Raytheon IIS ARTU Air-Ground Radio System User Manual installation manual part seven
Raytheon Company Air-Ground Radio System installation manual part seven
Contents
installation manual part seven
| Download: |  |
| Mirror Download [FCC.gov] | |
| Document ID | 257065 |
| Application ID | 9tHYc/qbknJFZXsfpy1m1A== |
| Document Description | installation manual part seven |
| Short Term Confidential | No |
| Permanent Confidential | No |
| Supercede | No |
| Document Type | User Manual |
| Display Format | Adobe Acrobat PDF - pdf |
| Filesize | 229.89kB (2873585 bits) |
| Date Submitted | 2002-07-17 00:00:00 |
| Date Available | 2002-09-17 00:00:00 |
| Creation Date | 2002-07-01 16:17:20 |
| Producing Software | Hewlett-Packard Intelligent Scanning Technology 3 |
| Document Lastmod | 2002-07-17 14:16:26 |
| Document Title | installation manual part seven |
| Document Author: | tjdrew [ TJDREW ] |
FCC ID: CDG-ARTU
EXHIBIT C
MAGNASTAR C-2000 DIGITAL AIRBORNE TELEPHONE SYSTEM
9.1.10 UNWCKED ONLINE STATE
This test step is a mode change only. Failure of this mode change will only occur if the MMT is not
communicating with the ARTU. This mode change will place the C-2000 back into an operational mode
and allow the installer to perform normal system functions.
Symptom: ERROR=>MMT communications
failure ti~d out.
If this ~ssage is displayedin the RadioResponses
windowthencheckthe cablingbetweenthe
ARTU andthe MMT. If thecablingis correctthenpress"R" to repeatthe test.
.-.cutiDg
in
+ DfS1A205
HHT
Radio
online
unlocked
MMT
8oftwere
Responses-.
state.
TUtorial
V4.0A
Radio
: ~t08:
'Radio aof~e
executing
e) Check.-T cable connection.
in unlocked
online state'
ia not shown
b)
Pres.
...
to
repeat
test.
Figure 9. 10. UnlockedOn-lineStateMMTI TroubleshootScreen.
9-13
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FCC 10: CDG-ARTU
EXHIBIT C
MAGNASTAR
C-2000 DIGITAL AIRBORNE TELEPHONE SYSTEM
9.1.11 RECEIVE SIGNAL STRENGTH MEASUREMENT USING GENSTAR GROUND
STATION
This test step is a verification of operational capabilities of the C-2000 if the installer is able to monitor a
GTE Airfone Ground Station from the location at which the system is being installed. If communications
with a ground station is possible, the Pilot Statusscreenwill indicate that the ARTU is in sync with the
ground station Pilot control channel.
---V4.0A
: C-2000
reports
statua
update
MIr1' Radio Responses-
ENABLED.
PrM8
r2 to Vi-
Status
Display
:IHS1A115
:~t_,
: .)
: b)
:I
ay.tcSoea DOt appear to be monitoring
a grOUDdatation.
Have you waited several minutes for the pilot
scanning to complete and
tha 8Y8tto lock on and monitor a groundstation.
Are you 8Ure that the location
you are currently
at will
support
c.-micatioos
between the AR'n1 and the groundstetion?
Check to see
that this .line
of sight.
RP system is not blocked.
i.e.
the antenna
i. not blocked by carta.
hanger. door. being closed or a building
in
the way.
(a).turn:
Figure 9.
RSS Measurement Using GenStar Ground Station MMTI Troubleshoot Screen.
9-14
RevB
~
FCC ill: CDG-ARTU
EXHIBIT C
MAGNASTAR
C-2000 DIGITAL AIRBORNE TELEPHONE SYSTEM
9.1.12 MMTI Troubleshoot Conclusion
The MMT installation tutorial is concluded with a troubleshoot screenthat provides the telephone number
of the MagnaStar "ST ARLINE". This number can be used to contact MagnaStar personnel concerning
questions about the MMT or C-2000 troubleshooting problems. The STARLINE number is 888-246STAR (7827).
+.
o;
: DfSlA1l6
Pleas.
to the
r 0,
c-;:.F~":CC-.
v. OAIar1' Radio R.""""."-'
-r-
c:,*
direct
questiOl18
or
llagnastar
&1gineering
888-246-STAR (7827).
c~ta
d~t
concerning
on the
*I'I
operatiSTARLDIB at
9. 12. MMTI Conclusion Troubleshoot Screen.
9-15
RevB
~
FCC ill: CDG-ARTU
MAGNASTAR
EXHIBIT C
C-2000 DIGITAL AIRBORNE TELEPHONE SYSTEM
9.2 Additional MMTI Troubleshoot Information
This section provides additional tests that may be used for troubleshooting or system check-out. Tests in
this section require the use of the MMTI commandedmode screens. See section 9.3 for information
detailing navigation and description of the various MMTI commanded mode screens.
9.2.1 Data Cable Pull Check
The data cable pull check can be a useful test for finding intermittent cable connectionsbetween CDBRs or
between a CDBR and an ARTU. This test is performed using the MMTI commanded~e.
This test
involves monitoring debug messageson one of the MMTI statusscreenswhile moving the data cables.
The performance of this test requires the ARTU to be placed in a "locked offline state" in order to easily
rcvicw thc MMTI debug messages.While in the "locked offline state" the "71 PAB_BIT TASK" dcbug
screenwill display a messageif the ARTU detectsan intermittent connection. The MMTI will display
"AMX_IN_SYNC messagereceived from AMX DSP LAN Adr=xx" on the debug screen if an intermittent
connection is detected as shown in Figure 9.2.1. The message"DQ2 DSP_ERROR_CODE rcvd from DSP
#14, HDRI=I00 hex" messagewill appearevery 15 secondson the debug screen when the ARTU is placed
in the proper mode and the correct debug screenselected. If an intermittent connection is detected, check
the cable for proper seating, damage,and bad or broken solder joints. Swapping of a CDBR or AIU may
be necessaryto isolate intermittent or damagedconnectors on the units themselves. The steps for
perfonning the data cable pull check are as follows:
Power up the ARTU and let it complete Built-ln- Test.
Connect the MMT cable to the ARTU and the computer.
Start the MMTI software and select commanded mode of operation.
Select the Goto Radio Installation/f est Menu.
Select the Set Radio Locked/Offline command.
Pressthe escapekey.
Goto Radio Maintenance Operations Menus.
Goto Debug Menu.
EnablelDisable All Debug Msgs.
