18
Also, there is more translation going on. RG6 coax that connects the DWx000 to the dish
LNBF receiver and transmitter is a very efficient and wide band capable medium. It can
not transmit the Gigahertz frequencies required for satellites any great distance though.
The LNBF and DWx000 communicate in the L-Band. This is the normal RF band around
960Mhz. The LNBF steps down the Gigahertz received signal to the L-Band and
transmits it to the DWx000 satellite in port. The DWx000 transmits through the satellite
out port using the L-Band to the dish mounted transmitter. The transmitter steps up the
transmitted signal to the Gigahertz frequency required and then broadcasts it down the
long square tube that wraps from under the LNBF arm up to the focal point lens. This is
an interesting point because microwave signals are reflected and bent from the transmitter
to the focal point through air – no wire carries such a high frequency signal in this set up.
The System Status screen has two important indicators. TxCode and RxCode. Normal
indication is TxCode=8 and RxCode=5. Transmit status is the key indicator for Direcway
systems. They are designed to shut down at the first indication that there is any problem
in the transmit portion of the satellite connection. This is critical because the system can
not be allowed to transmit to the incorrect satellite or to the correct satellite in such a
manner as to corrupt other data traffic to the satellite.
The System Info screen will give support centers the information needed for them to
isolate your data traffic on their intranet for problem tracking.
We have run into only two TxCode (s) that are of special note. First, a TxCode of 17 may
be a signal that the DW6000 has entered a deadly embrace condition. There seems to be a
know software glitch that if the DW6000 locks on Tx17 it will require two actions to
correct. The first is to reset to factory defaults and the second is to replace the DW6000
so that its PRAM can be blasted. With a Tx17 lock a technician will have to be
dispatched to possibly replace the DW6000. Thankfully, this condition normally occurs
only during registration and a power interruption of the DW6000 during registration. But,
a Tx17 lock may occur for reasons unknown as of this writing. Unknown if this will
occur for DW7000 systems.
The second is a TxCode of 10 – Can not communicate with the NOC. This error can
occur if the transmitter is not properly grounded. It can be caused by the buildup of static
electricity at the transmitter. If you encounter a TxCode 10 then pull the power cable
from the back of the DWx000 and then touch the power cable’s outer metal jacketed
connector to each coax outer jacket of the RG6 cables plugged into Satellite IN and Out.
This will shunt the electrical buildup across the house ground. Next plug in the power
cable to the DWx000 and see if the TxCode 10 is alleviated. If it is, and if you have to do
this periodically you may be best served if you call a technician to properly ground the
satellite transmitter. If your area is suffering from a drought then you may just have to
live with the problem until water returns to your ground soil. Soil without water content
is a poor conductor for a ground.
(24 pages)
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