7849B
– 7859B – 7817B
p.
50
11.3 Autolock function
This function is design to lock on a digital signal (terrestrial, cable or satellite)
You just have to enter the frequency or the channel (for terrestrial), then press AutoLock, The instrument will
find automatically in few seconds the digital standard, the modulation type and all other parameters of the
signal.
Example for terrestrial, channel 38 (frequency 610MHz):
11.4 Level measurements
You can measure levels at a specific frequency with a detection matching the standard.
In terrestrial band, for an user socket, the level should be:
-
between 50 and 66 dBµV under FM
-
between 35 and 70 dBµV under DVB-T/H, DVB-T2
-
between 57 and 74 dBµV in any other case
In satellite band, for an user socket, the level should be:
-
between 47 and 77 dBµV.
Example in terrestrial mode:
Signal/noise ratio of
the signal
Signal level
Reduced spectrum of the
Span signal, ca. 10MHz