Enable All Debug Msgs.
Select No to Log Debug messages.
Pressthe "F I" key three times to scroll to the 71 PAB_BIT TASK Debug screen.
The message"DQ2 DSP_ERROR_CODE rcvd from DSP#14, HDRI=IOOhex" messagewill
appear every 15 secondson the debug screen.
Move cables and look for intermittent connections on the MMTI Debug screen.
71 PM_an
:1501.028
:1501.0.3
:1501.058
:15015013
:1501501'
11102 ~_~COI8
f~1 DQ2 08
COI8 ~
f~_~.
1 1102 ~_--COI8
f~1 1102 DSP_--COI8
f~1 nE_~
--~i~
f~
:15015020
1 ~%--8YE
r8C.i~
:15015021
1 ~m_8YE
-_.ag.
r8C.i~
:15015028 1 1102 DSP_--CO~
~~
f~
:150150.3 11102 DSP oR_COD8
fraa
:15015058 1 1102 ~---COD8
f~
:15011010 1 nE--
---
~_i.-4
f~
:15011011 1 ~X8-8YE
r8C.i~
:15011013 1 1102 DSP_8aaOa_CO~ ~
f~
:15:11:28 1 1102 DSP_--COD8
f~
Figure9.2.
TUK
11., ~1
. 100 ~
11., ~1
. 100 ~
DSP 11., ~1
. 100 ~
D8P 11., BD8.1 . 100 ~
AD D8., La8 aAz: . 0
f~AD DSP, La8 aAz: . 2
f~AD ~P, La8 aAz: . 2
D8. 11., BDa1 . 100 hex
08.,1.,
BDa1 . 100 hex
D8. 11., BDa1 . 100 hex
AD D8., LA8 aAz: . 0
f~AD DeP, La8 aAz: . 2
DBP 11., BDal . 100 ~
DB. 11., BDal . 100 ~
71 PAB_BIT TASK Debug screenfor Data Cable Pull Test.
9-16
RevB
FCC 10: CDG-ARTU
MAGNAST
EXHIBIT C
AR
C-2000 DIGITAL
AIRBORNE
TELEPHONE
SYSTEM
To return the C-2000 system to nonnal operation, use the following steps:
After completion, press the "F2" three times.
Press"ESC" several times to return to the C-2000 MMT Main Menu.
Select the Goto Radio lnstallarion!r est Menu.
Select the Set Radio Unlocked/Online command.
9.2.2 Fault Counter Check
The fault counter check can be used to view faults stored in non-volatile memory. The ARTU will store
faults detected during power-up BIT or operational background BIT. See Figure 9.4.2.2. for a display of
the fault counter MMTI screen. The following commandsare to be used to display the ARTU fault
counters:
Power up the ARTU and let it complete Built-ln- Test.
Connect the MMT cable to the ARTU and the computer.
Start the MMTI software and select commandedmode of operation.
Select the Goto Radio InstallatjonfTest Menu.
Select the Set Radjo Locked/Offline command.
Pressthe escapekey.
Select Goto Radio Configuration Menu.
Select Report Fault Counters
9.2.3 Flight Test Log
The flight test log can be a useful tool for identifying problems in a dynamic environment. By saving
software debug information in a log, the information can be reviewed at a later time. By saving the
information on a disk it can be sent to MagnaStar Engineering for review. The following stepsare used to
enable the Flight Test Log:
Power up the ARTU and let it complete Built-In-Test.
Connect the MMT cable to the ARTU and the computer.
Start the MMTI software and select commanded mode of operation.
Select Goto Radio Maintenance Operations Menus.
Select Goto Debug Menu.
Select Enable/Disable All Debug Msgs.
Select Enable All Debug Msgs.
Respond"Yes" to Log Debug messagesto the hard disk.
Enter a filename to identify the debug log file.
Respond"No" to the store TSC Statusupdates.
Respond"No" to the store Pilot Statusupdates.
In order to conservecomputer memory, the debug log should be closed after completion of the flight test.
The following stepswill close the flight test debug log:
Select Enable/Disable All Debug Msgs.
Select Disable All Debug Msgs.
Respond"Ves" to close the debug file on the hard disk.
Q.t7
RevB
FCC ID: CDG-ARTU
EXHIBIT C
MAGNASTAR C-2000 DIGITAL AIRBORNE TELEPHONE SYSTEM
9.2.4 L-Band Interference Tests
Becausethe C-2000 system operatesin the 850.900 MHz range, interference between the C.2000 and LBand equipment (i.e. DME, Transponder, TCAS) can occur if there is not enough isolation between
antennas. Testing for interference can be done by making the C-2000 equipment transmit. By monitoring
the Receiver Signal Strength (RSS) value reported in the Radio Status screenwhile the ARTU is
transmitting, it can be determined if the L-Band equipment interferes with the C-2000 system.
The simplest test method is to use the MMTI installation test mode and to stop at the Receive Signal
Strength test step. By not connecting up the loop around test box, no signal level should be reported above
the nominal no signal value. Frequency agile devices like DMEs must be tuned and transmit acrossthe
whole operating frequency range to assurethat there are no frequency dependentinterference problems. If
any change occurs in the RSS value then there is interference from external equipment. The nominal no
signal value of the RSS can be determined by disconnecting the receive coax cable from the ARTU and
viewing the RSS value on the Radio Status screen. Seesection 6.3.12 for the Receive Signal Strength
Measurementtest procedure.
9.2.5 CEPT -El Communication Verification
The MagnaStar ARTU is capable of interfacing to multichannellNMARSA T SA TCOM equipment using a
CEPT-EI digital interface. ARTU part number 724855-802 has additional hardware which will support
this interface. Calls are routed through the ARTU to the SATCOM over the CEPT-E I interface. The
CEPT-E I interface is a 2.048 MHz time division multiplexed data bus consisting of differential serial
transmit and receive lines.
Communication between the ARTU and the SATCOM equipment can be verified by viewing a MagnaStar
digital handset. If a handsetdisplays the word Satcom on the Services menu when the handsetis on hook.
or in the bezel, then the ARTU and SATCOM equipment are in communication over the CEPT-E I
interface. Also, if the LINK option is available from the handsetMain menu, then the CEPT-EI is
operational. If SATCOM is not present at the Services menu, then the SATCOM system has informed the
MagnaStar system there are no channelsavailable. If this happensduring initial system installation, verify
the Satcom system configuration jumpers (verify that the SATCOM system has been configured for
External CTU). It is possible that conditions may exist which will keep SATCOM calls from being placed
SATCOM units do provided status information to the ARTU over the CEPT-E I bus which can indicate that
the SATCOM unit is either faulted or that SATCOM channelsare not available for use. This information is
reported to the user when a call is placed. SATCOM channelsnot being available for use may include
items beyond the SATCOM unit including satellite coverageproblems or ground station problems.
