Comtech EF Data IPSat GW1000 - Manual (Page 19)

01-0945-401 Rev. A 08/2004 9
Most of the IPSat GW1000 configuration can be performed with the Basic Configuration Menu. The parameters are
defined as follows:
IP Address: Used to identify the IPSat GW1000 on the network and is usually defined by your service provider
Subnet Mask: Used by the IPSat GW1000 in conjunction with its IP address to make forwarding decisions and is
usually defined by your service provider.
Default Gateway: Used in situations where one or more routers exist on the IPSat GW1000’s subnet accessible
through the Ethernet interface. When a packet is received from the DVB channel and the IPSat GW1000 determines
that the packet contains a destination IP address that is not on its own subnet, the IPSat GW1000 forwards the packet
to a gateway. The gateway is chosen by searching the static routes that have been defined; if no static route exists to
handle the destination network, the packet is forwarded to the default gateway. Note: The default gateway (and static
route) configuration only applies to forwarding decisions made on packets received by the DVB port (demodulator
or receive port), not packets received by the Ethernet port. Packet received by the Ethernet port that contains an
unknown destination network will be forwarded out the HDLC port (modulator or transmit port).
MPEG PID 1: When a PID (Program Identifier) value is entered, the IPSat GW1000 will accept and process all
traffic received by the DVB port (demodulator or receive port) that contains the PID value. At least one PID must be
entered to receive DVB traffic and is usually defined by your service provider.
Subscribed Rx BW: Enter the amount of bandwidth that the IPSat GW1000 is subscribed to receive from the
service provider. The IPSat GW1000 uses this parameter to accurately reflect the network activity on the front panel
display.
RC-Rx coding rate: Sets the type and rate of the FEC (Forward Error Correction) decoding performed by the
demodulator. Defined by service provider. Default is Vit 2/3.
RD-Rx Data Rate: Sets the data rate in bps (bits per second) that the demodulator receives at and is usually defined
by your service provider. The Rx Symbol Rate is automatically determined by the Rx Coding Rate and the Rx Data
Rate.
RS-Rx Frequency: Sets the L-band frequency in Hz (hertz) that the demodulator receives at and is usually defined
by your service provider.
TC-TX Coding Rate: Sets the type and rate of the FEC (Forward Error Correction) coding performed by the
modulator. Defined by service provider. Default is Vit 1/2. Note: When the service provider is using Radyne
ComStream’s MRT (Multiple Receiver Terminal), the TX Coding Rate must use the DVB symbol-mapped Viterbi
types (DVB 1/2, DVB 3/4, DVB 7/8) or the sequential types.
TD-TX Data Rate: Sets the data rate in bps (bits per second) that the modulator transmits at and is usually defined
by your service provider. The TX Symbol Rate is automatically determined by the TX Coding Rate and the TX Data
Rate.
TS-TX Frequency: Sets the L-band frequency in Hz (hertz) that the modulator transmits at and is usually defined
by your service provider.
TP-TX Power Level: Determines the power level in dBm (decibel-meter) that the modulator transmits at. Default is
0.0dbm.
EM-Modulator: Enables or disables the modulator. It performs the same function as pressing TX Enable on the
front panel. Default is disabled.
HP-10 MHz Reference: Enables or disables 10 MHz BUC (Block UpConverter) reference frequency. Default is
disabled.
MIV-24 Volt Output: Selects the source for the power to the BUC (Block UpConverter). Choices are disabled,
enabled internal and enabled external. Default is disabled. Note: Enabled internal has a maximum of 24vdc at 3
AMPS.
AE-Modulator Auto Enable: Used to automatically return the modulator, 10 MHz and 24vdc to previous state
upon power-up or reset when set to Auto; otherwise, when set to manual, the modulator must be manually enabled
upon power-up or reset. Default is Manual.
PC-Pure Carrier: Enables or disables the transmission of an unmodulated carrier (continuous wave) out of the
modulator. The pure carrier signal is used for diagnostic and installation procedures. Default is disabled.
Once all of the parameters have been configured, press the Esc key. A reset may be required for some of the settings
to take effect. If this is the case, the IPSat GW1000 will reset itself after displaying a user prompt.
Refer to the Console chapter for more information about configuration and monitoring tasks and utilities that are
available.