Meinberg GEN170TGP Information Sheet

GEN170TGP: DCF77 Code Generator in desktop case
The GEN170TGP generates a DCF77 compatible signal with programmable date and time information. So it
is possible to check the correct funktion of a radio clock or decoding software at a specific time. GEN170TGP
is a set of equipment composed of a GEN170, a power supply and the additional DCF77 simulator [1]
, all installed in a metal desktop case and ready to operate. A DCF77 radio clock can be connected directly
via the rear panel antenna output connector. The interfaces and signals provided by GEN170 and SIM77 are
accessible via connectors in the rear panel of the case.

Key Features

- AM and PM
- Leap Second Capability
- Daylight Saving Capability
- TCXO Reference Frequency

Description

The time code generator GEN170 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:
* 77.5 kHz carrier frequency
* Second marks to modulate the carrier's amplitude
* PRN sequence and PRN 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.
Internal date and time is always based on UTC (Universal Time, Coordinated; formerly GMT, Greenwich Mean Time). 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. GEN170 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. GEN170 automatically generates the coding
sequences to announce the leap second as required for DCF77 and NTP, and also inserts the leap second correctly.
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Meinberg Radio Clocks
Lange Wand 9
31812 Bad Pyrmont, Germany
Phone: +49 (5281) 9309-0
Fax: +49 (5281) 9309-30
http://www.meinberg.de
info@meinberg.de
SIM77P
gen170tgp