DTE-3114 – Networked Quad QAM Modulator
USER
MANUAL
11
If the reset button is hold down for more than three seconds, the DTE-3114 will enter failsafe mode,
see section 2.6.
2.4 Thermal considerations
The DTE-3114 is designed to operate with cooling by natural convection, without active cooling
facilities. However, the following considerations have to be taken into account:
The unit must always be mounted vertically to allow bottom-to-top airflow.
The units must be installed in such a way that airflow is not obstructed. In no case the vent
holes should be covered when the DTE-3114 is enabled.
If multiple units are mounted next to each other on a rail, the units should be spaced at least
0.5cm apart.
The ambient temperature should be lower than 35˚C / 95˚F. If this condition cannot be met,
forced air cooling should be applied with a vertical-flow fan unit mounted below the units.
A thermal shutdown mechanism is in place to avoid overheating of the unit. If the internal
temperature of the DTE-3114 rises above 85˚C / 185˚F, the RF output of the device will be
disabled.
2.5 IP address assignment
Within a network each connected device needs to have a unique IP address to enable reliable
communication between the devices. If multiple devices would have the same IP address, conflicts
may occur and communication becomes unreliable. The IP addresses in a network can be
configured by the user with fixed unicast IP addresses or via a DHCP server on the network.
Upon applying power, the DTE-3114 will try to connect to a DHCP server to obtain an IP address,
unless a static IP address has been configured. In the latter case, the DTE-3114 will start with the
configured static IP address.
If no static IP address has been configured and no DHCP server is running (or if the DHCP server
cannot be reached) the DTE-3114 will automatically assign itself an address in the range from
169.254.1.0 to 169.254.254.255 (Link-local address, RFC 3927) with subnet 255.255.0.0.
The selected IP address is shown at the bottom of the illuminated LCD display on the DTE-3114. The
IP address is interchanged with the MAC address every few seconds.
Note: The MAC address can also be found on the label attached to the DTE-3114, above the
network connector.
A web browser on the same subnet can now be used to connect to the unit, by using the IP address
as URL, e.g. http://192.168.1.10/. For easy access to a specific DTE-3114, the IP address can be
added to the list of browser favorites and given a name.
When you have access to the web pages of the DTE-3114 web interface, you can – if you want to do
so – assign a static IP address and subnet mask via the Network settings tab. The default gateway
can be specified, too, but this is not required.
