DTV-UDWG100F User Manual
Guilin CEKE Communication Equipment Co., Ltd.
Add: D-08, Information Industrial Park, Chao Yang Rd, High-tech District, Guilin, Guangxi, 541004, P.R.China.
Tel: +86 773 2120 156 Fax: +86 773 2120 299 Email
：
[email protected] Web: www.glsq.com
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Fault Description
According to the general condition of the equipments, the common faults and
troubleshooting methods are shown in below table for your reference:
1. Preamplifier output
signal is too large
2. Equipment self-excited
Preamp input signal is too
small
1. Equipment start status
2. Caused by other faults
Equipment internal
temperature is too high
Output power is too large
Reflection power is too
large
Main power supply failure
PRE-AMP RF out
Preamplifier RF
output
PRE-AMP RF in
Preamplifier RF input
PRE-AMP status
Preamplifier status
TEMP
Temperature
FORD Pow
Output power
REF Pow
Reflection Power
MAIN DC power
Power Supplier
Voltage
Reduce the AGC value; reduce preamplifier input power;
check the adequacy of the antenna isolation, whether
self-excited or not; appropriate adjust protection points.
Reorient the receiving antenna,
adjust input signal to the normal and safe acceptable
range
Wait for equipment start-up; turn the power off and then
restart equipment; check other fault information
Check whether the ambient temperature exceeds the
normal equipment operating temperature; check the fan
is operating well or not; check ventilation; replace the
corresponding device; adjust fan control temperature.
Reduce the output power, check the antenna isolation is
adequate, whether there is self-excited; appropriate
adjust protection points.
Check the output cable connected correctly, check the
antenna VSWR is sufficient; appropriate adjust
protection points.
Check the power supply voltage; adjust setting scope of
protection; replace the corresponding module
Fault Reason
Fault Phenomenon
Treatment
Final power amplifier failure
No RF output, But
AGC value normal
Check final power amplifier power supply and final power
amplifier module, replacing the corresponding module
Off ground
Chassis leakage
Ground connected
