F
AULT
A
NALYSIS
/
T
ROUBLESHOOTING
8029HEPTA-V2/GPS GPS - NTP Time Server with LAN Interface - V08.00
110 / 130
hopf
Elektronik GmbH
Nottebohmstr. 41
• D-58511 Lüdenscheid • Tel.: +49 (0)2351 9386-86 • Fax: +49 (0)2351 9386-93 • Internet: http://www.hopf.com • E-Mail: [email protected]
Case 2:
Effect:
There are 7 satellites in the visibility range (
V=07
) but a maximum of 2 appear
on the display frame. However, the value of these satellites is 30 or above.
Possible Errors:
•
The visibility range of the antenna to the sky is limited.
Case 3:
Effect:
There are 9 satellites in the visibility range (
V=09
) and 6 appear on the display
frame. The signal/noise ratios are all below 30. The equipment is not
synchronized.
Possible Errors:
•
The cable is too long
•
An incorrect cable type was used for the length of the antenna equipment
•
The BNC connectors are poorly mounted
•
The cable is bent or crimped
•
Indirect lightning protection was irreversibly damaged by overvoltage
•
The antenna is defective
Case 4:
Effect:
The equipment was working perfectly but has not been receiving for several
days. 7 satellites appear in the visibility range (
V=07
) but no satellite is
displayed.
Possible Errors:
•
The cable has been damaged
•
There was excess voltage on the antenna equipment and the indirect
lightning protector is defective
•
The antenna is defective
•
The GPS receiver of Module 8024GPS is defective
•
A building change has had an effect on the antenna equipment (e.g. shading
of the antenna caused by subsequent building installation, or the laying of
cables with a high electrical alternating field in the immediate vicinity of the
GPS antenna cable)
•
Electronic equipment with an interference effect on the GPS signal has been
put into operation in the vicinity of the GPS antenna equipment / GPS
receiver (e.g. transmitter for pagers)
Further information on the subject of the GPS antenna system can be consulted in the manual
"Antenna Equipment GPS".
