PC32: DCF77 Computer Clock (ISA bus)


DCF77 Slot Card PC32

DCF77 slot card PC32 with ISA bus interface, periodic interrupts and RS232 interface.

The Windows driver package includes a time synchronization service which runs in the background and adjusts the Windows system time continuously and invisibly. This package also includes a monitor program to enable the user to check the status of the device and time adjustment service. If the monitor program is run with administrator rights, it can also be used to modify configurable parameters.

The Linux and FreeBSD driver packages include a kernel driver which allows the product to be used as a reference time source for the NTP daemon included in most Unix-like operating systems. This also allows the computer to be used as an NTP time server to provide accurate time to NTP clients on the network. Some command line tools can be used to modify configurable parameters and monitor the status of the clock in use.

Please contact Meinberg's Support Team for more information on using the card with other operating systems: techsupport@meinberg.de.

The device's serial port is not required for operation but can be used to update the card's firmware, or to provide another computer with the current time via a serial time string.

End of Life Announcement

This product is no longer available and may have been replaced by a newer product. We will, of course, continue to provide support for units that have already been purchased and are still in use. Please contact our Sales Department for further details.

This product has been discontinued and has been replaced with: PZF180PEX

Key Features

Warranty Period (Years): 2 RoHS-compliant
  • IBM PC/XT/AT Interface
  • Pulses per second and per minute
  • Periodic interrupts
  • RS-232 interface
  • Reception status indicated by LED
  • Buffered hardware clock
  • Settable Base Address
  • Driver software for all popular operating systems




Product Description



Characteristics

Receiver Type Narrowband synchronous receiver with automatic gain control, Bandwidth: approx. 40Hz
Status Indicators 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 XTAL with an accuracy of ±1·10-6 (after 24 hours of synchronous operation)
Modulation: Indicated by LED and utility program
Type of Antenna DCF77 indoor antenna AI01
Accuracy free run Accuracy of the quartz base after min. 24hrs of synchronized operation: ±1·10-6
Reception Monitoring Incoming time string undergoes multiple checks
Plausibility test using two full consecutive time strings
Interface Single serial RS-232 interface
Data format PC interface Binary, byte serial
Serial Time String Output 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 9 pin sub D male connector
BNC female connector
Computer interface IBM PC/XT/AT-Bus
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)
Operating Voltage +5 V DC
Current Draw ca. 80mA
Board type 8 bit short expansion board
Supported Temperature Operational: 0 - 50 °C (32 - 122 °F)
Storage: -20 - 70 °C (-4 - 158 °F)
Supported Humidity Max. 85 % (non-condensing) at 40 °C
Options Pulse per second and pulse per minute (TTL level)


Downloads

Short Info Sheet



Manuals


Please note that only the most recent manual version is available for download. This manual therefore may not be suitable for all product versions.
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