GEN182: DCF77 Code Generator



The time code generator GEN182 has been designed to generate all signals required to control or simulate a DCF77 compatible long wave transmitter, or provide the reference time for an NTP server.

All output signals are based on one 10 MHz reference frequency. This reference frequency is either generated by the on board quartz oscillator (TCXO, optional: OCXO) or applied externally. The beginning of a second can be synchronized with an external signal.

Key Features

Warranty Period (Years): 3 RoHS-compliant



Product Description

Generated Signals:

  • 77.5 kHz carrier frequency
  • Second marks to modulate the carrier's amplitude
  • PZF sequence and PZF window to modulate the carrier's phase
  • Pulse-per-Second (PPS) output

Additionally, an IRIG or AFNOR time code signal is generated, and a serial time string can be transmitted which includes the generated absolute date and time.

All signals are derived from a single 10 MHz reference frequency. That frequency can either be generated by a high quality on-board oscillator, or it can be supplied externally. The frequency source is selected by a jumper on the printed circuit board. The leading edge of the second marks can be synchronized by an external PPS input signal.

Internal date and time is always based on UTC. A configurable time offset can be applied to the UTC time base to compute a local standard time. Beginning and end of a period of daylight saving time can either be computed year by year based on a simple, configurable algorithm, or can be configured for the current year. GEN182 generates the proper changeover announcement flags as required by the DCF77 coding scheme.

Additionally, a date for insertion of a leap second can be configured. Actually, leap seconds are only inserted at UTC midnight. GEN182 automatically generates the coding sequences to announce the leap second as required for DCF77 and NTP, and also inserts the leap second correctly.



Characteristics

Display LC Display, 4 x 16 characters
Control Elements Backlit LC Display
Shows time/date and other information of the system.

Function Keys
Also several user parameters can be controlled and changed with 4 keys:

  • Parameter Setting: Changeover of daylight saving is generated automatically. Beginning and ending of daylight saving may either be defined by exact dates for a single year or using an algorithm which allows the generator to recompute the effective dates year by year. The date of insertion of a leap second can be edited, too. GEN182 generates the announcement of the leap second as well as the leap second itself. The length of the time marks 0 to 15 can be controlled by 16 TTL inputs.

  • Interface Single serial RS-232 interface
    Serial Time String Output Baudrate: 300, 600, 1200, 2400, 4800, 9600, 19200 baud
    Framing: 7N2, 7E1, 7E2, 8E1, 8N1, 8N2
    Dimensions of the front panel 21HP/3U (106 mm x 128 mm), with integrated membrane keyboard
    Electrical Connectors 64 pin rear VG edge connector DIN 41612
    Power Consumption 1,5 W
    Operating Voltage + 5V,
    +12 V only when using OCXO)
    Current Draw +5 V, @300 mA
    +12 V, @50 mA (only when using OCXO)
    Board type Eurocard
    Board Dimensions 160 mm x 100 mm, 1,5 mm Epoxy
    Supported Temperature 0 ... 60° C (32 ... 140° F)
    Supported Humidity Max. 85 % (non-condensing) at 40 °C
    Warranty Three-year warranty
    Options Also available as ready installed complete system GEN170TGP.
    RoHS Status of Product This product is fully RoHS-compliant.
    WEEE Status of Product This product is handled as a B2B (Business to Business) category product. To ensure that the product is disposed of in a WEEE-compliant fashion, it can be returned to the manufacturer. Any transportation expenses for returning this product (at end-of-life) must be covered by the end user, while Meinberg will bear the costs for the waste disposal itself.


    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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