4. Atten:
Attenuation. Manuel attenuation 15dB on/off.
Selected position is displayed in the LCD-display.
0. 13/18V
Selection of 13V alt. 18V. Chosen position is displayed at the
top of the LCD-display.
#. 22kHz
22 kHz on/off. Chosen position is displayed at the top of the
LCD-display.
3.2. Digital mode
SATLOOK Digtal NIT can easily and very accurate measure at digital transponders
(MPEG-streams). This kind of measuring is very good to do when an installation is
done, to control and verify that the installation is correct performed (fingerprint of
the installation). It is less accurate when trying to find a satellite and adjusting the
cross-polarisation.
Therefore, start with finding the ”right” satellite with the spectrum-function. Check
and adjust the cross-polarisation with the “Max zoom in” function.
* Test the maximum with the
X-pol function
(button nr 4 in the main menu). The
instrument will measure the strength of the selected peak and then automatically
"jump" to the other polarisation and measure there as well (same frequency and
settings). The difference (for ex. -7dB) is presented on the right hand side of the
display.
Chose a suitable transponder (put the cursor on top of a ”peak”) and select function 2
in the Main menu (Digital).
•
The monitor displays, in the left upper corner, the so called,
constellationsdiagramme (QPSK).
•
To the right of it, four ”lock-parameters” and a time counter (that shows the
“lock-time” on a bit-stream”) are shown.
These "lock parameters" should be turned On (become white) and the clock
should start counting as soon as a Digital transponder is found.
If not, or if the signal "comes and goes" then the signal is very poor and/or
weak.
Try to adjust the dish better and/or check the setting of the LNB to improve
the signal.
•
The other measured data like the S/N-ratio (signal/noise ratio) och BER (bit
error rate) are displayed just under the constellationdiagramme in the shape
of Bar-graph´s (thermometer-scales). The higher level, the better signal!
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