It is possible to detennine the status of the CEPT-EI interface between the ARTU and the SATCOM unit
using the MMT. Figure 9.2.5 shows the ARTU Statusscreen. In the lower right hand comer is CEPT-EI
statusinformation. The CEPT-EI statusinformation has three possible states;RR, RNR and DOWN.
There are two columns of information. The ARTU column applies to the ARTU and the CMS column
applies to the SATCOM equipment. It may be possible to isolated RNR problems to a particular piece of
equipment using the column labels.
RRRNR
This statusinfom1ation meansReceiver Ready. This condition indicates that the CEPT.
El interface and equipment is operational.
- This statusinformation meansReceive Not Ready. This condition indicates that the
CEPT-E 1 interface is operational but that the equipment is not functional.
DOWN
- This status information meansthat the CEPT-El interface is not operational. This could
indicated that either piece of equipment is at fault or no CEPT-E 1 connection.
Q.IK
RevS
FCC ID: CDG-ARTU
EXHIBIT C
MAGNASTAR C-2000 DIGITAL AIRBORNE TELEPHONE SYSTEM
: Aizeraft
at.atu.
ID:
800001h
: CP1...tUrD to Prior """)
- ...-.. ~
:aa.iv-at.
:..S C488).
:Doppl.Z' CB.).
:Opezo
Stat
-127.5
:Ch
: Ch
:8aD4011
:--
CPO 141..
Cap:
V8C 1/3
"_OFF
.or
DO v...
CODt.%'l.~Ia
.000000
8ot.-.e4
"_On'
ATa!l:
8aD4o11Stat.. .-11
.000000
VIC 1/1
:V8C Stat..
:Cal1..,.
10
aQ8'f:
U'lV
at.atu.
Ad8iA:
U8LOCK
0DeZ"" :
-81.0
-22
. .000000
:acL Yot 10..3.
:.cL 8Z'Z'.
:acL ...
: .000000
-.4io
ID. 88&0001 :
at..tu.
S~)
'002350600
C~l.
..
OFF
Yot lOx6.
8Z'Z' 1 0..3 .
:Ch...
0.0
:T8C/ACC
Stat..
up.sat
AcCOUDt 8a8b8r:
U'lV ftA~
83-
SWitch.
I8
".ID4ioat_.
Oacill-tor
CC-)
an
CIaat.)
!,
Inforn1ation
caU croll
CEPT-EI
8CL.
:.. Ct.%'
1.
: 'fa Ct.%'
1.
Figure 9.2.5. ARTU Status Screen Showing CEPT-EI Interface Infonnation.
9-19
RevB
FCC 10: CDG-ARTU
EXHffilT C
MAGNASTAR
C-2000 DIGITAL AIRBORNE TELEPHONE SYSTEM
9.3 MMTI Commanded Mode
The MMTl commandedmode allows the user more flexibility when testing the C-2000 system versesthe
installation mode. However, more step are required to perform an equivalent task in the commanded mode.
The commandedmode also allows additional test capabilities over the installation mode.
The MMTI commandedmode menu structure is comprised of four sections: the Radio Configuration
menu, the Radio Installation/Test menu, the Boot menu and the Radio Maintenance menu. A flow chart of
the menu structure is shown in Figure 9.3.1
RADIO CONFIGURATION MENU
LOAD SPEED-DIAL DATABASE
SAVE SPEED-DIAL DATABASE
VIEW INVENTORY DATABASE
REPORT FAULT COUNTERS
ENABLE/DISABLE STATUS UPDATES
t: ARTU STATUS UPDATES
PILOT STATUS UPDATES
ENABLE/DISABLE
-I
RT RCL BER
RADIO INSTALLATION I TEST MENU
SET RADIO LOCKED I OFFLINE
COMMANDED
BIT MENU
RF TEST MENU
TRANSMIT
CONTINUOUS
WAVE
TRANSMIT
RANDOM QAM
STOP TRANSMIT
ENABLE TSC RECEIVER
ENABLE PILOT RECEIVER
PERFORM INITIAL PA EQUALIZATION
PERFORM PA EQUALIZATION
UPDATE
FAN CONTROL
(ON I AUTO)
HANDSET
TEST MENU
HANDSET GENERATED CALL PROGRESS TONES
RADIO GENERATED CALL PROGRESS TONES
EST ABUSH HANDSET LAN
RESET HANDSET ATTRIBUTES
RESET MAINTENANCE ACCESS PIN
SET RADIO UNLOCKED I ON LINE
1--1 BOOT MENU
START RADIO SOFTWARE
REPORT RADIO SOF1WARE FILENAMES
INITIATE BOOT
LOAD RADIO SOF1WARE
BATCH LOAD RADIO SOFTWARE
START MMT TUTORIAL
CONFIGURE MMT COM PORT
CONFIGURE BATCH DOWNLOAD BAUD RATE
'--I
RADIO MAINTENANCE OPERATIONS MENU
DEBUG MENU
Figure 9.3.
A Flow Chart Showing The Menu Structure Of The MMT Commanded Mode.
9-20
RevB
FCC ill: CDG-ARTU
EXHIBIT C
MAGNASTAR C-2000 DIGITAL AIRBORNE TELEPHONE SYSTEM
The first screenwhen starting the MMTI software is the MMT Start-up menu. To begin the conDnanded
mode operation, make the appropriate selection from the MMTI Start-up menu as shown in figure 9.3.2. If
the ARTU has been powered prior to starting the MMTI software. the user will then proceed to the MMT
Main menu. Figure 9.3.3 shows the MMT Main menu screen. If power is applied to the ARTU after the
MMT software has started running, the user will then proceed to the MMT Boot Menu when the
CODm1anded
mode of operation is selected. Power must have been feDX)vedfrom the ARTU for greater
than ten secondsin order to proceed to the Boot menu from the Start-up menu.
A breakdown of each oftbe four sections with a description of each sub-~u
sections.
V'.OA
I -
-.4io
Propzoietaryo
,..tar
87
v_.iOG
IU'rALL8a
VDBI~
(C) Copyright
er
1'"
Wt~h
"8P0D8e
8of~
'.0&
aQtlaeOD .,..t-
(C) CGpJ'Z'ight
1"'-1'"
PIaar~
aerial
is provided in the following
C-.
