12
Installation
Power Supply
The power supply used with a GPS167 has to provide only one output of +5V. The
output voltage should be well regulated because drifting supply voltages reduce the short
time accuracy of the generated frequencies and timing pulses. The power supply lines
should have low resistance and must be connected using both pins a and c of the rear
connector.
Mounting the Antenna
The GPS satellites are not geostationary, each of them circles around the earth approx.
every 12 hours. The satelite signals can be received only if no building or any other
object is in the line-of-sight from the antenna to the satellite, therefore the antenna/
converter unit must be installed in a location with an unobstructed view of the sky. Very
good reception is possible when the antenna has a free view of 8° angular elevation
above horizon. If this is not possible the antenna should be installed with a free view to
the equator because of the satellite courses which are located between latitudes of 55°
North and 55° South. If even this is not possible, problems will occur, especially during
position aquisition, when at least four satellites for calculation of the receivers position
have to be available. As soon as the position has been determined, one satellite is enough
to remain in synchronized state.
The antenna/converter unit can be mounted on a pole with a diameter up to 60 mm or
at a wall. Every GPS167 comes with a 50cm plastic tube, two holders for wall-mounting
and clamps for pole-mounting. A standard coaxial cable with 50 ohms impedance should
be used to connect the antenna/converter unit to the receiver. The maximum lenght of
cable between antenna and receiver depends on the attenuation factor of the used coaxial
cable.
Example:
Type of cable
diameter
Ø [mm]
Attenuation at 100MHz
[dB]/100m
max. lenght
[m]
RG58/CU
5mm
15.9
300
1
RG213
10.5mm
6.9
700
1
1)This specifications are made for antenna/converter units produced after January, 2005
The values are typically ones; the exact ones are to find out from the data sheet of the
used cable.
Summary of Contents for GPS167SV
Page 1: ...Incl Windows Software GPSMON32 GPS167SV Technical Information Operating Instructions ...
Page 30: ...30 ...
Page 33: ...33 AFNOR Standard Format ...
Page 40: ...40 ...
Page 43: ...43 Diskette with Windows Software GPSMON32 ...
Page 44: ...GP S 1 6 7 S V E 0 5 0 5 0 6 ...