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7 Installing the radio clock
Every PCI board is a plug&play board. After power-up, the computer's BIOS assigns resources like I/O ports and
interrupt lines to the board, the user does not need to take care of the assignments. The programs shipped with
the board retrieve the settings from the BIOS.
7.1 Configuring the 9 pin connector
By default only the signals needed for the serial port COM0 are mapped to the pins of the connector. Whenever
one of the additional signals shall be used, the signal must be mapped to a pin by putting the appropriate lever
of the DIL switch in the ON position. The table below shows the pin assignments for the connector and the DIL
switch lever assigned to each of the signals. Care must be taken when mapping a signal to Pin 1, Pin 4 or Pin 7
of the connector, because one of two dierent signals can be mapped to these Pins. Only one switch may be put
in the ON position in this case:
Pin 1: DIL 1 or DIL 8 ON
Pin 4: DIL 5 or DIL 10 ON
Pin 7: DIL 3 or DIL 7 ON
The gure left shows DIL1 and DIL4 ON =>
PIN1: VCC out
PIN8: PPO0 - PPS out
Those signals which do not have a lever of the DIL switch assigned are always available at the connector:
D-SUB-Pin Signal
Signal level
DIL-switch
1
VCC out
+5V
1
1
PPO0 (PPS) out
RS232
8
2
RxD in
RS232
-
3
TxD out
RS232
-
4
PPO1 (PPM) out
TTL
5
4
10MHz out
TTL
10
5
GND
-
-
6
CAP0 in
TTL
2
7
CAP1 in
TTL
3
7
IRIG DC out
TTL into 50
Ω
7
8
PPO0 (PPS) out
TTL
4
9
PPO2 (DCF) out
TTL
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7.2 Installing the GPS170PCI in your computer
The computer has to be turned o and its case must be opened. The radio clock can be installed in any PCI
Express slot not used yet. The rear plane must be removed before the board can be plugged in carefully. The
computers case should be closed again and the antenna can be connected to the coaxial plug at the clock's rear
GPS170PCI
Date: 12th July 2012
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