Motorola ASTRO 25 GTR 8000 Manual page 213

Problem
Device does not pow-
er up
Device is in a continu-
ous reset state
Exciter Failure
Analog (4-wire) Por-
tion of V.24 Hybrid
Link Failure
V.24 Portion of Hybrid
Link Fails
1 If you have access to the equipment, check the LEDs to determine
which equipment is connected and operational. See
Radio LEDs on page
2 In CSS, check the alarms for the base radio.
3 Check the power cabling and verify that the power source for the base
radio is supplying the appropriate voltage. Try connecting the base ra-
dio to another power source or replace the power cabling if necessa-
ry.
NOTICE: Check all power sources as there may be more
than one.
4 Check for any physical damage to the modules and check whether
the modules were properly grounded.
5 Replace any defective modules.
Assure reference inputs are connected to the appropriate input.
Verify that an antenna relay Enabled either in the UNC or CSS may have
been disconnected. This disconnect causes the base radio to generate
an exciter failure because the antenna relay is controlled and monitored
through the exciter module. However, the exciter failure should be ignor-
ed until after the antenna relay failure is corrected.
In a mixed mode configuration, with hybrid links, and when analog link
monitor tone is enabled (Analog Link Idle Check is enabled in the CSS),
the base radio detects a link failure when the analog link monitor tone
and call activity are absent on the receive line (WL1). Disable Analog Idle
Link Check in the CSS when the comparator type is ASTRO-TAC with
DIGITAC or ASTRO-TAC with MLC 8000. When these failure conditions
are met, the base radio:
1 Logs an occurrence of the failure in the local event log. This log is re-
trievable through the configuration interface.
2 If connected to centralized fault management equipment (optional),
transmits an alarm indication to the fault manager to alert the system
administrator of the failure.
3 A local visual indication is active due to this failure.
Recovery of the link failure results in a similar set of actions to indicate
that the failure event cleared.
NOTICE: A failure of the transport line or a failure of the oppos-
ing host on the wireline link both appear to the base radio as a
link failure. The base radio cannot distinguish between these
two cases.
In a mixed-mode configuration, with hybrid links, the base radio detects a
V.24 link failure when packet activity is absent for a time on the outbound
transmit line. When these failure conditions are met, the base radio:
1 Logs an occurrence of the failure in the local event log. This log is re-
trievable through the configuration interface.
Chapter 8: GTR 8000 Base Radio Troubleshooting
Troubleshooting
264.
MN003286A01-E
GTR 8000 Base
213