8of~.
Cable
X-. -
81,-'503
::
-- 8t.&&'t.
8t.an -.r
-.r
C-3000
-.r ~
-- C-.a4
_.
I_t.a11at.~
0ftZ~-
:I
:I
881ect. -.r
.t.aft-~
~ioa
C1 - 3. 0 too ~it.
-.r) I -
Figure 9.3.2. The MMT Start-Up Menu Screen
V'.OA
~-ap
Aa'fC
arr
8ooC
884io -'~
1,.25
12.13
18.03
1,.27
1- ~
2- ~
:J-~8ooC-
.~
.,
884ioXA8C&11aCi-"_c
*iAt:--.
C--
aperati-.
(1 - '.
88dioCODfigazo.ci-
: , - _0
88dio
: 8DCezoKai. I
88M 1 cac.f.CD:
88M 2 cac.12'8:
88M 1 C8Cs20ee:
88M 1 C8Cs'"
C-2000
~ DX8-
884io
8taC...
80378 Kicroproc...or
OK. 8aAK OK.
0048 rile Aa'fCC'08.8D
Vezo 0.0 DeC. 0'/08/00
code rile
~'0A.8D
Vezo 0.0 DeC. 03/27/00
ood8 rile
KarrC'OA.8D
Vezo 0.0 DeC. 05/18/"
ood8 ril.
ML-.cJ1C.8D
Var 0.0 DeC8 0'/2'1'8
i. _ciag.
,,
--
0 to q,.it
t.Joe ~).
Figure 9.3.3 The MMT Main Menu Screen.
9-21
RevB
FCC ID: CDG-ARTU
MAGNAST
EXHIBIT C
AR
C-2000 DIGITAL
AIRBORNE
TELEPHONE
SYSTEM
9.3.1 MMTI Commanded Mode - C-2000 MMT Boot Menu
The MMTI Boot menu is used to perfonn functions while the ARTU software in not executing. This
includes reviewing software versions, loading new software files and starting software execution. The
MMTI Boot menu screenis shown in figure 9.3. I. I A brief description of each of the Boot menu
selections is provided as follows:
I} Start Radio Software - This command will start Built-In-Test (BIT) and radio software execution. The
radio software must be executing before any of the menu options, other that the boot menu
options, are valid.
2} Report Radio Software Filenames - This command will report the software files that are loaded in the
ARTU. The software files will be reported similar to those shown in the Radio Responsewindow
of Figure 9.3.1.1.
3} Initiate Boot - This command will stop radio software execution and place the radio in a Boot mode of
operation. The ARTU must be in a Boot mode of operation for commandson this screento be
valid.
4} Load Radio Software - This command is to be used when new software is to be loaded in the ARTU.
This command can only load a single file at a time and is only valid for ARTC and MDSP code.
5} Batch Load Radio Software - This command is to be used to load all four different software files
required to operatethe ARTU at one time. See Figure 9.3.1.2 for an example of the Batch
Software Download screen
6} Start MMT Tutorial- This command can be used to start the installation mode of the MMTI.
7} Configure MMT COM Port - This command is used to changethe data transfer (baud) rate when
loading software between the MMTI computer and the ARTU. It should be noted that after
completion of a file transfer the baud rate must be set back to 9600 in order for the MMTI
software to communicate with the ARTU.
8} Configure Batch Download Baud Rate - This command is used to changethe data transfer (baud) rate
between the MMTI computer and the ARTU when batch software downloading is to be
performed. The default baud rate value is 9600 (9.6 kbs) for batch software downloading. This
command allows the baud rate to be changeto either 19.8 or 38.4 kbs It should be noted that after
completion of a file transfer the baud rate will automatically be set back to 9600 in order for the
MMTI software to communicate with the ARTU.
V6.0A -.r
aadio
"~e
~~-ap
.~a~.o
10376 .ic~oproce.8Or OK. SRA8OK.
Aa~ coda rile ~60..B8X
V~ 0.0 Da~e 0./06/00 ~.025
DS.
.r~
coda rile
coda Pile
coda rile
: 88410.of~
8D8.c.OA.B8X
..r~.OA.B8X
--.~31C.B8X
0.0
0.0
0.0
Date 03/27/00
Da~e 05/11/"
Date 0./2./'6
12013
16.03
~..27
C-2000
- BOO!'
-..
3 -
~e
rDi~iat.e
: 1 - start.
: 2 - ~
b4io
8oftware
Radio SOft--
Batcb ~~
..a4
ril_.
: . - LO84aadioSOf~
: 5 - Ba~cb LO84 b4io SOf~
: 6 - start.
- fttorial
: 7 - c~igure- ~ .~
: 1 - c~igure
8aDk 2 c.c012'1:
8aDk 1 c.c.20'C:
8aDk 1 c.c.-:
i. DOt -_t1ng.
V~
V~
V~
8aDk 6 c.cotc..:
aate
:8Dterc~(1-5.Qtoquit_).-
..
II
Figure9.3.
The MMTI Boot Menu Screen
Q.22
Rev8
FCC ill: CDG-ARTU
EXHIBIT C
MAGNASTAR C-2000 DIGITAL AIRBORNE TELEPHONE SYSTEM
'--V'.OA.-r
Radio ..~
.I
II
.I
C-2000
-.r .- -- ~~~~: bur- - fil- into
the
queue
. ~.~
8aDD ~
: bt.r
P%L
B8X file
to
a-l0a4
f~
: bter - Di_.tic an filP%L8DD.8D
file
to
(88C
to
q8it):
~.B8X
intotbaQU"'.. -~.~
: bter
C:\~
a-l0a4
f~
C:\~
(88C
to
QUit):
: bter - appliceti- filtatoo
tM QU"'.. U'fCc-.~
: 8ater P%L
B8X file
to a-l0a4
f~
C:\~
(8to QUit):
: ...ter- »8.fil.intotheQU"'.. .u..c-.B8X
: ...ter P%L
B8X file
to a-l0a4
f~
C:\~
(88C to QUit):
~.B8X
~.B8X
_pc.-.B8X
Figure 9.3.1.2. The MMTI Batch Software Download Menu Screen
"8POD
Radio
',,': 0':,'
C-2000
C,
V,.OA
~--~-~"~~~
.,
.-r
9.3.2 MMTI Commanded Mode - C-2000 MMT Radio Configuration Menu
The Radio Configuration menu is used to accessARTU databasesand the Status screens. The MMT Radio
Configuration menu screen is shown in Figure 9.3.2.1. The ARTU must be in a "Locked Offline State"
when using these commands. Seethe Radio/lnstallation menu for the information on state changes. A
brief description of each of the Radio Configuration menu selections is provided as follows:
aADZO
-. ~_7ZC8
- Lo84
8pee4-Dial
Databasa.. apee4-DialDataba-
23. 5-
vi- Z_tO&'Y Databa..
