Meinberg GPS164/AQ/AHS, Руководство по эксплуатации

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GPS164xHS features
The GPS164xHS is designed for mounting on a DIN rail. The front panel integrates
five LED indicators, a hidden push button, an eight-pole terminal block, theree
DSUB- and three BNC-connectors. The receiver is connected to the antenna/conver-
ter unit by a 50
Ω
-coaxial cable with length up to 300 m (when using RG58 cable). It
is possible to connect up to four receivers to one antenna by using an optional antenna
diplexer.
The navigation message coming from the satellites is decoded by GPS164xHS´s
microprocessor in order to track the GPS system time with an accuracy of better than
±250 nsec. Compensation of the RF signal´s propagation delay is done by automati-
cal determination of the receiver´s position on the globe. A correction value compu-
ted from the satellites´ navigation messages increases the accuracy of the board´s
TCXO to ±5
. 10
-9
and automatically compensates the oscillators aging. The last recent
value is restored from the battery buffered memory at power-up.
Time zone and daylight saving
GPS system time differs from the universal time scale (UTC) by the number of leap
seconds which have been inserted into the UTC time scale after GPS has been
initiated in 1980. The current number of leap seconds is part of the navigation
message supplied by the satellites, so GPS164xHS´s internal real time is based on
UTC.
Conversion to local time including handling of daylight saving year by year can be
done by the receiver´s microprocessor if the corresponding parameters are set up
with the help of the software GPSMON32 (included Windows software).