Cisco D9824 Installation And Configuration Manual page 151

9 Select the Roll Off factor of the incoming signal (.20, .25, .35). Set the value to .20
or .35 when DVB-S modulation is used, and either of the three when DVB-S2 is
used. Use a small number to reject or filter carriers close to the same frequency.
10 Set the input signal spectrum inversion setting (IQ), which allows the operator to
track and select inverted and non-inverted digital signals. This is normally used
to automatically reject or filter out unwanted signals.
When set to Auto, signal is tracked and inverted for correct selection, as
required. When set to Opposite, the signal is always inverted. Conversely, when
set to Normal, the signal is not inverted.
11 The RF1 22KHz is only applicable for dual band applications. Select whether to
transmit the 22 kHz tone Local Oscillator control signal of RF1. The selections are
On, Off, or Auto. Select Auto to use the crossover frequency to determine if the
tone is transmitted.
12 In the RF1 Power drop-down menu, set the power output of RF1 to the external
Low Noise Block (LNB).
You can set the RF1 Power to Off, 13V, 18V, V-NIT or H-NIT. When RF1 Power
is set to V-NIT or H-NIT, it will use vertical and horizontal polarity until it is
automatically read from the NIT.
Note: Power will not be applied to the LNB when set to Off.
13 In the RF Input LNB Configuration section, for RF1, RF2, RF3, and/or RF4, set
the lower local oscillator frequency, in GHz, of the LNB in the LO1 (Ghz)
column. If it is a single band oscillator, set its frequency, in GHz. You can enter a
value in a range from 0.0 to 15.0 GHz. This value must be lower than the value
for LO2.
14 For RF1, RF2, RF3, and/or RF4, set the higher oscillator frequency, in GHz, of the
LNB in the LO2 (Ghz) column. If it is a single band oscillator, set this value to
0.0. You can enter a value in a range from 0.0 to 15.0 GHz. This value must be
higher than the value for LO1. In single-band LNB applications, set this value to
0.0.
15 Enter the Crossover frequency for RF1, RF2, RF3, and/or RF4. This is an internal
threshold frequency used for selecting the LO1 or LO2 frequency, depending on
the current downlink frequency settings. This option is only used in dual-band
LNB applications.
You can enter a value in a range from 0.0 to 15.0 GHz. In a single-band LNB
applications, set this value to 0.0.
16 Select the signal Polarisation setting (Horizontal, Vertical, or Automatic). This
setting is only applicable when the LNB Power is set to H-NIT or V-NIT. It marks
the polarity of the signal connected to the current RF input.
78-4039426-01 Rev D
Setting up Input Information
129