S
YSTEM
I
NDICATORS
/ F
AULT
A
NALYSIS
/ T
ROUBLESHOOTING
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6842 GPS Slim Line System - V09.01
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 4:
Effect:
The equipment was working perfectly but has not been receiving for several
days. 7 satellites appear in the visibility range (
V=07
). However 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 faulty
•
Antenna faulty
•
The GPS receiver of Control Board 6842 is faulty
•
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 equipment can be consulted in the
manual “Antenna Equipment GPS".
7.2.6 No DCF77 Antenna Simulation / DCF77 Pulse
Description
•
A System that is connected to the DCF77 Antenna Simulation or DCF77 pulse does
not synchronize.
Cause / Problem Solution
•
The System is not synchronous and the timer for the DCF77 Antenna Simulation has
expired.
7.2.7 No or Incorrect Serial Output
Description
•
The connected Systems do not receive a serial string
•
The connected Systems receive serial strings with a time that differs from the
System
Cause / Problem Solution
•
The serial interfaces are not configured correctly (e.g. only transmit on enquiry,
active handshake, UTC output, etc.).
•
The connection to the serial interfaces is not correct (e.g. TxD and RxD cables
transposed).
