Specifications
OWNER’S GUIDE INTERFACE CARDS | 18429
Mounting the Aerial
The aerial supplied with the DEWE-CLOCK is designed to be
mounted with the included mounting kit. The positioning of the
aerial is critical to the correct operation of the DEWE-CLOCK.
The aerial picks up the signals from up to 12 satellites which are
all in different places in the sky. These satellites are not necessar-
ily directly overhead, and can often be close to the horizon. There-
fore it is best to mount the aerial in a way, that the least amount
of metal obscures the view of the sky. On a domed roof, place the
aerial on the top of the dome. On an open car with a roll-over bar,
place the aerial horizontally on the highest point of the roll-over
hoop and tape the wire securely to the frame.
Although the DEWE-CLOCK can work with at least three satellites,
it’s precision increases the more satellites it nds. If one satellite
disappears over the horizon, or behind an object, there are other satellites still in view.
In order to x your antenna on a tube, use the provided universal mounting adaptor. The image here shows
you how to afx the tube with the screws - see call-outs (1) (2).
- Important note: The maximum diameter is limited to 43 mm (1.7 Inch). Otherwise the universal mounting
adapter will not t on the tube.
The DEWE-CLOCK is shipped with a 6 m antenna cable (standard). 15 m or 25 m antenna cables are avail-
able optionally.
PC-GPS-CBL15 - 15 m
PC-GPS-CBL15 - 25 m
This is an industry standard BNC connector, female. A mating BNC cable
is not included with the IRIG-CLOCK option.
Warm-Up time
When the DEWE-CLOCK is used as GPS based time code generator
for the rst time, has been moved more than 200 km or not used for 10
hours (since last usage), it is recommended to perform a ‘cold start’. To
get the best performance from your GPS in the future, perform this cold
start in an open place with a good all round view to the sky. Allow the
GPS to map the satellites for at least 20 to 30 minutes. The GPS builds
up the ‘Ephemeris’ data on each satellite which is stored in a non-volatile