Harris RF Communications Division RF-7800B-DU024, RF-7800B-VU104 User Manual

RF-7800B

R

NOTE

SCHEDULED MAINTENANCE

CHAPTER 5

SCHEDULED MAINTENANCE

5.1 PREVENTIVE MAINTENANCE

Preventive maintenance is the systematic, daily care and inspection of equipment to prevent equipment failure and
reduce downtime.

Table 5-1 contains the checks and services that should either be performed on a daily basis when the equipment is

in use or on a weekly basis when the equipment is in a standby condition. Tab le 5-2 contains the checks and services
that should be performed on a weekly basis.

Table 5-1. Daily Preventive Maintenance Checks and Services

Check No. Item to be Inspected Procedure

1 Completeness Check to see that the equipment is complete.

2 Exterior Surfaces Remove dust, dirt, and moisture from all surfaces. Only use a soft

damp cloth to clean the Broadband Global Area Network (BGAN)
Terminal.

3 Operation Verify connection to BGAN terminal web interface.

4 Installation Check hardware for looseness. Make sure unit is secure.

5 RF-7800B-VU104 drain

holes

There are four separate drain holes on the bottom of the RF-7800B­VU104 that will allow condensation and moisture out of the
antenna to prevent any corrosion. Turn the screws clockwise to
Open and counterclockwise to Close.

Table 5-2. Weekly Preventive Maintenance Checks and Services

Check No. Item to be Inspected Procedure

1 Connectors Check all connectors for debris, damage, or corrosion. Elevate to

a higher level of maintenance, if required.

2 Antenna Check for breaks or strains; repair or replace as required.

3 Cables Check for cracks or cuts; repair or replace as required.

To avoid impaired BGAN terminal performance, make sure
the antenna is not damaged or the surface is not covered with
foreign material like paint of labeling.

5.2 CORRECTIVE MAINTENANCE

Shortcomings and defects which are revealed when the BGAN terminal is in service must be attended to by means
of corrective maintenance. The type of work required determines if the corrective maintenance procedure can be
performed by the operator, or if it must be performed at a maintenance facility.

5-1

RF-7800B

R

SCHEDULED MAINTENANCE

The following procedures assume that the operator has determined that the BGAN terminal is faulty. This could be
determined in three ways:

 The self-test has been run and a fault code has been identified by the BGAN terminal.

 A run-time fault message is displayed by the Antenna Status page.

 The observed degraded operation suggests that the BGAN terminal is faulty.

Whenever it is believed that the BGAN terminal may be faulty, the troubleshooting procedures in this chapter should
be followed to determine the recommended corrective action. If the symptom observed is not covered, report the
problem to a Level II or III maintainer (Direct Support, Intermediate Maintenance, or Factory Warranty Support).
Faults can be detected by the Built-In Test (BIT) or visual observation.

5.2.1 Troubleshooting Procedures

Self test faults are displayed on the Antenna Status page. The following paragraphs identify probable failure causes,
and suggested corrective actions.

5.2.1.1 Power-on BIT Faults

BIT faults are saved following an power-on BIT and are displayed on Antenna Status page.

5.2.1.2 Operator-Initiated BIT Faults

BIT faults are displayed following an operator-initiated BIT. For information on running BIT, refer to

Paragraph 4.3.7. When a fault message is displayed, record all fault code information and report the fault to a Level

II or Level III maintainer.

5.2.1.3 Run-Time Faults

Run-Time faults mostly occur due to programming errors and are listed in Table 5-3. Sometimes hardware failures
can cause run-time failures. Send the radio to a level II or III repair facility for hardware failures.

Table 5-3. Run-Time BIT Faults, Descriptions, and Corrective Action

Text Message Description/Corrective Action

Hot, Very Hot, Very Very Hot, Too Hot Temperature warnings. Hot = warning, Very Hot = reducing

functionality, Very Very Hot = shutting down calls, Too Hot =
imminent shutdown.

Personal Identification Number (PIN) Required Enter a 4-8 digit PIN to enable non-emergency functions.

