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2/19/10
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3-5
WARNING: Disconnect primary power prior to servicing.
Section 3 Diagnostics
Maxiva ULX ATSC Series
User Manual
User Manual
3.4
Fault Tables
The following tables provide a listing of Maxiva Transmitter faults along with a brief
description, the fault level or threshold and the action taken by the transmitter.
description, the fault level or threshold and the action taken by the transmitter.
Table 3-1 Maxiva Drive Chain Fault List
TYPE
Description
Fault Level or
Threshold
Threshold
Transmitter
Action
Action
Three
Strike
Strike
Available
in Life
Support
in Life
Support
IPA A Fault: Power
Supply, LDMOS,
VSWR, Power
Overload, Tempera-
ture, Input Power
Supply, LDMOS,
VSWR, Power
Overload, Tempera-
ture, Input Power
The IPA can report
up to 6 faults via
their parallel con-
trol pins
up to 6 faults via
their parallel con-
trol pins
Any one fault active
IPA Switch to
alternate IPA if
in Auto Mode
alternate IPA if
in Auto Mode
YES
YES
IPA B Fault: Power
Supply, LDMOS,
VSWR, Power
Overload, Tempera-
ture, Input Power
Supply, LDMOS,
VSWR, Power
Overload, Tempera-
ture, Input Power
The IPA can report
upto 6 faults via
their parallel con-
trol pins
upto 6 faults via
their parallel con-
trol pins
Any one fault active
IPA Switch to
alternate IPA if
in Auto Mode
alternate IPA if
in Auto Mode
YES
YES
PDU (Predriver) A
Fault
Fault
The Predriver cur-
rent is monitored
inside the PDU. A
fault is sent if it is
below the normal
minimum current.
rent is monitored
inside the PDU. A
fault is sent if it is
below the normal
minimum current.
Predriver current is
below TBD mA
below TBD mA
IPA Switch to
alternate IPA if
in Auto Mode
alternate IPA if
in Auto Mode
NO
YES
PDU Predriver B
Fault
Fault
The Predriver cur-
rent is monitored
inside the PDU. A
fault is sent if it is
below the normal
minimum current.
rent is monitored
inside the PDU. A
fault is sent if it is
below the normal
minimum current.
Predriver current is
below TBD mA
below TBD mA
IPA Switch to
alternate IPA if
in Auto Mode
alternate IPA if
in Auto Mode
NO
YES
Exciter A Power
Output
Output
Exciter A power
level low
level low
Trip point is 50% of
nominal. Trip point
adjustable by epot
nominal. Trip point
adjustable by epot
Exciter Switch
to alternate
Exciter if in
Auto Mode
to alternate
Exciter if in
Auto Mode
NO
YES