TechniSat SkyCable DVB-S2/QAM QUAD - Handbuch (Seite 26)

26
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MONT_SkyCable_DVB-S2_QAM_QUAD_DE_EN_print.doc 09.08.2012 08:55 Seite 26
2.1.4 Display Line 3
Select line 3 as described in 2.1.2
If the flashing cursor is located in the third line the following sub-items can
be called up by repeatedly pressing the Menu button:
1. RF Frq:306,00MHz = RF output frequency
2. RF Attn:00dB = RF T-pad attenuator
3. QAM SR:6900KB = Output symbol rate
4. QAM Mode:256 = Modulation process
5. I/Q Inver:YES = Invert modulation spectrum
6. Modulation:YES = Modulation On/Off
1. RF Frq:306,0MHz RF output frequency
The frequency output is entered in MHz using the numeric buttons. This is
the channel centre frequency in QAM signals. The correct frequencies
can be taken from the table in section 4.2.
The data is transferred when the OK button is pressed.
All 4 QAM channel are converted in block.
The output frequency can set only in channel A and the channels B, C and
D are emitted to each other moved.
Example: Channel A = 306 MHz
Channel B = Channel A + 8 MHz = 314 MHz
Channel C = Channel B + 8 MHz = 322 MHz
Channel D = Channel C + 8 MHz = 330 MHz
2. RF Attn:00dB RF T-pad attenuator
The attenuation value for the output level is entered using the numeric
buttons. A max. 9dB can be set.
The data is transferred when the OK button is pressed.
Watch the linearity of the wanted signal level for all the cards and adjust
the output level by setting it to the RF T-pad attenuator, while watching the
level parameters (see section 4.3).
3. QAM SR:6900KB Output symbol rate
The symbol rate is entered using the numeric keys. You can input between
2000 and 7200 kbaud.
The data is transferred when the OK button is pressed.
The symbol rate is in relation to the channel bandwidth.
Ä 7 MHz wide channel = 6000 kbaud symbol rate.
Ä 8 MHz wide channel = 6900 kbaud symbol rate.
The symbol rate can select only in channel A and is valid for all 4 QAM
channels.
02:QPSK->QAM A
Tuner Lock:Yes
RF Frq:306,0MHz
P010,010,110,005