TM8100 Mobile Radio
Service Manual
Diagnosis of Faults on Main Board
205
May 2004 © Tait Electronics Limited
Task 6 —
Radio Mute Faulty
If the radio mute is faulty, use the programming and calibration
applications to check the relevant settings.
1.
Check the programming of the mute. In the programming
application click the
“Basic Settings”
page under the
“Networks”
heading. Click the
“Basic Network Settings”
tab.
2.
Check the setting in the
“Squelch Detect Type”
field. Ensure that
the setting is what the Customer expects. If the setting is
“Noise
Level”
, implying that noise muting is selected, go to Step 3. If the
setting is
“Signal Strength”
, implying that RSSI muting is selected,
go to Step 7.
3.
With noise muting selected, check the noise mute settings: In the
calibration application open the
“Variable Parameters”
page and
click the
“Squelch and Signal Strength”
tab.
4.
Ensure that, under the
“Squelch Threshold”
label, the settings in the
“Country”
,
“City”
and
“Hard”
fields are what the Customer expects.
5.
Open the
“Raw Data”
page and click the
“Mute”
tab. Compare the
values in the
“Mute Noise Readings”
field with the required
minimum and maximum values listed in
. If the values
are correct, go to Task 1 and check the receiver sensitivity. If they
are not, go to Step 6.
6.
Recalibrate the mute and then check if the mute fault has been
removed. If it has, return to
. If it has not, go to
Task 1 and check the receiver sensitivity.
7.
With RSSI muting selected, check the RSSI mute settings: In the
calibration application open the
“Variable Parameters”
page and
click the
“Squelch and Signal Strength”
tab.
8.
Check that the values in the
“Busy Opening Pt”
fields and the
“Busy
Hysteresis”
fields are what the Customer expects. If they are, go
to Task 5 and check the RSSI calibration. If they are not, go to
Step 9.
9.
Adjust the values in the
“Busy Opening Pt”
and
“Busy Hysteresis”
fields. Program the radio with the new values. Check if the mute
fault has been removed. If it has, return to
. If it
has not, go to Task 5 and check the RSSI calibration.
Summary of Contents for TM8000 Series
Page 32: ...32 Introduction TM8100 Mobile Radio Service Manual May 2004 Tait Electronics Limited ...
Page 78: ...78 Circuit Descriptions TM8100 Mobile Radio Service Manual May 2004 Tait Electronics Limited ...
Page 106: ...106 General Information TM8100 Mobile Radio Service Manual May 2004 Tait Electronics Limited ...
Page 124: ...124 Servicing Procedure TM8100 Mobile Radio Service Manual May 2004 Tait Electronics Limited ...