Personal Unblocking Key (PUK) Required Enter a 4-8 digit PUK to revert Subscriber Identity Module

(SIM) to the original unlocked state.

5.2.1.4 Non-BIT Faults

Non-BIT faults are operator-observed failures, or cases of degraded operation. Locate the observation in the first
column of Tabl e 5-4 and follow the recommended action. If the recommended action is unsuccessful, report the fault
to a Level III maintainer.

5-2

SCHEDULED MAINTENANCE

R

Table 5-4. Non-BIT Troubleshooting

Observation Action

BGAN terminal does not power on. Check batteries and/or power source.

Check cable connections.

RF-7800B

Battery Box not supplying power.
Applies to the RF-7800B-DU024 only.

Integrated Services Digital Network (ISDN) calls are not
accepted.

Check Fuse F1, F2 (Automotive Blade, 5 A 32 V).
Check Batteries.

The Mobile Subscriber Number (MSN)
programmed into the ISDN device does not match
the MSN programmed into the terminal.

ISDN calls are not being made. The ISDN interface is turned off (the interface turns

off automatically when the terminal is operating
from battery power, or if no ISDN device is
detected within five minutes from power on).

BGAN terminal is connected to the BGAN network, but
cannot obtain the requested Quality of Service.

Terminal does not obtain a Global Positioning System (GPS)
fix.

The BGAN terminal is not optimally pointed at the
satellite. Re-point the terminal.

BGAN terminal location limits visibility of four or
more GPS satellites. Move the terminal to a
location where there are few obstructions.

BGAN terminal makes a continuous beep when an ISDN
device is connected to the ISDN port.

The ISDN device is trying to draw too much power
from the BGAN terminal's ISDN interface. Make
sure it is an ISDN device that draws less than 70
mA of current at 40 V (equivalent power 2.8 W). It
might be an Ethernet device.

The terminal will not register with the BGAN Network.

 When viewing the terminal's Web interface, does the

terminal have a 3D GPS fix?

The BGAN terminal requires a GPS fix to
determine the correct Rx and Tx radio frequencies
to use.

The terminal will not register with the BGAN Network.

 Does the terminal have a clear line of sight to the

satellite?

The terminal will not register with the BGAN Network.

 Are you in a geographical location where two BGAN

satellites have coverage?

Using the BGAN terminal's Web interface, wait for
the terminal to acquire a 3D fix. Attempt to move
the terminal to a location with a more open view of
the sky. Once the unit has acquired a GPS fix, it can
be moved into a more sheltered location nearby.

Move the terminal to a more open location. In urban
environments, buildings produce regions of signal
reflection and fade that can result in strong signal
readings, but which introduce sufficient noise to
prevent communication. In such conditions, often
moving the terminal only a couple meters can fix
the problem.

The Land Mobile SATCOM-on-the-Move terminal
will automatically search for the best satellite
connection, but your position may be blocking the
view to the nearer satellite. You can force the
terminal to search for the other satellite by changing
the 'Satellite Selection' setting on the Web interface
Setup page from 'AUTO' to the desired satellite.

5-3

RF-7800B

R

SCHEDULED MAINTENANCE

Table 5-4. Non-BIT Troubleshooting (Continued)

Observation Action

The terminal will not register with the BGAN Network.

 Is the 'Satellite Selection' configured with the

appropriate setting?

Using the Web interface on the Properties screen, the
terminal shows the "Registration Status" as "Registered", but
the "PS Attach" status as "Not Attached".

The Packet Data Protocol (PDP) context activation attempt
fails because the requested static Internet Protocol (IP)
address is in use or otherwise unavailable.

 Are you requesting the correct static IP address?

The PDP context activation attempt fails because the
requested static IP address is in use or otherwise unavailable.

 Is the requested IP address permitted in your current

location?

The 'Satellite Selection' allows for specification of
the satellite to use. This can be configured to use a
specific satellite, or to automatically locate the most
appropriate one.

If a specific satellite is selected, ensure that it is
within your field of view. Alternatively, select
'AUTO' if the specific satellite is unknown.

