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DVB-T
83
zoom
on►
Press this button to enlarge the constellation diagram. The
upper left-hand section of the constellation diagram is now
represented and allows a closer look of signal symbols. By
pressing the button again, the original size of the constellation
diagram is represented.
Impulse response representation (Echo representation) (optional)
By means of the impulse response
representation, it is possible to measure
echoes in the transmission path or
multiple path reception. The green line (on
the left in the screen to dB) represents the
received used carrier. The other (red)
lines are echoes. For multiple path
reception, pre-echoes can also occur, if
an unwanted transmitter has a shorter
distance to the receiver as desired.
With the button „dist. km/µs,“ you can
switch the measurement between running
time and distance.
With the cursor buttons, ◄►, you can
move the yellow marker for measuring
the distance or the time and the level of
reflection.
Echo representation: marker display in µs
Echo representation: marker display in km