Paut COIIDt.8~.
8DAbl./Di.abl.8t.tU8 ap4at..
, - 8DAbl./Di.abl.n 8CL-
: 8Dt-
a84io C-'ipratiOG
_l8CtiOG (1 - I. --
~ ~t
-).
Figure9.3.2. The MMT Radio Configuration Menu Screen.
I) Load Speed-Dial Database- This command will load speed-dial databaseinformation from a file stored
on the computer into the ARTU memory. The numerical portion of the filename root must match
the numerical version number of the ARTC C-2000 software when loading the speeddial
database. See Save Speed-Dial Database. If the numerical portion of the filename root does not
match the numerical version number of the ARTC software, then a DOS command which
modifies the filename will need to be performed.
2) SaveSpeed-Dial Database- This command will save the speed-dial databaseinformation stored in the
ARTU to a file on the computer. The user must provide a root for the filename in which the
information is to be store in the computer memory. The numerical portion filename root will
automatically be tagged with the version number of the ARTC C-2000 software when using this
command.
3) View Inventory Database- This command will display ARTU databasethe following information: the
ARTU electronic serial number, operational minutes and software subroutine version numbers.
9-23
RevB
FCC 10: CDG-ARTU
EXHIBIT C
MAGNASTAR C-2000 DIGITAL AIRBORNE TELEPHONE SYSTEM
4) Report Fault Counters - This command will display the fault counter information stored in the ARTU
non-volatile memory. The ARTU will increment and store faults information if faults are detected
during power-up or background BIT. The fault counter information will be displayed in the Radio
Responseswindow as shown in Figure 9.3.2.2.
5) Enable/Disable StatusUpdates - This command will enable the status screens. The statusscreensare
usedto monitor radio operation. There are two different status screens;the ARTU statusscreenas
shown in Figure 9.3.2.3 and Pilot statusscreenas shown in Figure 9.3.2.4. After the screensare
enable,they can be viewed by pressing the "FI" key. It is possible to toggle between the ARTU
and Pilot screensby pressing "T". To return to the C-2000 MMT menus,press the "F2" key. The
status screenare updated once a secondcorresponding with the blinking word "update" at the top
status screen.
6) Enable/Disable RT RCL BER - This command will enable the Radio Control Link (RCL) Bit Error Rate
(BER) counting. This command must be initiated prior to each ARTU transmission that BER is to
be viewed. The loop around test set-up must have a stable and accurate frequency reference in
order for this function to work.
C-2000 nUL'r COUftD8:
mcao..oc.saoa:
00000
DPaM' 00000
ova_,
00000
81, 00000
X8IT IP, 00000
ar LOOP..cx, 00000
1 - ~
8p.-4-Diel
,,
00000
00000
00000
00000
00000
00000
_a
sag:
-BOPPLY:
UP lIP'
ar ~ CO8V,
acv IF:
.ox DSP'
00000
00000
00000
00000
00000
00000
I - 8D&ble/Di8&ble
Pr"-t
.'
Dat8b8.-
Databa8e
C~t8r.
Statu.
update.
aT acL ...
8Dter aa4io Ccmfiga&-ati-
8p884-Dial Dat~
: 3 - viI_tory
: & - ~
halt
: 5 - 8D&ble/Di8&ble
nP_,
8YaAK:
'IUD MJ8:
"SP DSP,
PA:
LOOP..cK:
8T
: 2 - -
Radio Reep0a8e
C-20008T aADIOCO8PI_TI~ -
,,
V&.OA -.r
_l~i-
(1 - I. --
to ~t
-).
Figme 9.3.2.2. Fault Counter Infonnation As Display In The Radio ResponsesWindow.
9-24
RevB
FCC ill: CDG-ARTU
EXHIBIT C
MAGNASTAR C-2000 DIGITAL AIRBORNE TELEPHONE SYSTEM
Statu. ap4at
Accouat ~s
'002350'00
: Aircx.1t
(Pl...t-.
%D. 800001b
to .ri-
-)
i_t.
-127.5
:..S
0.0
:Cb ...
lusc
call
: .000000
Stat.:
..f.
'Bearer cap.
:.
," ~r1.
"fa
Adain:~
A.ai1:
Oper'~
8Or
v...
DG
%8a
CODtr1so.L%88
BaDdoff Stat.:
..11
.000000
vsc 1/1
'f-opr
I~L
'rot 10x3.
:~L
8&'r:
I~'"
: .000000
:Baadoff
aQ8T: ~
&cr.-)
u~ Stat-
10
-81.0
-22
OFF
lOx6:
10.3:
('r-'rOftl. Stat-
Roc
:Cb 'rot
:Cb 8&'r
ftA~S
US-
(488):
Dopp1.r (Sa):
:Oper
Stat.:
:TSC/ACC Stat.s
aa4io %D: .-&0001
switch:
%8
Taswac %D4icat_:
O.ci11at_:
.000000
c.u
%41.:
83'
(CWa)
U8C 1/3
'f-opr
call
8CL.
:-.
,'.
~r1.
C.
(%..~)
~1.
U'fU
C88
.:
'.
'"' c
~~~~
Figure9.3.2.3.The ARTU StatusScreen.
Statu.
update
: (,.l...t-.
:hbb8D4
to ~ior
-)
: RaM
: ...i.-t
: us
(418)
: Dopplar (B.)
: Syac
: Free ~C.
Awail
: Dopplar
:~
: ~SI
: .. ,.
:..
:..
,,
30
&'raWS _B
111
oor
oor
oor
oor
0 ~
0 x.
Wt.
Wt.
Wt.
22
25
20
15
(~le
ftatua
SO_)
-12.0-127.5-127.5-127.5
-25
Bl :
0 ~
0 x.
1:
22
10
BB. BBBAB. BA. BBB. . . A. . . A. A. . I.
-22
oor
-10.0
117
oor
II
10 :
IB
IB
':
I'
Statua :
1 .ilot
acY
3.~
':
oor
Statu.
