Hopf Elektronik manufactures GPS satellite clocks as well as radio clocks designed for
the DCF77 time signal broadcast by the National Institute of Natural and Engineering Sciences in Germany. This driver supports the
Hopf Elektronik clock model 6039 PCI board. Both, the DCF and GPS variants are supported. You may visit Hopf Elektronik on the web at
http://www.hopf-time.com , or email technical support at firstname.lastname@example.org.
Hopf6039 PCI-Bus Receiver
When the unit is slotted into an internal PCI bus of a personal computer and connected to its external GPS antenna, the Hopf 6039
diagnostic software will display the synchronization status of the unit on the Date & Time tab in the
Status field. Satellite signal strength is displayed on the Satellites tab. When the Hopf 6039 clock has
successfully synchronized to satellite time or DCF77 time, the status indication changes to "clock is radio
synchronouswith crystal control standard time" as shown below. If you wish PresenTense Server to use the
timestamps obtained from your Hopf clock prior to this stage, see "flag1" under Driver Tunables at the
bottom of this page.
Hopf6039 Benchmark Tests
The Hopf 6039 PCI bus board has performed extremely well in benchmark tests with sub-millisecond accuracy.
Driver tunables :
||one to four
default GPS or DCF
||Use value 1 to
force synchronization when only "crystal driven".