Meinberg GPS170PCI, Руководство пользователя

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Page 8 6 Connectors and LEDs in the rear slot cover
6 Connectors and LEDs in the rear slot cover
GPS
antenna
modulated
timecode
LOCK FAIL
BSL key
RxD
TxD
GND
The coaxial antenna connector, two status LEDs and
a 9 pin sub D connector can be found in the rear slot
cover. (see gure). The upper, green LED (LOCK) is
turned on when after power-up the receiver has acquired
at least four satellites and has computed its position.
In normal operation the receiver position is updated
continuously as long
as at least four satellites can be received.
The lower, red LED (FAIL) is turned on after power-up
until the receiver has synchronized or if a severe error
occurs during operation.
The 9 pin sub D connector is wired to the serial port
COM0. Pin assignment can be seen from the gure
beside. This port can not be used as serial port for the
computer. Instead, it can be uses to send out Mein-
berg's standard time string to an external device.
A DIL switch on the board can be used to wire
some TTL inputs or outputs (0..5V) to some con-
nector pins. In this case, absolute care must be
taken if another device is connected to the port,
because voltage levels of -12V t12V (as
commonly used with RS-232 po rts) at TTL inputs
or outputs may damage the radio clock.
Behind the little hole in the slot cover there is a push button (BSL) which is needed if the clock's rmware shall
be updated. See the chapter about rmware updates for details.
8 Date: 12th July 2012 GPS170PCI