• Use
▶
◀
/
to position the cursor under the digit of the
frequency displayed to be set.
• Press
to set the input frequency.
• Set the frequency offset shown in the display to less than
1 MHz by varying the input frequency using the
buttons.
• Press the
button.
—> The “Testing the signal to noise ratio” – “
C/N
” menu
is
activated.
Testing the signal to noise ratio
In this menu you can estimate the quality of the input signal.
Bx 4A
12.0 dB
C/N
(+ 9.6) OK
1
Current signal to noise ratio
2
This value shows the difference between the quality
of the input signal and the threshold of the tuner at
this type of modulation.
At a value lower than “
5
” picture dropouts can oc-
cur.
3
If
“
OK
” is shown, the signal to noise ratio is ok.
If a value < 5 is shown under
2
the display changes
from “
OK
” to “
??
”. In this case test the input signal.
—> In addition to the indicator in the display, there is
also a status LED which indicates the quality of the
received transport stream:
Bx 4A
11836 -1.8
FREQ
CN 12
▶
◀
/
Bx 4A
12.0 dB
C/N
(+ 9.6) OK
Anzeige: Signalqualität
Display: Signal quality
Bx 4A
11836
-1.8
FREQ
CN 12
▶
◀
/
