NorthStar 941x 用户手册

Rev.  D

Appendix

Appendix

Appendix

Appendix

Page 133

Signal Processing

Signal Processing

Signal Processing

Signal Processing

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Number of Channels:

2

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Frequency Range:

283.5–325.0 kHz

•

 

Tuning Resolution:

< 2 Hz

•

 

Minimum Signal Strength:

1µV/m @ 100bps

•

 

Dynamic Range

> 100 dB

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Adjacent Channel Rejection:

> 50 dB at 1 kHz

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Acquisition Time:

5 seconds, manual command

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15 seconds, automatic warm start

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15 minutes, automatic cold start *

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Noise Blanker:

Predictive variable length

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Signal Detection:

Acquisition via FLL (frequency-locked loop);

tracking via PLL (phase-locked loop)

Data Processing

Data Processing

Data Processing

Data Processing

Demodulation:

MSK (Minimum Shift Keying)

Data Decoding:

Parallel-matched digital filters

MSK Bit Rates:

25, 50, 100, 200 (automatically selected)

Power Requirements

Power Requirements

Power Requirements

Power Requirements

Power Consumption:

2 Watts

Data Ports

Data Ports

Data Ports

Data Ports

DGPS Correction Output Port:

RTCM SC-104 Version 2.0—6 of 8
RS-232-C
9600 or 4800 baud

Environmental

Environmental

Environmental

Environmental

Whip Antenna:
ACU:

Height:

11 inches

Diameter:

2.6 inches

Weight:

1.5 pounds

Antenna:

48-inch fiberglass whip (not supplied)
(Shakespeare 4' #173 loaded, or Radio Shack
#21-934)

Internal Beacon

Receiver

(optional)