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VP310 数据表(PDF) 17 Page - Mitel Networks Corporation

部件名 VP310
功能描述  Satellite Channel Decoder
PDF  31 Pages
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制造商  MITEL [Mitel Networks Corporation]
网页  http://www.mitel.com
标志 MITEL - Mitel Networks Corporation

VP310 数据表(HTML) 17 Page - Mitel Networks Corporation

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VP310
PRELIMINARY DATA
17
Enable VP310 : Program CONFIG
Reg 127 = 136 (88hex)
Program tuner via GPP in 'pass through mode'
open port with Reg 20 = 64 (40hex)
send TUNER DATA via I2C bus (5 bytes).
close port with Reg 20 = 0
Reset VP310 to default register settings
Reg 21 = 128 (80hex)
Set AGC_SL (if required)
Initialise registers: reg 49 = 50 (32hex);
reg 86 = 20 (14hex); reg 87 = 18 (12hex);
reg 88 = 2; reg 89 = 1; reg 90 = 0;
reg 91 = 0; reg 92 = 0; reg 93 = 0.
DiSEqC mode
eg Horizontal with 22kHz on:
Reg 22 = 65 (41hex)
Signal input - Symbol rate
eg 27.5 MBaud:
Reg 23 = 27 (1Bhex) DEFAULT state
Reg 24 = 128 (80hex) DEFAULT state
Viterbi code rate
eg V_IQ swap not set, CR = 3/4:
Reg 25 = 4 (4hex)
QPSK control
eg DVB : roll-off = 0.35:
Reg 26 = 0 DEFAULT state
GO
Release reset state to start signal capture
Reg 27 = 1
Figure 13. Initialisation sequence in DVB mode.



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