7
GPS161AHS features
The satellite controlled clock GPS161AHS is designed for mounting on a DIN rail.
The front panel integrates two LED indicators, a hidden push button, a DSUB- and a
BNC-connector. The receiver is connected to the antenna/converter unit by a 50
Ω
-
coaxial cable with length up to 300 m. 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 GPS161AHS´s
microprocessor 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 board´s master
oscillator (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 GPS161AHS´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).
Asynchronous serial port
An asynchronous serial interface (RS-232) called COM0 is available to the user. In
the default mode of operation, the serial output is disabled until the receiver has
synchronized after power-up. However, the system can be configured to enable this
output immediately after power-up. Transmission speed, framing and the kind of the
time string can be configured. The serial port is sending a time string either once per
second, once per minute or on request with ASCII ´?´ only. The format of the output
strings is ASCII, see the technical specifications for details. The corresponding
parameters can be set up by GPSMON32 (included Windows software) using serial
port COM0.
Содержание GPS161AHS
Страница 1: ...FUNKUHREN GPS161AHS Technical Information Operating Instructions Incl Windows Software GPSMON32...
Страница 4: ...4 Diskette with Windows Software GPSMON32 24 The program GPSMON32 25 Online Help 26...
Страница 24: ...24 Diskette with Windows Software GPSMON32...
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