Promax US TV EXPLORER II Manual De Uso página 46

Finally, select the SAT IF TEST application on UTILITIES
band, or the ATTENUATION TEST for terrestrial band, connect the generator to the
point where the antenna will be connected (signal source).
Press the
means of the Threshold Attenuation option is possible to adjust the maximum difference
between the pilots reference level from 5 to 50 dBmV.
Later, by means of the horizontal cursors
function (see the following figure). Wait for some seconds until the calibration process
for three pilots is completed: MEASURING REF. is indicated on screen while this
process is in progress.
10
0
-10
-20
FREC:
REF:
TEST:
ATT:
The calibration process must be carried out over the point of the installation which
is taken as reference, i.e. usually the headend. During this process is determined the
number of pilot frequencies to check, from one to three, in addition to the reference level
for pilots. In order to determine the number of pilots, the equipment takes the higher
found level and verifies that the other pilots have a non lower level to the reference one
plus the defined threshold level. If the pilot agrees this condition it will show on screen.
The user can also define the pilot frequencies:
Press the key
measure. The PILOTS function allows you to set pilot signals manually. To do this,
using the rotary selector
see a menu where you can set the frequency of each of the 3 pilot signals. If you want
to return to the automatic generation of pilot signals, change PILOTS function back to
AUTO.
Page 38
[17] key to see on screen the measurement CONFIGURATION. By
1294.89 1403.94
84.7
84.5
0.2
Figure 16.- SAT IF Test. Satellite band.
[17] to show on screen the CONFIGURATION menu of the
[1] select that function and change it to MANUAL. You will
USER'S MANUAL. US TV EXPLORER
[6] key, select the Calibrate
2130.99
90.2 100.3
90.2 99.1
0.0 1.2
CALIBRATE EXIT
[22] menu for SAT
MHz
dBµV
dBµV
dB
11/2013
II