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Figure 62.-
Automatic C/N measurement. Channel tuning
Figure 63.-
Automatic C/N measurement. Frequency tuning
If in channel tuning mode, you will be able to see the channel with the carrier that is being used
to carry out the level measurement. As has already been explained in the section regarding the
V/A ratio measurement, if the equipment is in frequency tuning mode, the level measurement
will be carried out in the frequency that the user has tuned, and so it will be the user’s
responsibility to make sure that this frequency corresponds to the real channel carrier.
If the level bar is visible when the C/N measurement is being carried out (see section
3.3.3.1.1.-
Bar
), two overlapping bars will appear, one in green which indicates the video carrier level
(channel tuning) or the tuned frequency level (frequency tuning), and the other in red which
indicates the measured noise level.
Figura 64.-
Indication of C/N via bars
This function has the following submenu:
Tuned
frequency
Channel bandwidth
C/N measurement
Tuned channel
Channel bandwidth
C/N measurement
Selected channel plan
Multimetter FSM 500
Ref. 5903
59