: ~8C
.I~
-127.5-127.5-127.5-127.5-127.5
: .. .atb Lo..
: Call
: Cell
UW
c'
~-~~~
,,
Figure 9.3.2.4. The PILOT Status Screen.
9-25
RevB
FCC ID: CDG-ARTU
EXHIBIT C
MAGNASTAR C-2000 DIGITAL AIRBORNE TELEPHONE SYSTEM
9.3.3 MMTI Commanded Mode - C-2000MMT Radio Installationffest Menu
The Installationffest menu is used to command the radio to perfonn may of the task necessaryto check out
a C-2000 installation. The MMT Radio Installationffest menu screenis shown in Figure 9.3.3.1. The
Radio Installationffest menu has three sub-menusin addition to the radio operational state change
commands. The sub-menusare the Commanded BIT. RF Test and the Handset Test menus. A brief
description of each of the Radio/lnstallation menu selections is provided as follows:
y. .0& -.7
aadio
"8P0D888
..
'+
C-2000 -.7
87 ~~
UDIO I8~n~/"'"
~ - ..~
aa4io
Loc-.4/OffliAe
2 - ~o C_--"-" .z~ -
:J-~oUft.~: . - ~o
: 5 - ..~
~~
aa4io
ft.~
VDl~/ODli-
..-
: 8Dte~
-.dio
ft.~
..18C~iOD
(~ -
5.
.aa
~o exi~
>.
~~.*
Figure9.3.3. The MMT Radio InstallationITest Menu Screen.
1) Set Radio Locked/Offline Thelocked/offlinecommandwill changethe operationalstateof the ARTU.
The locked/offline state will allow the ARTU to perform individual tests associatedwith normal
operational functions. When the C-2000 is placed in the locked /offline mode, the Handset will no
longer respond to keypad inputs and the screenmay go blank.
2) Goto Commanded BIT Menu - The Commanded BIT menu is to be used for commanding the ARTU to
perform BIT tests and to view BIT test results. Seeparagraph9.3.3.1 for a brief description of the
Commanded BIT menu selections.
3) Goto RF Test Menu - The RF test menu is to be used to perform tests related to the Radio Frequency
(RF) portion of the ARTU. Seeparagraph 9.3.3.2 for a brief description of the RF Test menu
selections.
4) Goto Handset Test Menu - The Handset test menu is to be used to perform tests related to Handset
operation or high speeddata bus portion of the ARTU. Seeparagraph9.3.3.3 for a brief
description of the Handset Test menu selections.
5) Set Radio Unlocked/Online - The Unlocked/Online command will changethe operational state of the
ARTU. The C-2000 will operatenormally when the ARTU is in the Unlocked/Online State.
9-26
RevB
FCC ID: CDG-ARTU
EXHIBIT C
MAGNASTAR
C-2000 DIGITAL AIRBORNE TELEPHONE SYSTEM
9.3.3.1 C-2000 MMT Commanded BIT Menu
The MMT Commanded BIT menu screenis shown in Figure 9.3.3,
Commanded BIT selections are as follows:
A brief description oftbe
0) View Results - By pressing zero, it is possible to view the BIT test results after BIT testing has
completed.
I) Full BIT - This command will causethe ARTU to run the Full Built-In-Test that is nonnally run upon
power-up.
2) External TDM Loopback - This command will perform a test to check the transmit driver and the line
receiver of the high speeddata bus interface. The transmit outputs (+ and -) must be physically
looped back on the receive inputs in order for this test to pass.
V&.OA ~
R84io ..~
tI
-.au
C-2000
.., ~~
1 - ..11
2 - -~
.%~
:!
ax"
.,.
8Bt.- ax" _l_t.i-
roo.-k
(1 - 2. 0 t.o ri-
...~t."
t.o ~t.
_)1
Figme9.3.3.1
The MMT Commanded BIT Menu Screen
9.3.3.2 C-2000 MMT RF Test Menu
The MMT RF Test menu screenis shown in Figure 9.3.3.2.
selectionsare as fo\lows:
A brief description of the Commanded BIT
1) Transmit Continuous Wave - This command will make the ARTU transmit a continuous wave signal.
This command should be used when checking the ARTUs frequency accuracy. The transmitter
output power level of the ARTU will be]O watts (+40 dBm) minimum with zero dB of
programmed attenuation.
The user will be askedto enter the value of attenuation (0-40 dB). Also, the user will be asked
what frequency to transmit on ( subband(1-10) and channel (1-29) or enter "0" for manual entry
with a resolution to 2 kHz).
2) Transmit Random QAM - This command will make the ARTU transmit a modulated 16 QAM signal.
The transmitter output power level of the ARTU will be ] 0 watts (+40 dBm) averagepower with
zero dB of programmed attenuation. This QAM signal may have peak output power as high as 60
watts
The user will be askedto enter the value of attenuation (0-40 dB). Also, the user will be asked
what frequency to transmit on (subband(]-10) and channel (]-29) or enter "0" for manual entry
with a resolution to 2 kHz).
3) Stop Transmit - This command will causethe ARTU to stop transmitting. It will also disable a receiver
if the receiver has been enabled.
4) Enable TSC Receiver - This command will enable the TSC (voice channel) receiver. The user will be
asked what frequency to tune the receiver (subband(]-]O) and channel (1-29) or enter "0" for
manual entry with a resolution to 2 kHz).
5) Enable Pilot Receiver - This command will enable the Pilot (pilot scanning) receiver. The user will be
askedwhat frequency to tune the receiver (subband(]-]O) and channel (1-6) or enter "0" for
manual entry with a resolution to 2 kHz).
9-27
RevS
FCC 10: CDG-ARTU
EXHIBIT C
MAGNASTAR
C-2000 DIGITAL AIRBORNE
TELEPHONE
SYSTEM
6) Perfonn Initial PA Equalization - This command perfo~ an equalization of the transmitter path. This
command is required prior to every transmit and is automatically perfonned when the transmit
CW or QAM commands are used.
7) Perfonn PA Equalization Update - This command performs an equalization of the transmitter path while
the ARTU is transmitting. This command is equivalent to a digital ALC loop for the transmitter.
This command is automatically perfonned when the transmit CW or QAM commandsare used.
8) FAN Control (On/Auto) - This command can be used to turn the fan located on the ARTU Mounting
Tray Fan to the "ON" condition. It can also be used to place the control of the fan in an automatic
mode of operation in which the ARTU determines when the fan should operate. The ARTU bas
an internal temperature sensorwhich it usesto determine when to operate the fan. The fan should
normally operate when the temperature outside the ARTU is slightly below room temperature.
