. |
3.1 DVB-T
3.2 ()
DVB-T
XX . - . () , . 04.12.2009 . 2009-2015 .. , , , . - , DVB-T DVB- . . 3.1 - .
, DVB-T (EN 300 744) DVB-C (EN 300 429). MPEG-2 MPEG-4/H.264 AVC (Advanced Video Coding) / .
. 3.1.
DVB-T (UHF Tuner) 174-230 470-862 . (36,166 ), COFDM-. :
COFDM: 2, 4 8 ;
: 6, 7 8 ;
: 1/4, 1/8, 1/16 1/32;
: QPSK, 16 QAM, 64 QAM;
;
: 1/2, 2/3, 3/4, 5/6 7/8;
-.
I2C. .
DVB-C (UHF Tuner) 47-862 . (36 ), QAM-. :
16, 32, 64, 128 256 QAM;
;
- .
I2C. . . , : (, , , DVB-T DVB-), , . . . . SMART- SMART- ( ). . - MPEG-2/MPEG-4- (SD) (HD) , , , . H.264/AVC MP@L4 [email protected] (main and high profile) ISO/IEC13818-2 MP@ML MP@HL MPEG-2 MPEG-4 . (DDR), 32- (). 32-, 16- 64, 128, 256 512 200 . : MPEG-2 32 , MPEG-4- 64 ; .
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- (), ( , RGB YPbPr) ( SPDIF). , . (HD) HDMI (High-Definition Multimedia Interface). ( , , . .).
32- RISC-, 266 . . , 32- ( ), 32-, 16- 64, 128, 256 512 200 . MPEG-4 . 16- , (Flash ) : Ethernet-, Common Interface .
:
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SMARTCARD- ;
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(4 ), - .
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SMART- , . , .
, .
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. 3.3.
. 3.4. -