Promax TV EXPLORER II Manual De Instrucciones página 149

USER'S MANUAL. TV EXPLORER II/II+
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 [17] to show on screen the CONFIGURATION menu of the
measure. The PILOTS function allows you to set pilot signals manually. To do this, using
the rotary selector [1] select that function and change it to MANUAL. You will 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 back PILOTS function to AUTO.
2.- MEASUREMENT OF THREE PILOTS THROUGHOUT THE NETWORK
Once TV EXPLORER II / II+ has been calibrated, start to make level
measurements in the different distribution outlets using the EXPLORER. On the
screen will appear the attenuation values for the three pilot frequencies measured in the
outlet plate (see the following figure).
10
0
-10
-20
FREQ:
REF:
TEST:
ATT:
Figure 17.- Attenuation measurements in an outlet plate.
In order to finish measuring, press the rotary selector [1] and select the (EXIT)
option.
12/2013
1042.25 1703.25 2108.25
84.7 90.2 100.3
80.7 84.2 77.6
4.0 6.0 22.7
CALIBRATE
MHz
dBuV
dBuV
dB
EXIT
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