Key Features
- PCI Express Interface
- Plug and play
- Pulses per second and per
minute
- RS232 interface
- Receiver status LEDs
- Buffered hardware clock
- Configurable time zone
- Driver software for all popular
operating systems
Description
The board PEX511 has been designed for the reception
of the DCF77 signal, the transfer of the time
information to a computer with PCI Express interface
and the translation of the received codes into a
serial telegram.
The module is designed as a x1-board (single lane)
in "low profile" format. It is equipped with a
standard height bracket with integrated D-Sub
connector making the serial interface, the pulses per
second and the pulse per minute available. For
installation in a "low profile" computer, an adequate
bracket can be mounted that is included in delivery.
The signals of the D-Sub connector are not available
in this case.
The drivers package for Windows contains a
time adjustment service which runs in the background
and adjusts the Windows system time continously and
smoothly. A monitor program is also included which
lets the user check the status of the device and the
time adjustment service, and can be used to modify
configurable parameters.
The driver package for Linux contains a
kernel driver which allows the board to be used as a
reference time source for the NTP daemon which is
shipped with most Linux distributions. This also
turns the computer into a NTP time server which can
also provide accurate time to other NTP clients on
the network. Some command line tools can be used to
setup configurable parameters and monitor the status
of the board.
Additional drivers packages are available for
DOS, Novell NetWare, and OS/2.
At the bottom of this page there's a link to the
download area.
The device's serial port can be used to update the
card's firmware. Additionally it can be connected to
the serial port of a computer to use the card as
reference time source under operating systems where a
serial time string is supported, e.g. by NTP, but no
kernel device driver is available.
Characteristics
| Type of
receiver: |
Narrowband DCF77 quadrature
receiver with automatic gain control, bandwidth:
approx. 20Hz |
| Status
info: |
RF Signal: Indicated by
LED, antenna alignment enhanced by utility
program
Free running: Indicated by LED and utility
program, without RF signal the clock runs on
quartz basis
Modulation: Indicated by LED and utility
program |
| Reception
Control: |
Multiple check of received
time telegram
Plausibility control by using two complete time
telegrams |
| Pulse
outputs: |
Pulses per second
(RS232/TTL level) and per minute (TTL level),
pulse duration: 100 msec, active high
(only available with "standard height" bracket or
with additional "low profile" bracket). |
|
Interface: |
One serial RS232
interface
(only available with "standard height" bracket or
with additional "low profile" bracket). |
| Data format PC
interface: |
Binary, byte
serial |
| Data format of
interfaces: |
Baudrate: 300, 600, 1200,
2400, 4800, 9600 baud
Framing: 7E2, 8N1, 8E1, 8N2
Output string: 32 ASCII characters with date,
time and status information |
|
Statusbyte: |
Informations about free
running mode, daylight savings time and DST
pre-switch anouncement, synchronization since
last reset, GMT/UTC time and validity of the
hardware clock data |
| Electrical
connectors: |
BNC female connector
9 pin sub D male connector (only available with
"standard height" bracket or with additional "low
profile" bracket) |
| Computer
interface: |
Single lane (x1) PCI
Express (PCIe) Interface
PCI Express r1.0a compatible |
| Backup battery
type: |
In case of supply voltage
failure the on-board RTC keeps the time based on
XTAL for more than 150 hours (buffer
capacitor)
Optional: lithium backup battery (life time: 10
years) |
| Board
type: |
Low profile board (68,90 x
150 mm) |
| Ambient
temperature: |
0 ... 50°C / 32 ...
122°F |
|
Humidity: |
Max. 85% |
| Scope of
supply: |
Scope of supply
includes:
- an active ferrite antenna AI01 and 5m of RG174 coaxial cable
with BNC connectors.
Optional: AW02 with RG58
and patch cord, other length of cable
- "low profile" bracket |
| RoHS-Status of the
product: |
This product is fully RoHS
compliant |
| WEEE status of the
product: |
This product is handled as
a B2B category product. In order to secure a WEEE
compliant waste disposal it has to be returned to
the manufacturer. Any transportation expenses for
returning this product (at its end of life) have
to be incurred by the end user, whereas Meinberg
will bear the costs for the waste disposal
itself. |
|
