Terrestrial band Satellite band
Figure 72.-
Options for the BER measurements
The window that opens when any of the modulations is selected is the same, however the type
of modulation varies:
Figure 73.-
BER measurement window
To indicate if the CBER measurement is at an acceptable threshold, the colour of the bars
varies. When the CBER is red, this indicates that the signal quality is bad. When the CBER
measurement is yellow, this indicates that the signal quality is acceptable but it would be better
to improve it. If the CBER measurement is green, this indicates that the signal quality is good.
It is very important to take into account that the CBER parameter determines quite clearly
the quality of the installation. This is why we have simplified the interpretation of this
parameter with these colours. The VBER is a parameter that has practically only got two
states, either very good or very bad, which makes it difficult to use to appropriately
evaluate the installation. This is why we recommend using the CBER status to assess the
quality of the installation (it should be a small as possible).
If the meter does not dispose of this option, in the MER measurement, "Option" will appear.
BER before Viterbi
Available services
BER after Viterbi
While the meter is unlocked, the
following message will appear:
UNLOCK
.
After a few seconds, the
message will disappear and the
BER measurement appears.
Type of modulation
Tuned channel
3.3.3.2.2.4.1
3.3.3.2.2.4.2
3.3.3.2.2.4.3
Multimetter FSM 500
Ref. 5903
64