Adtec RD-71 User Manual page 18

RF Rx Menu (LB Option)
Item Function
Tuner State Enables or Disables RF input.
note:​ When RF1 and RF2 are both enabled,
maximum tuner performance is affected. Please
view ​ t able​
modcod resource limitations.
Downlink Allows 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.
The Downlink and Local Oscillator frequencies
can be used to determine if spectrum inversion
occurs using the following rules. If the Downlink
frequency is less than the Local Oscillator
frequency, then spectrum inversion does occur.
If the Downlink frequency is greater than the
Local Oscillator frequency, then spectrum
inversion does not occur.
Local The Local Oscillator (L.O.) control specifies the
Oscillator 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 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
Acquisition Acquisition Range is defined as the range of
Range 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.
in Appendix A for symbol rate and
18
Options
DISABLED
ENABLED
Range dependent upon LO
configuration
C: 5150
KU: 11300
KU: 10750
KU: 10600
KU: 10000
KU: 9750
KU: 9600
C: MANUAL
KU: MANUAL
950MHz - 2150MHz
0 - 5MHz