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(yè)數(shù)： 40/49頁(yè)
文件大?。?/td> 340K
代理商： HSP50210
3-40
TABLE 37. ACQUISITION/TRACKING CONTROL REGISTER
DESTINATION ADDRESS = 23
BIT
POSITION
FUNCTION
DESCRIPTION
31-16
Not Used
No programming required.
15
Reserved
Set to 0 for proper operation.
14
False Lock Detect
Enable
This bit enables the false lock detection during the verify state of state machine controlled acquisition.
The overflow of the False Lock Accumulator before the Integration Counter forces the false lock state. If
disabled, the overflow of the False Lock Accumulator has no effect on state machine operation.
0 = Disable False Lock.
1 = Enable False Lock.
Note: The false Lock Detector is designed for false lock detection on square wave data. For shaped
waveforms false lock detection should be disabled or frequency error should be used.
13
Frequency Sweep
Mode
This bit selects whether stepped or continuous frequency sweep mode is used (see Lock Detector Sec-
tion).
0 = Stepped Frequency Sweep (provided for microprocessor controlled acquisition mode).
1 = Continuous Frequency Sweep.
12-9
Verify State Length
These bits set the number of integration cycles over which carrier lock must be maintained before the
Lock State is declared. The verify state is used to make sure that lock detection was not the result of noise
or false lock. The 4-bit value programmed here sets the verify state from 0 to 15 Integration Periods.
8-5
False Lock Sweep
These bits set the duration of forced frequency sweep before returning to the acquisition state. When
continuous frequency sweep mode is selected, the programmed number represents the number of Lock
Accumulator integration cycles to sweep before returning to the acquisition state. In stepped frequency
sweep mode, the number represents the number of loop filter compute cycles over which to enable the
sweep input to the lag accumulator.
4
Lock Detector Control
This bit selects whether the acquisition/tracking process is controlled externally by a microprocessor or
internally by the state machine. If microprocessor control is chosen, the lock detect accumulator
integrates for the programmed period of time and ignores accumulator roll over, if any. The Lock Detector
Accumulator halts after each Integration Period and waits to be restarted by the microprocessor. In
addition, the microprocessor must select the acquisition/tracking parameters, as well as enable the
Frequency Sweep Block.
0 = Microprocessor Control.
1 = Internal State Machine Control.
3
Microprocessor
Acquisition/Track
Select
0 = Track Parameters Chosen.
1 = Acquisition Parameters Chosen.
2
Microprocessor Lock
This bit controls the state of the lock bit (STATUS6) in the status output STATUS6-0 (see Output Select
Section). In addition, this bit sets the internal state machine to the locked state when Lock Detector
Control is switched from microprocessor control to state machine control. See Table 46 for the STATUS
bit information.
1
Reserved
Set to zero for proper operation.
0
Microprocessor
Frequency Sweep
Enable
This bit is used to enable the output of the Frequency Sweep Block to the lag path of the Symbol Tracking
Loop Filter. This bit is only used under microprocessor control of the Lock Detector.
HSP50210
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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
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HSP50214 制造商:INTERSIL 制造商全稱:Intersil Corporation 功能描述:Programmable Downconverter
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