hopf Elektronik GmbH 6844, Техническое руководство

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S
YSTEM
I
NDICATORS
/ F
AULT
A
NALYSIS
/ T
ROUBLESHOOTING
System 6844(RC) - V03.00 143 / 157
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: info@hopf.com
The following describes various effects and their possible causes on a non-
synchronizing system:
Case 1 (GPS):
Effect: After the first installation, no satellite appears on the display after several
hours and 00 is displayed under V .
Possible errors:

The antenna cable is too long

An incorrect cable type was used for the length of the antenna equipment

The antenna cable is faulty

The antenna cable is not connected

The antenna is faulty

The lightning protector is faulty

The antenna cable is connected to the wrong BNC
socket (e.g. “DCF-SIM“
socket instead of “Antenna“)
Case 2 (GPS):
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 70 or above.
Possible error:

The visibility range of the antenna to the sky is limited
Case 3 (GPS):
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 light-
ning protector is faulty

Antenna faulty

The GPS receiver of Control Board 6844(RC) is faulty

A building change has had an effect on the antenna equipment (e.g. shad-
ing 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)
Case 4 (Sub-Master):
Effect: The display does not become synchronous (Status "R")
Possible errors:

SYSTEM-Byte set to wrong Sync.-Source

Defective wiring of the Sync.-Signal from the Master System

Disturbed Sync.-Signal
Further information on the subject of the GPS antenna equipment can be consulted in the
manual “Antenna Equipment GPS".