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參數(shù)資料
| 型號(hào)： | HSP50210 |
| 廠商： | HARRIS SEMICONDUCTOR |
| 元件分類： | 通信及網(wǎng)絡(luò) |
| 英文描述： | Digital Costas Loop(數(shù)字Costas鎖相環(huán)) |
| 中文描述： | SPECIALTY TELECOM CIRCUIT, PQCC84 |
| 文件頁數(shù)： | 36/49頁 |
| 文件大小： | 340K |
| 代理商： | HSP50210 |
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3-36
8-5
AFC Gain Mantissa
(Track)
Sets Frequency Error Gain. Format same as lead gain mantissa (see Table 24). Bit position 11 is the
MSB.
4-0
AFC Gain Exponent
(Track)
Sets Frequency Error Gain. Format same as lead gain exponent (see Table 24). Bit position 4 is the MSB.
TABLE 27. CARRIER LAG ACCUMULATOR INITIALIZATION CONTROL REGISTER
DESTINATION ADDRESS = 13
BIT
POSITION
FUNCTION
DESCRIPTION
N/A
Carrier Lag
Accumulator
Initialization
Writing this address initializes the lag accumulator with the contents of the 4 Microprocessor Interface
Holding Registers at the start of the next Carrier Loop Filter Computation cycle. The contents of the hold-
ing registers should not be changed until after the start of a new compute cycle, since the current contents
of the holding registers are loaded at the compute cycle start. The Microprocessor Interface can be used
to read an Internal Status Register which signals when the lag accumulator load is complete (see Micro-
processor Interface Section). The contents of the holding registers are loaded into the 32 MSBs of the
lag accumulator and the 8 LSBs are zeroed.
It is good practice to load the LAG Accumulators at the very end of a configuration load sequence.
TABLE 28. SYMBOL TRACKING LOOP CONFIGURATION CONTROL REGISTER
DESTINATION ADDRESS = 14
BIT
POSITION
FUNCTION
DESCRIPTION
31-16
Not Used
No programming required.
15-13
Reserved
Reserved. Set to 0 for proper operation.
12-11
Sampling Error Shift
Factor
The sampling error shifter is provided to left shift the sampling error to full scale before input to the Symbol
Tracking Loop Filter. The magnitude of the sampling error varies with the number of symbol decision levels,
and a left shift of 1 to 4 places is provided as required by modulation order. Suggested settings are provided
below:
00 = x2 2 levels on each rail (BPSK, QPSK).
01 = x4 4 levels on each rail (8 PSK).
10 = x8 8 levels on each rail.
11 = x16 16 levels on each rail.
Note: Saturation is provided in case of overflow.
10-9
Modulation Order
Select
These bits set the threshold levels used by the symbol decision blocks in the Sampling Error detector. The
end-symbol samples on either the I or Q processing path are compared against the selected threshold set
to determine the expected symbol value used in calculating the transition midpoint. The threshold levels
can be set for up to 16ary signals on both the I and Q processing path. The decision thresholds are set as
given below.
00 = 2ary signal (Use this setting for BPSK, QPSK, and OQPSK signals).
01 = 4ary signal.
10 = 8ary signal.
11 = 16ary signal.
The threshold levels are determined by equally dividing up the signal range by the order of the signal. For
example, a 2ary signal would divide the
~
1.0 to -1.0 signal range by two forcing threshold at 0.0. A 4ary
signal would have thresholds at:
-0.5, 0, and +0.5.
TABLE 26. FREQUENCY SWEEP/ AFC LOOP CONTROL REGISTER (Continued)
DESTINATION ADDRESS = 12
BIT
POSITION
FUNCTION
DESCRIPTION
HSP50210
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PDF描述 |
|---|---|
| HSP50214VC | Programmable Downconverter |
| HSP50214VI | Programmable Downconverter |
| HSP50214 | Programmable Downconverter |
| HSP50215VC | Digital UpConverter |
| HSP50215VI | Digital UpConverter |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| HSP50210JC-52 | 功能描述:上下轉(zhuǎn)換器 COSTAS DEMODULATOR,84 PLCC,52MHZ,COMM RoHS:否 制造商:Texas Instruments 產(chǎn)品:Down Converters 射頻:52 MHz to 78 MHz 中頻:300 MHz LO頻率: 功率增益: P1dB: 工作電源電壓:1.8 V, 3.3 V 工作電源電流:120 mA 最大功率耗散:1 W 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PQFP-128 |
| HSP50210JC-52Z | 功能描述:上下轉(zhuǎn)換器 COSTAS DEMODULATOR 84 PLCC 52MHZ COM RoHS:否 制造商:Texas Instruments 產(chǎn)品:Down Converters 射頻:52 MHz to 78 MHz 中頻:300 MHz LO頻率: 功率增益: P1dB: 工作電源電壓:1.8 V, 3.3 V 工作電源電流:120 mA 最大功率耗散:1 W 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PQFP-128 |
| HSP50210JI-52 | 功能描述:上下轉(zhuǎn)換器 COSTAS DEMODULATOR,84 PLCC,52MHZ,IND RoHS:否 制造商:Texas Instruments 產(chǎn)品:Down Converters 射頻:52 MHz to 78 MHz 中頻:300 MHz LO頻率: 功率增益: P1dB: 工作電源電壓:1.8 V, 3.3 V 工作電源電流:120 mA 最大功率耗散:1 W 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PQFP-128 |
| HSP50210JI-52Z | 功能描述:上下轉(zhuǎn)換器 COSTAS DEMODULATOR 84 PLCC 52MHZ IND RoHS:否 制造商:Texas Instruments 產(chǎn)品:Down Converters 射頻:52 MHz to 78 MHz 中頻:300 MHz LO頻率: 功率增益: P1dB: 工作電源電壓:1.8 V, 3.3 V 工作電源電流:120 mA 最大功率耗散:1 W 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PQFP-128 |
| HSP50214 | 制造商:INTERSIL 制造商全稱:Intersil Corporation 功能描述:Programmable Downconverter |
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