Ericsson TT1222 Guia do Utilizador Página 44

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Options
3.2.5 Setting Up the QPSK Input
Setting up the QPSK input is done entirely from the SETUP INPUTS menu.
Table 3.5 steps through all the necessary settings to achieve signal lock.
Table 3.5: Tuning the Satellite Receiver
Step Action Result
1.
Go to the input menu, located
under the setup menu.
The display will read “SET: INPUT” on the
top line.
2.
Repeat pressing the up arrow, until
you are on the top line
The display will read “LNB Freq.:” on the
bottom line.
3.
Press right once, and then by using
the arrow keys as explained in
Chapter 4, enter the desired LNB
frequency.
The LNB frequency should be set to match
your external LNB.
4.
Go down one line, and edit the
satellite channel frequency
1
.
This sets up the tuning frequency in the
receiver.
5.
Go down to the next line, and enter
the Symbol rate.
This sets up the incoming symbol rate of
the demodulator.
6.
Continue on-line down to the Inner
Code rate, select the correct inner
code.
This sets up the Forward error correction
(FEC) rate of the demodulator.
7.
For the final three items, select the
correct LNB voltage, and turn 22
kHz control signal and spectrum
inversion on or off.
This finalises the set-up of the satellite
demodulator. Next to the menu name
(SET:INPUT), status information about the
signal lock is being displayed. (Signal
strength.)
3.3 Hardware Enabled Output Options
3.3.1 ASI Output (TT1222/HWO/ASI/OUT)
3.3.1.1 General
The ASI Output option provides a single ASI output on a BNC connector.
3.3.1.2 Connector Details
75 Ω BNC connector.
1
The satellite frequency should be within the area of the LNB frequency (±950 to 2150 MHz). If your frequency is outside this range, replace
your LNB with a higher or lower ranging unit.
EN/LZT 790 0002/2 R1A
3-6
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