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Table of Contents
xi
18.1.1.
ACU display is blank .............................................................................................................................................................. 18-1
18.1.2.
ACU Status displays "REMOTE NOT RESPONDING" ............................................................................................ 18-1
18.2.
T
ROUBLESHOOTING
S
HIPS
G
YRO
C
OMPASS PROBLEMS
....................................................................................................................... 18-2
18.2.1.
STEP-BY-STEP ........................................................................................................................................................................... 18-2
18.2.2.
1:1 SYNCHRO ............................................................................................................................................................................ 18-2
18.2.3.
360:1 Synchro ........................................................................................................................................................................... 18-2
18.3.
T
ROUBLESHOOTING
..................................................................................................................................................................................... 18-3
18.3.1.
Theory Of Stabilization Operation ................................................................................................................................. 18-3
18.3.2.
Series 9711QOR Antenna Initialization ...................................................................................................................... 18-3
18.3.3.
Troubleshooting using DacRemP ................................................................................................................................... 18-4
18.3.4.
Antenna Loop Error Monitoring ...................................................................................................................................... 18-5
18.3.5.
Reference Sensor Monitoring .......................................................................................................................................... 18-6
18.3.6.
Open Loop Rate Sensor Monitoring .............................................................................................................................. 18-8
18.3.7.
Fine Balance and Monitoring Motor Drive Torque ............................................................................................... 18-9
18.3.8.
Open Loop Motor Test ...................................................................................................................................................... 18-10
18.3.9.
To Disable/Enable DishScan® ...................................................................................................................................... 18-11
18.3.10.
Satellite Reference Mode ................................................................................................................................................ 18-11
18.3.11.
To Read/Decode an ACU Error Code 0008 (Pedestal Function Error): ................................................... 18-11
18.3.12.
Remote GPS LAT/LON Position: .................................................................................................................................... 18-14
19.
MAINTENANCE ......................................................................................................................................................................................... 19-1
19.1.
W
ARRANTY
I
NFORMATION
........................................................................................................................................................................ 19-1
19.2.
T
ORQUE AND
L
OCTITE
S
PECIFICATIONS
................................................................................................................................................. 19-2
19.3.
R
ECOMMENDED
P
REVENTIVE
M
AINTENANCE
........................................................................................................................................ 19-2
19.3.1.
Check ACU Parameters........................................................................................................................................................ 19-2
19.3.2.
Latitude/Longitude Auto-Update check ...................................................................................................................... 19-2
19.3.3.
Heading Following.................................................................................................................................................................. 19-2
19.3.4.
Azimuth & Elevation Drive ................................................................................................................................................. 19-2
19.3.5.
Test Tracking ............................................................................................................................................................................. 19-2
19.3.6.
Visual Inspection - Radome & Pedestal .................................................................................................................... 19-2
19.3.7.
Mechanical Checks ................................................................................................................................................................ 19-3
19.3.8.
Check Balance .......................................................................................................................................................................... 19-3
19.3.9.
Observe Antenna Initialization ........................................................................................................................................ 19-3
19.4.
G
ENERAL
M
AINTENANCE
........................................................................................................................................................................... 19-3
19.4.1.
Balancing the Antenna ......................................................................................................................................................... 19-3
19.4.2.
Fine Balance and Monitoring Motor Drive Torque ............................................................................................... 19-4
19.4.3.
To Reset/Reinitialize the Antenna: ................................................................................................................................. 19-5
19.5.
400MH
Z
M
ODEM
C
ONFIGURATION
...................................................................................................................................................... 19-6
19.6.
400
MH
Z
LED
INDICATORS
..................................................................................................................................................................... 19-7
19.7.
400
MH
Z
M
ODEM
S
IGNALS
.................................................................................................................................................................... 19-7
19.7.1.
Pedestal M&C ........................................................................................................................................................................... 19-7
19.7.2.
Radio M&C .................................................................................................................................................................................. 19-8
19.7.3.
Channel Identification ......................................................................................................................................................... 19-8
19.8.
T
ROUBLESHOOTING
400MH
Z
M
ODEM
C
OMMUNICATION
F
AULTS
................................................................................................ 19-9
19.8.1.
400MHz Modem Queries: .................................................................................................................................................. 19-9
19.8.2.
Modem Query Methods ................................................................................................................................................... 19-10
19.8.3.
Isolating a 400 MHz Modem Fault Procedure: .................................................................................................... 19-11
19.8.4.
Installing the Linear/Circular Selectable Feed Assembly ............................................................................... 19-14
19.9.
F
IELD
R
EPAIR
&
C
ALIBRATION OF THE
C-B
AND
C
IRCULAR
/L
INEAR
S
ELECTABLE
F
EED
.............................................................. 19-17
Содержание 9711QOR-86
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