- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄359228 > MT312T-Y (Marktech Optoelectronics) 2x4mm Rectangular LED Lamps PDF資料下載
參數(shù)資料
| 型號： | MT312T-Y |
| 廠商： | Marktech Optoelectronics |
| 英文描述： | 2x4mm Rectangular LED Lamps |
| 中文描述： | 2x4mm矩形發(fā)光二極管 |
| 文件頁數(shù)： | 24/90頁 |
| 文件大?。?/td> | 318K |
| 代理商： | MT312T-Y |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁當(dāng)前第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁第37頁第38頁第39頁第40頁第41頁第42頁第43頁第44頁第45頁第46頁第47頁第48頁第49頁第50頁第51頁第52頁第53頁第54頁第55頁第56頁第57頁第58頁第59頁第60頁第61頁第62頁第63頁第64頁第65頁第66頁第67頁第68頁第69頁第70頁第71頁第72頁第73頁第74頁第75頁第76頁第77頁第78頁第79頁第80頁第81頁第82頁第83頁第84頁第85頁第86頁第87頁第88頁第89頁第90頁
MT312
Tuner Control
24
4 Tuner Control
4.1 Simple Channel Change Sequence
If the MT312 is running, to change channel keeping
the same signal conditions, it is only necessary to
change the tuner data and possibly the DiSEqC
data. NO reset is necessary.
4.2 Channel Change Sequence with a new
Symbol Rate
If the MT312 is running, to change channel and
Symbol rate but not Viterbi coding rate, change the
tuner data and possibly the DiSEqC
data and
Symbol rate. NO reset is necessary.
4.3 Channel Change Sequence with Search
Mode
If the signal parameters are unknown, it is possible to
instruct the MT312 to
fi
nd a digital signal and report
the parameters found. Registers 24 and 25 are
programmed with the expected range(s) and the
search mode bit SYM RATE[B15] is set high. A code
rate search is forced by programming more than one
bit in VIT MODE (26) register. The IQ spectrum
phase can be automatically determined by setting bit
7 in the VIT MODE (26) register.
Note: code rate 6/7 is not searched for DVB mode.
If a signal with the speci
fi
ed symbol rate range (or
ranges) is not found in the frequency range
searched, a QPSK Baud End interrupt (Bit B6, QPSK
INT L (2)) is issued.
When the MT312 QPSK section has locked to the
signal, this is indicated in register (6) by QPSK STAT
H[B0] = 1. The symbol rate found can be read from
registers (123 - 124) MONITOR, provided the
register (103) MON CTRL = 3. The tolerance of the
result is ±0.25%. The 14 MSBs of this result
(discarding two LSBs) may be written as the 14 LSBs
of the 16-bit register pair (23 and 24) SYM RATE in
the non-search mode for re-acquisition of the same
channel.
The FEC is locked to the signal, when the Byte Align
lock in FEC STATUS[B2] = 1. Then the code rate
found can be read from FEC STATUS[B6-4], see
register 6 49 for details.
Figure 16 - Simple channel change sequence
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
DiSEqC mode
eg Vertical with 22kHz on:
Reg 22 = 1 (01hex)
GO
Re-acquire signal
Reg 27 = 1
Figure 17 - Channel change sequence with new
Symbol rate, DVB mode
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
DiSEqC mode
eg Horizontal with 22kHz on:
Reg 22 = 65 (41hex)
Signal input - Symbol rate
eg 22.0 MBaud:
Reg 23 = 22 (16hex)
Reg 24 = 0
Viterbi code rate
eg V_IQ swap not set, CR = 5/6:
Reg 25 = 8 (8hex)
GO
Re-acquire signal
Reg 27 = 1
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MT3371BN | Wide Dynamic Range DTMF Receiver |
| MT3371BS | Wide Dynamic Range DTMF Receiver |
| MT3371BNR | Wide Dynamic Range DTMF Receiver |
| MT3371BSR1 | Wide Dynamic Range DTMF Receiver |
| MT3371BSR | Wide Dynamic Range DTMF Receiver |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MT313024 | 制造商:TE Connectivity 功能描述: |
| MT3130C4 | 制造商:TE Connectivity 功能描述: |
| MT3133-Y | 制造商:MARKTECH 制造商全稱:Marktech Corporate 功能描述:Standard 10mm LED Lamps |
| MT3146-Y | 制造商:MARKTECH 制造商全稱:Marktech Corporate 功能描述:1X5 RECTANGULAR LED LAMPS |
| MT3149 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:六路閃燈IC，可選外圍元件改閃燈變順序及狀態(tài)。 |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。