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Operating the Equipment Locally
Reference Guide: TT128x High Definition Professional Receiver/Decoder
Page 3-9
ST.RE.E10141.5
3.6.3 DVB-S2 Satellite Receiver (TT1280/HWO/DVBS2
and TT1280/HWO/DVBS2/IF/CONST)
Table 3.8: Setting Up the DVB-S2 Satellite Receiver
Step Action Result
1 Go to Menu 2.3 and select SOURCE 1. The Receiver can take its signals from four sources. Set up
source 1.
2 Scroll to Menu 2.3.2. Enter the LNB
FREQUENCY then press Save.
This sets up the LNB frequency for the selected Source in MHz.
3 Scroll to Menu 2.3.2.1. Enter the
SATELLITE FREQUENCY then press
Save.
This sets up the Satellite frequency for the selected Source in MHz.
4 Scroll to Menu 2.3.2.2. Enter the
SYMBOL RATE then press Save.
Sets the symbol rate for the selected Source in Msymbols/s.
5 Scroll to Menu 2.3.2.3. Enter the DVB
Modulation Standard then press Save.
This sets up the DVB modulation Standard (DVB-S or DVB-S2).
FEC detection is automatic. In DVB-S2 mode the demodulator
automatically detects and locks to both QPSK and 8PSK
constellations.
6 Scroll to Menu 2.3.2.4. Enter the ROLL
OFF then press Save.
Sets the Roll Off of the demodulator Root Nyquist Filter. Choose
between 35%, 25%, 20%. This value should match that set in the
transmitting modulator.
7 Scroll to Menu 2.3.2.5. Enter the
SEARCH RANGE then press Save.
This sets up the centre frequency Search Range for the selected
Source in kHz.
8 Scroll to Menu 2.3.2.6. Enter the LNB
POWER and VOLTAGE settings then
press Save.
Sets the LNB power for the selected Source (ON, OFF, BOOSTED).
BOOSTED provides 1V extra power over the ON setting. Also sets
the LNB voltage settings (18v – Horiz, 13v – Vert).
9 Scroll to Menu 2.3.2.7. Enter the LNB
22 kHz setting then press Save.
Enables or disables the LNB 22 kHz control tone for the selected
Source (On, Off).
10 Repeat steps 2 through 9 for input 2 to 4
DVB-S2 Input Option Card TT1280/HWO/DVBS2/IF/CONST
The DVB-S2 demod option TT1280/HWO/DVBS2/IF/CONST offers three
L-band inputs plus an IF input. If this input option card is fitted in the
receiver then note that Menu 2.3.5 sets the IF input frequency. LNB
Frequency, Satellite Frequency and LNB Power parameters are not
applicable for this input.
The DVB-S2 demod option TT1280/HWO/DVBS2/IF/CONST also offers a
constellation output in DVB-S2 mode. This output can be enabled for each
L-band/IF input from the menu 2.3.X.6. Enabling this mode disables the
demodulator transport stream rendering the receiver unable to decode a
service.