Adtec digital RD-70 (version 1.02.04) Manual - Manual (Page 17)

If the Downlink frequency is greater than the
Local Oscillator frequency, then spectrum
inversion does not occur.
Local
Oscillator The 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. C: 5150
KU: 11300
KU: 10750
KU: 10600
KU: 10000
KU: 9750
KU: 9600
C: MANUAL
KU: MANUAL
Manual LO Allows 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 Allows 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
950MHz - 2150MHz
Acquisition
Range Acquisition Range is defined as the range of
frequencies that the tuner will scan in order to
achieve carrier synchronization. Allows the
operator to select the range of frequencies that
the RF tuner will sweep through to acquire the
carrier. e.g. If the desired carrier is at 1.080GHz
and the Acquisition Range is set to 5MHz, the RF
tuner will sweep through 1.080GHz ± 2.5MHz to
acquire the carrier.
0 - 5MHz
S2X Rolloff 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.
DISABLED
ENABLED
LNB Polarity This 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.
OFF
H(18V)
V(13V)