Adtec RD-71 User Manual page 47

symbol rate and modcod resource limitations.
Downlink​ - ​ A llows the operator to enter the satellite downlink frequency. The value for the
Downlink frequency is used with the Local Oscillator frequency to calculate the L-Band
frequency.​ L-Band = absoluteValue(Downlink - LO).
Local Oscillator​ - ​ T he Local Oscillator (L.O.) control specifies the frequency of the LNB
local oscillator. The standard L.O. frequencies for "C" and "Ku" bands are 5150MHz and
10750MHz respectfully although, some other variants are included. If the desired L.O.
frequency is not listed, select either C: Manual or Ku: Manual and enter the L.O. frequency
in the Manual L.O. field.
Manual LO​ - ​ A llows manual entry of the LNB Local Oscillator frequency provided that either
C: Manual or Ku: Manual is selected from the Local Oscillator pulldown menu.
L-Band​ - ​ A llows the operator to enter the L-Band frequency within the range from 950MHz
to 2.15GHz. The value entered in this field is used with the Local Oscillator frequency to
calculate the Downlink frequency using the following rules. If Downlink < Local Oscillator,
then Downlink - Local Oscillator = │L-Band│. If Downlink > Local Oscillator, then Downlink
- Local Oscillator = L-Band .
LNB Voltage​ - ​ T his control is primarily used in "Universal" LNB applications. The LNB
Polarity control allows for LNB polarization selection; the 13VDC source will select the
Vertical polarity and the 18VDC source will select the horizontal polarity. For typical "C" and
"Ku" band applications, the 18 VDC option is recommended.
LNB 22kHz Tone​ - ​ T his control is used only for Universal LNB applications. A universal LNB
can route the high or low band from either polarity to the IRD. The high band is selected by
enabling the 22 kHz tone and the low band is selected when the 0 Hz tone is enabled.
Advanced Configuration​ - The advanced configuration section is not automatically
displayed unless manual settings have been set, ie. symbol rate or DVB Type. Click the
'double down' arrow to manually configure additional parameters.
​
Acquisition Range​ - Acquisition Range is defined as the range of frequencies that the
tuner will scan in order to achieve carrier synchronization. This will allow the operator to
select the range of frequencies that the RF tuner will sweep through to acquire the carrier.
Valid Range: 0.5 - 5MHz.
S2X Roll-off​ - S2X Rolloff will allow the tuner to operate in an optimized mode for roll-offs
of 15% or less. When disabled, it will operate in standard 20% - 35% as defined by the
incoming S2 BBHeader. Due to modulation manufacturers providing backwards compatibility
during S2 to S2X migration, this must be manually configured for the best 5%, 10% and
15% roll-off performance. Advanced Status will still show 20% as it is inserted into the
baseband header by the modulator.
Type​ - ​ T ype Allows the selection of DVB-S or DVB-S2 Demodulation Type. If AUTO is
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