The ARTU will also operate anytime the ARTU is in a Boot mode of operation.
V6.0A.-r
aa4io
"8PQD8e8
II
1 - 'rr..-it
2 - 'rr..-it
3 - St OP ~~
--~
8 - r-
~t
C-2000
.-r D 6 - _le
5 - 8II8hle
,"rfoza
7 - hrfoza
8aDu
CODtia_.
-~
QAX{
tJ
'.
'r8C _iv.r
.i1ot
..oeiv.r
Initial
.A 8qaali.eti~
.A 8q1I8li..tiOD
update
C~trol
(~/A1Ito)
: 8Dter
1c
~.t
..lectiOD
(1 -
8.
..0
to
eait
).
Figure9.3.3.2.' The MMT RF Test Menu.
9-28
RevB
FCC ID: CDG-ARTU
EXHIBIT C
MAGNASTAR
C-2000 DIGITAL AIRBORNE TELEPHONE SYSTEM
9.3.3.3 C-2000 MMT Handset Test Menu
The MMT HandsetTest menu screenis shown in Figure 9.3.33.
Menu selections are as follows:
vt. OA .-r
,I
aadio
A brief description of the Handset Test
..~
f,
:,
C-2000
-.rBA88ft
- r
--
~U
~O8Pt
:,
: 1 BaD48.t -.tea
Call P.-ogre.. 7-..
: 2 884io
Qe-~.te4
CallP.-ogre..
-.
: 3 - ..tabli.h
8aD4..t
LA8
: t : 5 -
t Baa48.t
t ..iat--.
:: 8Dt.~ 7e.t
Att~ibat..
AGO...
..l.ctioa
pm
::
(1 - 5. 8ac to exit 88Du)I -
.:
Figure9.3.3.3. The MMT Handset Test Menu Screen.
1) Handset GeneratedCall ProgressTones - This command will causea Handset to generateone of several
call progresstone available as a feature of the Handset. Thesetones included: No Tone, Fast
Busy, Bong, Out-Of-Range, and Audible Call Alert. It should be noted that the Handset number
refers to Handset LAN addressand not to the interphone number.
2 - RadioGenerated
Call ProgressTones - This command will causethe ARTU to generateone of several
call progresstone available. Thesetones included: No Tone, Dial Tone, Busy Tone, Ringback
Tone, and Call Waiting Tone. It should be noted that the Handset number refers to Handset LAN
addressand not to the interphone number.
3 - Establish Handset LAN - This command is usedto determine that the high speeddata distribution bus
(or LAN) is in sync with devices connectedto the ARTU. It will also report the number of
Handsetsand repeaterdevices connectedto the LAN. It should be noted that this test treats all
repeaterdevices the same,i.e. CDBRs and AIUs. Also, a CAS will not be reported with this test.
This test takes fifteen secondto complete and display infonnation in the Radio Responses
window. Figure 4.3.3.2 shows the MMT Radio Responsewindow after performing the Handset
LAN test.
4 - Reset Handset Attributes - This command will reset programmable attributes of the Handsetto factory
default values. It should be noted that this command will changevalues of SpeakerGain, Call
Alerter Gain, SidetoneGain, and DTMF Gain.
5 - ResetMaintenance Access Passcode- The Maintenance Access Passcodeis required to establish a
Maintenance Sessionwhich will allow accessto the Handset programmable features of the C-2000
system. Resetting the Maintenance Access Passcodewill set the Passcodeto the factory default
value of 0000.
- 78.t.
: C-2000
8rrABLI8B
78
--
&84io "8PQD8'
LU "_lt8'
PUS
%a ~
3 8a11488t.
A88ig-a
2 cmaa
pze_t
report.8
_i-iDV
t...t.
~8B
_87
ped0C8e4.
Figure 9.3.3.3.2. The MMT Radio ResponsesWindow For The Handset LAN Tell
9-29
RevB
FCC ill: CDG-ARTU
EXHIBIT C
MAGNASTAR
C-2000 DIGITAL
AIRBORNE
TELEPHONE
SYSTEM
9.3.3.4 C-2000 MMT Radio Maintenance Operations Menu
The MMT Maintenance Operations Menu screenis shown in Figure 9.3.3.4. A brief description oftbe
Radio Maintenance Operations Menu selections are as follows:
V..OA.-r
Radio Re8p0D8
C-2000
-.r ~ -
~~~_.~
: 1 - _0 Deboag
_..
: bur
c~
(1, Q to quit -,
,-,
to --
to~.
_)1-
Figure 9.3.3.4. The MMT Radio Maintenance Operations Menu.
1) GoTo Debug Menu - The selection will allow the user to enable or disable the debug messaging
capabilities of the MMT. In general, the debug messagesreport the completion of software tasks while the
ARTU is operating.
9.3.3.4.1 C-2000 MMT Debug Menu.
The MMT Debug Menu screenis shown in figure 9.3.3.4.1. A brief description of the MMT Debug Menu
selections are as follows:
V&.OA ~
88410 "-.0-'
~..au
C-2000-
1 - 8D&bl./Ui8&bl.
2 - Cl.: 3 - a-i:
: 8D~
All
Debug
..g.
'r88k Dabag WiDa-.
La.~ 100 Debug
Dabag ..l8C~iOD (1 - 3. ..0 ~o exi~
). -
;!
Figure9.3.3.4. The MMT DebugMenuScreens.
1) Enable/Disable All Debug Msgs This commandwill enableor disablethe Debugmessage
screens.
When enabling the Debug messagescreensthe user will be askedif Debug log files are to be
created as shown in Figure 9.3.3.4.2. It is also possible to store the ARTU and Pilot Status screens
in a log format and to play back these screens. These log files will store the information in files on
the computer hard drive. To close the log files the Debug messagesmust be disabled. It should be
noted that enabling the log files will use up spaceon the hard drive with the ARTU Statusand
Pilot screengenerating most of the stored information
2) Clear Task Debug Windows This command will clear all task Debug messagescreens.
3) Review Last 100 Debug Messages- This command will allow the user to scroll the last 100 Debug
messagesthat were stored in a log file.
9-30
RevB
FCC ID: CDG-ARTU
EXHIBIT C
MAGNAST AR C-2000 DIGITAL AIRBORNE TELEPHONE SYSTEM
vt.
: Global
--
d8bQV
It
0&
-.4io
..~
-r---
DI8UL8D.
