National Instruments NI 9467, Начало работы, Страница: 9 / 13

General Characteristics
Signal type L1 frequency; GPS C/A code
Datum WGS-84
RF GPS signal frequency 1575.42 MHz
Recommended signal strength at SMA
[1] -135 dBm to -120 dBm
Max RF power at input 3 dBm
Input impedance 50 Ω, nominal
MTBF 2,234,702 h at 25 °C; Bellcore Issue 2, Method 1, Case 3,
Limited Part Stress Method
PPS accuracy
[2]
±100 ns, > 99% typical
1
Higher signal strength might saturate the receiver and degrade performance.
2
For the best timing accuracy performance, ensure that the GPS antenna has a clear
view of the sky. Refer to the Antenna Installation section for more details.
GPS Antenna Connector Characteristics
GPS antenna connector type SMA female
DC voltage output for active antenna +5 V ± 10%
Max. current output 30 mA
Minimum current for antenna presence detection 6 mA typical, 9.5 mA max
Over-voltage protection ± 30 VDC
Power Requirements
Power consumption from chassis
Active mode 150 mA maximum
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NI-9467 Getting Started