Using the Equipment
Note: The Boosted options increase the voltage slightly to account for the voltage
drop that occurs down long cable runs from the IRD to the LNB. This feature
is not supported by the DVB-S2X card.
• LNB 22 kHz – This check box enables the LNB 22 kHz signal to be activated.
Enabling the 22 kHz tone will command the LNB to switch to its high band local
oscillator frequency.
• Spectrum Sense – Allows the satellite card to determine if the incoming satellite
signal has been frequency inverted due to the relative frequencies of the local
oscillator and modulated frequency (high side or low side local oscillator) either
at the up-link or at the down-link.
• Mapping Mode – This option allows the IRD to determine the power of the
received constellation points relative to an unmodulated carrier or DVB-S2 pilot
tones. For single carrier transmissions where one carrier occupies the whole
transponder the optimum setting is PEAK POWER. For multi-carrier
transmissions where multiple carriers are transmitted within one satellite
transponder then MEAN POWER should be used.
Note: The Mapping Mode is only applicable to DVB-S2 16APSK or 32APSK and
not available to the DVB-S2X card.
• Roll-Off – Enables the selection of a roll-off rate from a drop-down menu.
Available options are 20%, 25%, 35%. Tighter roll-offs (20%, 25%) are only
defined for DVB-S2 modulation. These tighter roll-offs allow a higher symbol rate
to be used within a given allocated bandwidth. The DVB-S2X card provides the
options: AUTO, 5%, 10%, 15%, 20%, 25% and 35%.
• MIS Filter – Enables or disables Multiple Input Stream (MIS) filtering and is not
applicable to DVB-S mode. Multiple Input Streams allows multiple independent
transport streams in one satellite carrier. When enabled a single transport
stream is filtered out of the baseband frames based upon the Input Stream ID
(ISI). This should be disabled for single stream carriers.
• Input Stream ID – Defines the Input Stream ID (ISI) filter value when the MIS
Filter is enabled. Only streams with this ISI value will be output, thus a non-
matching ISI value will result in zero bit rate being detected by the RX8000 and
will raise TS Unlock alarms.
3.10.4.7 Front Panel Setup
3.10.4.7.1 Source 1 Configure
This menu provides sub-menus that enable viewing and configuration of various
Source 1 Input 1 parameters. To access this function, press the (Down) key.
SOURCE 1 |CONFIGURE Input 1 (L-band)
3.2.2 |(UNLOCKED) >
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