A07A2200S
compared to the one equivalent to a sine signal which deviates 19KHz; the result of the comparison
is expressed in dB and it must not be higher than 0, in order to make the measurement complying
with the rule. This limit is debatable and, as it has been described in chapter 7, normally in on-field
measurements the values of 2,3dB are found which, after all, we estimate don’t cause over
modulations.
Since the peak modulation values are random (they depend, besides on the set levels, on the type of
musical pieces as well), K or PM values can remarkably vary during the day relating to the type of
the transmitted program; it’s useful to do many measurements at different times by trying to
measure dance-music rather than spoken. By using the Personal-Computer interfaced with COM1
placed on the front panel it’s possible to perform this measurement with many hours of observation
periods as it will further be seen.
4.6.16 By entering PAGE UP the following screen shot is accessed:
Here the transmitter internal clock which is used for the memorisation of all the events can be set.
At the top the current date appears, the new date at the bottom; in left to right order month, day,
year, hours, minutes, seconds appear.
P 17 ------------TEMPORAL POWER REDUCTION---------------------
START TIME = 23:00 STOP TIME = 06:00
POWER = 1000 W POWER REDUCTION = NO
PRESS PAGE UP/DOWN TO CONTINUE >
380 221 R02 Pag. 26
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