F
AULT
A
NALYSIS
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ROUBLESHOOTING
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8024GPS - GPS Sync Module - V02.00
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 within the range of visibility (
In View=07
) but only a
maximum of 2 are displayed in the GPS tab. However, the values of these
satellites are 50 or higher.
Possible fault:
* The visibility range of the antenna to the sky is restricted.
Case 3:
Effect:
9 satellites in the range of visibility (
In View=09
), 6 satellites appear in the
GPS tab. The signal to noise ratios are all less than 30. The module does not
synchronize.
Possible faults:
* The cable is too long
* An incorrect type of cable was used for the length of the antenna equipment
* The BNC sockets are not mounted correctly
* The cable is kinked or broken
* The indirect lightning protector is faulty
* Faulty antenna
Case 4:
Effect:
The module was working well previously but there has been no reception for
several days. There are 7 satellites in the range of visibility (
In View=7
).
However, no satellite is displayed.
Possible faults:
* The cable is damaged.
* There was excess voltage on the antenna equipment and the lightning
protection is damaged.
* The antenna is faulty.
* The GPS receiver on the Sync Module 8024GPS is faulty.
* A constructional change has had an effect on the antenna equipment (e.g.
shading of the antenna due to subsequent building work or the subsequent
laying of cables with high alternating fields in the close vicinity of the antenna
cable)
* Electronic devices with an interference effect on the GPS signal have been
put into operation in the vicinity of the GPS antenna equipment or receiver
(e.g. pager transmitter)
Further information on the subject of the GPS antenna equipment can be found in the
document titled "GPS Antenna Equipment".
