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7849B – 7859B – 7817B
16 Multipath / Guard interval
Available only for DVBT/T2 or DVB-C2 standards.
Pressing
allows you to access to Multipath / Guard interval measurement.
Signal without echo
Signal with echoes and pre-
echoes
Pressing
changes the horizontal scale (distance).
Horizontal scale can be set in µs, km or miles by pressing
Moving measurement arrow
can be done by screen touch, or by automatic search keys
and
.
The end of the guard interval is displayed with a yellow line.
Reminder :
Remember: In terrestrial TV broadcasting, the received signal on the antenna comes from several possible
ways: the echoes.
In digital TV DVB-T/T2, these echoes may help or degrade the image according to the time delay between
the various signals that reach the antenna.
p.
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