Kathrein UFO 356/TP Manual De Instrucciones página 16

5 Selecting the modulation signal for the QAM modulator
Twin I
Inp. K10
Outp. S21
6.900 MS/s
Main menu
The modulation signal for the QAM modulator is selected in the QAM stage sub-menu.
Press the (sub-menu) key to switch to the sub-menu and use the "+" and "-" buttons to make the required setting.
The following settings are possible:
• "DVB-T-Sig" Normal operation, DVB-T input signal is transmodulated,
no output signal if input signal is disrupted
• "DVB-T-PRBS" Normal operation, DVB-T input signal is transmodulated, output signal switches to PRBS-23
(output spectrum remains the same) if input signal is disrupted.
• "PRBS" PRBS-23 test signal, regardless of input signal, normal operation not possible
• "CW mode" Test signal for levelling with ordinary meters, normal operation not possible
If the CW signal is switched on (only selectable in Twin I), a fi xed level sine carrier is output at both channel
units (both at Twin I and Twin II).
The output symbol rate can be set in "PRBS" operating mode (e.g. 6.875 MS/S, also see "Setting the output symbol rate").
Twin I
Outp. S21
6.900 MS/s
Main menu in PRBS mode
In "DVB-T-PRBS" operating mode, the channel unit automatically outputs PRBS if it cannot register the set DVB-T signal. The
output symbol rate set previously is used.
When the input signal can be demodulated again, the channel unit switches back to transmodulation.
When the channel unit outputs the PRBS substitute signal in "DVB-T-PRBS" operating mode, the asterisk (*) appears on the
controller:
Twin I
Inp. K10
Outp. S21
6.900 MS/s
Main menu, display in DVB-T-PRBS mode
TP
212.5 MHz
306.00 MHz
64 QAM
PRBS
306.00 MHz
64 QAM
* TP
212.5 MHz
306.00 MHz
64 QAM
*** UFO 356/TP-I
Modulation
Spectrum
QAM stage sub-menu
*** UFO 356/TP-I
Modulation
Spectrum
QAM stage sub-menu, PRBS setting
*** UFO 356/TP-I
Modulation
Spectrum
QAM stage sub-menu, DVB-T-PRBS setting
***
DVB-T-Sig
normal
***
PRBS
normal
***
DVB-T-PRBS
normal