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Chapter 5 Web GUI Setup and Monitoring
4
Click the Use RF 1, Use RF 2, Use RF 3, or Use RF 4 radio button to select an RF
input to activate.
5
In the Tuning area, enter the current operating downlink frequency used by the
transcoder for tuning the received digital signal in the Downlink Frequency
field. You can enter a value in the range from 0.0 to 15.0 GHz.
6
In the Symbol Rate field, enter the symbol rate that matches the transmitted
signal. You can enter a value in the range from 1.0 to 45.0 Ms/s for DVB -S, 1.0 to
30.0 for DVB-S2 if Pilot Present is set to Yes on the front panel, or 5.0 t o 30.0 for
DVB-S2 if Pilot Present is set to No on the front panel.
7
From the FEC drop-down list, choose the Forward Error Correction inner code
rate. The FEC rate must match the FEC of the transmitted signal. You can select
1/2, 2/3, 3/4, 5/6, 7/8, or Auto.
8
From the Modulation drop-down list, choose the modulation type for the
received signal (DVB-S or DVB-S2).
9
From the Roll Off drop-down list, choose 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 From the IQ drop-down list, choose the input signal spectrum inversion setting,
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 From the RF1 Power drop-down list, choose 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 area, 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.
146
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