Is your BGAN subscription valid?

The most common cause for a failure to PS Attach
is that your BGAN service provider is denying you
service. Contact your BGAN service provider to
ensure the subscription is valid.

Confirm you are using the correct Access Point
Name (APN), username, and password to obtain the
desired IP address. These parameters may vary
based on your geographical location. Check with
your BGAN service provider.

The use of static IP addresses is specific to
geographical regions. Your BGAN service provider
will provide the details. Confirm that you are
requesting the correct static IP address for your
current geographical position.

The PDP context activation attempt fails because the
requested static IP address is in use or otherwise unavailable.

 Was the last context activation made to the requested

IP address properly deactivated?

The BGAN system is designed to allow for short
outages in the connection link between the terminal
and the satellite. For example, when the vehicle
with a BGAN terminal drives behind a building, the
BGAN system will allow the Background PDP
connection to remain broken for one hour. During
that one hour the IP address remains assigned to
that context. (Note, if you remove DC power from
the BGAN terminal without properly deactivating a
context, the BGAN Network will keep the IP
address for that context allocated to that BGAN
terminal for one hour. Moving the Land Portable
power switch to OFF will correctly deactivate the
PDP context before shutting off power to the unit.)
You can power the terminal back on, reactivate the
context, and then properly deactivate it to release
the IP address. Alternatively, wait one hour for
BGAN to release the IP address, or use a different
IP address.

5-4

SCHEDULED MAINTENANCE

R

Table 5-4. Non-BIT Troubleshooting (Continued)

Observation Action

RF-7800B

The PDP context activation attempt fails because the
requested static IP address is in use or otherwise unavailable.

 Is there network congestion in your specific spot

beam?

The terminal has power, but the Ethernet electrical link
indication is not present.

The terminal has power, but the Ethernet electrical link
indication is not present.

 Check computer settings.

The terminal Ethernet electrical link is present, but IP traffic
to the default IP address of the terminal gets no response.

 Was the IP address of the terminal changed from the

default?

The terminal Ethernet electrical link is present, but IP traffic
to the default IP address of the terminal gets no response.

 Is the DHCP server feature enabled in the terminal?

It is possible during periods of heavy network usage
that the network is too busy to grant a PDP context
request.

Continuously retry activation attempts. As soon as
the network is able to grant you a PDP context, it
will. Additionally, your BGAN Service Provider
can determine if the problem is due to network
congestion.

Verify that the MIL Data Connector on the cable is
fully connected to the MIL Data Connector on the
BGAN terminal. The red outline on the BGAN
terminal connector should not be seen when fully
screwed in.

Cable 12043-0834 contains both a female ISDN
and a male Ethernet connector. Ensure the correct
connector is used.

Ensure that the Ethernet Device is properly
configured on your computer. Refer to

Paragraph 2.6 Initial Turn-On / Check.

Retry the communication using the correct IP
address for the terminal. If the address was changed
and forgotten proceed to the actions below to
recover the IP address of the terminal.

Configure the communicating device to use
Dynamic Host Configuration Protocol (DHCP).

The terminal Ethernet electrical link is present, but IP traffic
to the default IP address of the terminal gets no response.

 Was the embedded DHCP server turned off?

Configure the communicating device to use DHCP.

If the BGAN terminal was changed to a static IP
address, and that IP address was forgotten, remove
the Universal Mobile Telecommunications System
Subscriber Identification Module (USIM) card,
then power the terminal up. With the USIM
removed, the terminal will automatically enable the
DHCP server feature. This will allow a directly
connected computer to use DHCP to receive an
address from the BGAN terminal, as well as allow
the computer to reconfigure the BGAN terminal
appropriately.

Ensure that the computer is configured to be in the
same subnet as the terminal if the terminal is not
configured for DHCP. If DHCP is enabled on the
terminal, ensure that the computer got an IP
Address from the BGAN terminal. Refer to

Paragraph 2.6 Initial Turn-On / Check.

