Cofdm Impulsive Response (Echoes Detection) - Promax PROLINK-4/4C Premium Manual De Instrucciones

USER'S MANUAL. PROLINK-4/4C
Figure 30.- Constellation Diagram of a DVB-64 COFDM fair digital signal.
The PROLINK-4/4C
extend the presentation to only a quadrant between four available ones. Press the key
repeatedly to change of quadrant and to switch on or off the zoom function. It
allows so, a more detailed analysis of the observable effects and facilitates therefore
the accurate diagnosis about causes or agents responsible for the digital signal
deterioration (see figure 31).
Figura 31.- QAM-Constellation Zoom function.

4.9.1.5.7 COFDM impulsive response (Echoes Detection)

To select the COFDM impulsive response:
1) Select the TV operating mode. If present operating mode is the spectrum analyser
mode press key
2) Select the terrestrial band for the measurement of COFDM modulated signals.
Available frequency ranges are:
COFDM signals
06/2005
Premium
Premium incorporates in addition, the ZOOM function to
[21].
40 MHz to 862 MHz
Page 57