DS2460Q QAM Analysis Meter Operation Manual
90
value. User need according to the local environment
to estimate the measuring range.
The second step is setup PLUSE (PULSE bandwidth).
The shorter the test distance, the narrower the pulse
width; the longer the cable / line distance tested, the
wider the pulse width. The last one parameter is
RATIO (Velocity of Propagation). The velocity of a
signal in free space is the speed of light or 2.997925 x
10
8
m/s (this is generally accepted to be approximately
3x10
8
m/s. The velocity of a signal in a medium is less
than that in free space and is dependent on the
permeability and permittivity of the materials.). The
manufacturer should provide the velocity of
propagation of coaxial cable. Press the button
[START], start the measurement.
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