5-5

RF-7800B

R

SCHEDULED MAINTENANCE

Table 5-4. Non-BIT Troubleshooting (Continued)

Observation Action

The PDP context is active, but data will not flow over the
connection.

The PDP context is active, but data will not flow over the
connection.

 Does your Local Area Network (LAN) route packets

between the Local IP Address and the BGAN terminal?

I can't hear pointing tones on my RF-7800B-DU when the
switch is in the audio position

On the 'PDP-Contexts' Web interface page, confirm
that the Local IP address of the active context
matches the IP address of the device attempting to
send data.

Only packets sourced from the Local IP Address
will be allowed to pass over the PDP context
created.

If the addresses do not match, you must deactivate
the context and create a new one with the correct
Local IP Address. Note that when using DHCP
from the computer, the computer IP address may
change.

Confirm you network configuration is correctly
routing packets between the Local IP Address of
the active context to the BGAN terminal.

Check the 'Bypass Antenna Pointing' setting on the
Web interface Setup page.

The 'Auto Power On' setting might be disabled on
your terminal. Use the switch to power off the
terminal and power it back on. Check the 'Auto
Power On' feature setting via the Web interface.

When the 'Auto Power On' feature is enabled, the
terminal will automatically power on when power
is applied to the unit and the power switch is not in
the OFF position. This feature allows for automatic
reboot of the terminal following an unexpected
power failure.

What frequency is my BGAN terminal transmitting on? Check the Web interface 'Antenna' page.

It varies slightly by location. Register and create a
PDP context with the terminal. Then check the
'Antenna' page on the terminal's Web interface for
your spot beam frequency. This is the frequency
that user data is transmitted on.

5-6

SCHEDULED MAINTENANCE

R

Table 5-4. Non-BIT Troubleshooting (Continued)

Observation Action

RF-7800B

My RF-7800B-DU does not seem to turn on when power is
applied.

The BGAN terminal was online, but has since been placed
offline (Not Registered) without user intervention.

 Has the view of the satellite become obstructed?

The BGAN terminal was online, but has since been placed
offline (Not Registered) without user intervention.

 Was there any data sent over the connection for 12

hours?

The BGAN terminal was online, but has since been placed
offline (Not Registered) without user intervention.

 Did you reach the data limit for your BGAN

subscription?

Check if the 'Auto Power On' feature is enabled on
the Web interface 'Setup' page.

The 'Auto Power On' setting might be disabled on
your terminal. Use the switch to power off the
terminal and power it back on. Check the 'Auto
Power On' feature setting via the Web interface.

When the 'Auto Power On' feature is enabled, the
terminal will automatically power on when power
is applied to the unit and the power switch is not in
the OFF position. This feature allows for automatic
reboot of the terminal following an unexpected
power failure.

Restore a clear line of sight between the terminal
and the satellite. The connection will automatically
be restored if the interruption was less than one
hour.

The BGAN system will automatically deactivate a
context that has not sent any data for 12 hours.
Manually reactivate the PDP Context.

If desired, enable the '24/7 PDP Context Keep
Alive' feature on the 'Setup' page of the Web
interface to keep unused connections active longer
than 12 hours.

To limit BGAN expenses, USIM cards can be
commissioned to have a daily/weekly/monthly
traffic or monetary limit.

Contact your USIM administrator to obtain more
air-time. Check with your BGAN Service Provider
to determine if this was the cause.

5.3 BATTERIES

The BGAN Battery Box Kit 12091-4010-01 can use one of the following batteries:

 BA-5590/U Lithium Sulfur Dioxide (Li-SO2) non-rechargeable

 BA-5390/U Lithium Manganese Dioxide (Li-MnO2) non-rechargeable

 BB-590/U Nickel-Cadmium (Ni-Cd) rechargeable

 BB-390A/U Nickel-Metal Hydride (Ni-MH) rechargeable

 BB-390B/U Ni-MH rechargeable

 BB-490/U lead-acid rechargeable

 BB-2590/U Lithium-Ion (Li-ION) rechargeable

5-7