Meinberg GPS163TDHS - Manual (Page 7)

7
Features of GPS163TDHS
The GPS163TDHS is designed for mounting on a DIN rail. The front panel integrates
five LED indicators, a hidden push button, an eight-pole terminal block, three female D-
SUB-9- and three BNC-connectors. The receiver is connected to the antenna/converter
unit by a 50
Ω
-coaxial cable with length up to 250 m (if 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 GPS163´s micropro-
cessor in order to track the GPS system time with an accuracy of better than ±1 µsec.
Compensation of the RF signal´s propagation delay is done by automatical determination
of the receiver´s position on the globe. A correction value computed from the satellites´
navigation messages increases the accuracy of the onboard TCXO to ±5
. 10 -9 and
automatically compensates the oscillators aging. The last recent value is restored from the
battery-backed 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 GPS163´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).