EndRun Sonoma N12, Руководство пользователя

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S o n o m a U s e r M a n u a l 147
"Smarter Timing Solutions"
Appendix
H
Specifications
GPS Receiver:
EndRun GPS Timing Receiver (Started shipping in June 2017).
L1 Band – 1575.42 MHz.
12 Channels, C/A Code.
Single-satellite mode and dynamic-platform mode (shipboard only).
15 dB minimum gain at receiver input.
Timing Receiver Autonomous Integrity Monitoring (TRAIM).
Proprietary GPS sub-frame error checking and filtering.
Antenna:
TNC jack on rear panel, Zin = 50Ω, Antenna Power = +5V.
In35 dB gain LNA with bandpass filter for out-of-band interference rejection.
Rugged, all-weather housing capable of operation over –40°C to +85°C temperature extremes
Mounting via 18” long, 3⁄4” PVC pipe with stainless steel clamps.
50’ low-loss RG-59 downlead cable standard.
Extension cables and low noise pre-amplifiers are available as options.
System Oscillator:
TCXO is standard (2.5 x 10
-6
over -20° to 70° C).
Option: OCXO (4x10
-9
over 0 to 70° C).
Rubidium (1x10
-9
over 0 to 70°C).
Stratum 1 Holdover Performance: 24 Hours - TCXO
35 Days - OCXO
140 Days - Rubidium
Time to Lock:
< 5 minutes, typical (TCXO).
< 10 minutes, typical (OCXO).
Server Performance and Synchronization Accuracy:
GPS Receiver Accuracy: <30 nanoseconds RMS to UTC(USNO) when locked.*
ΝTP Timestamp Accuracy: <10 microseconds @ 7500 requests/second.
NTP Client Synchronization Accuracy: Network factors can limit LAN synchronization accuracy
to 1/2 to 2 milliseconds, typical.
*See GPS-UTC Timing Specifications for details.