'.i
::::::::::::::::::::::::::::::::;;;-;;~-~;::::::::::::::::::::::::::::::::
: 0 - Di8abl.
All
D8!IQg "88
1 - ~l.
All
D8!1Qg"'.
(0
- 1,
..C
Log
d8bIag
to
bar4
41u?
Di8abl./~l.
All
D8bag
to
..g.
exit
88DD)'
t:
Do ~
ri8la
to
(T or
8).
: 8Dter fil8D888 of aebug log fil..
: Do ~
ri8la to ft-.
8tat.8
: Do
you
ri8la
to
Store
pilot
8tat.8
788tflight.log
(. ftC) Qp48t..?
(.PIL)
Qp48t88?
(T or 8).
(T or
8).
Figure9.3.3.4.2.DebugMessageLog File EnableScreen.
9-31
RevB
FCC ill: CDG-ARTU
EXHIBff C
MAGNASTAR C-2000 DIGITAL AIRBORNE TELEPHONE SYSTEM
9.4 Handset Text Messages
The MagnaStar system provides infonnation screensthat display text messageson the digital handsetLCD
display if the radio detects certain types of operational problems. These text messagesare intended to help
the user determine why a call may not be placed or why a call may have been interrupted and what possible
action to take to correct the problem
There are several handsettext messagethat may be displayed indicating that the ARTU has
detected an abnonnal condition and has taken some type of corrective action. Typically the
corrective action taken is that the ARTU will reload software. These types of handsettext
messagesnormally indicate that the ARTU is not broken and does not need to be replaced. If the
problem reoccurs and cannot be cleared, then reboot the ARTU. This can be accomplished by
pulling the circuit breaker an removing power for greater than IS seconds. This infonnation
applies to the following three handsettext messagescreens:
Channel
Recovery
Limited
To One
Call
Mode
switchover
Failure
Re-Dial
Hang Up
All
Calls
And Redial
To Acquire
Another
C~~J,--
h-Dial
Service
Failure
Two handsettext messagesare shown below that may be displayed if a telephone connection is
abnonnally tenninated. These messagesdo not nonnally indicated an aircraft system fault unless
repeatedoccurrenceof this type of condition exists.
There are several reasonshand-off failures or abnormal call tenninations can occur. They may be
causedby poor radio link conditions, antennablockage, radio frequency interference, base station
coverageproblems becauseoperation is below 18,000 feet, or ground network proble~. If an
aircraft is experiencing excessivecall hand-off failures, then it is suggestedto first check the RF
cabling and antennainstallation on the aircraft. Check for damagedcoaxial cables shields or loose
coaxial cable connectors, especially the SMA connectors on the duplexer.
Call
Handoff
Failure
Re-Dial
Radio
Signal
Lost
Re-Dial
9-32
RevB
FCC ill: CDG-ARTU
MAGNAST AR
EXHIBIT C
C-2000 DIGITAL AIRBORNE TELEPHONE SYSTEM
The radio fault handsettext messageshown below will display a three digit code if the ARTU
detects a built in test fault. The red fault indicator on the front of the unit will also be illuminated
if this messageappears. The fault codes may be an even or an odd number. Even numbered fault
codesindicate that the ARTU has experienceda recoverable fault. The fault may clear itself
within a few minutes. If the problem does not clear itself, then reboot the ARTU. This can be
accomplished by pulling the circuit breaker an removing power for greater than 15 seconds. If the
problem reoccurs, then the ARTU should be replaced. Odd numbered faults indicate a nonrecoverablefault and usually indicate an intermittent or broken ARTU. Intermittent problems may
be cleared by cycling power for greater than 15 seconds. If an ARTU is replaced, please include
the reported fault code and any other relevant information with the unit to explain the reasonfor
unit replacement.
Radio
Fault
xxx
The waiting on system warm-up handsettext messageshown below will be displayed when the
system is first powered up and hasjust completed built in test. The system warm-up is to allow
the ARTU reference oscillator to warm-up and meet the frequency accuracy required for the
system. This warm-up time lasts for four minutes after the system completes power-up built in
test.
The radio overternp fault handsettext messageshown below will be displayed if the radio detects
an abnormal over temperature problem The ARTU has over temperatureprotection and will shut
down if this occurs. The ARTU will automatically recover once the unit has cooled down. This
messagewill only be displayed for a short time prior to the ARTU shutting down.
Waiting
System
Warm-up
on
Radio
OVertemp
Fault
Check
9-33
Fan
RevB
FCC ill: CDG-ARTU
EXHIBIT C
MAGNASTAR C-2000 DIGITAL AIRBORNE TELEPHONE SYSTEM
The status code handsettext messageshown below will be displayed for abnormal call releases
due to software coding problems or unanticipated race conditions. This screen would not indicate
a hardware problem
Status
Code
xxx
Redial
The check CDBR cabling handsettext messageas shown below will be displayed when the ARTU
detects a synchronization problem on the LAN bus between the ARTU and the LAN repeaters.
Typically this fault condition occurs becauseof cabling problems. The most common causeof
this problem are wrong wiring or pinched wiring in the backshell. The ARTU and LAN repeaters
can also be damagedif a LAN repeater is inadvertently connectedup backwards, resulting in the
sametype of fault. LAN repeaterscan be damagedif no cable strain relief is provided in the
installation and may causeintermittent operation or latent faults. Seeparagraph 9.1.8 and 9.2.1 for
MMT troubleshooting test for intermittent fault testing.
9-34
RevB
FCC ill: CDG-ARTU
MAGNASTAR
EXHIBIT C
C-2000 DIGITAL AIRBORNE TELEPHONE SYSTEM
The temporary service disruption handsettext messageis generatedby the handset itself and does
not originate from the ARTU as do all other handsetmessages. This messageis generatedby the
handsetif power and ground are present but the handsetis missing the clock, sync or data. The
messagemay also appearif the data to the handsetis corrupted. If this messageappears,check to
verify that the ARTU has not detected a fault condition or is running power-up BIT. This can be
done by viewing the fault (red) light on the front of the ARTU. If the ARTU fault light is
illuminated then a fault has been detected or is running power-up BIT. Power-up BIT should not
take longer than five minutes to complete. If after enough time has passedto allow power-up BIT
to complete, then the handsettext messagewould be displayed becauseof a fault with the ARTU.
If the temporary service disruption handsettext messageis presentand the ARTU fault light is not
present, then check the handsetand CDBR cabling in the aircraft..
TEMPORARY
SERVICE
DISRUPTION
9-35
RevS
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