Verification Of Distribution Networks - Promax TV Explorer HD Manual De Usuario

5.11

Verification of distribution networks

(SAT IF Test / Attenuation Test)
This application allows to verify easily the TCI features (Telecommunications
Common Infrastructures) before the antennas and head-end devices are operative. The
procedure allows to evaluate the frequency response of a whole TV signals distribution
network by means of two steps:
NOTE: For this application the use of PROMAX RP-050, RP-080, RP-110 or RP-
250 signal generators are required, for which they have been specially
designed. If you use a generator that emits not modulated carriers, this may
cause a slight uncalibration during the SAT IF TEST.
1.- CALIBRATION
Connect the generator directly to the TV EXPLORER
adapter.
Power the signal generators of the RP PROMAX family through the TV
EXPLORER HD / HD
(see section '5.7 External Units Power Supply') press the
selector [1] to set a voltage of 13 V.
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
(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.
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or an external power supply. To set the External supply function
LE
[17] key to see on screen the measurement CONFIGURATION. By
USER'S MANUAL. TV EXPLORER HD / HD
HD / HD
[11] key, and the rotary
[6] key, select the Calibrate function
LE
using the BNC-F
LE
[22] menu for SAT
05/2011