Promax Promax TV EXPLORER HD ISDB-Tb, Manual

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USER’S MANUAL. TV EXPLORER HD ISDB-T/T
B
Page 38 11/2010
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 HD ISDB-T/T
B
using the
BNC-F adapter.
Power the signal generators of the RP PROMAX family through the
TV EXPLORER HD ISDB-T/T
B
or an external power supply. To set the External supply
function (see section '5.7 External Units Power Supply') press the [11] key, and the
rotary selector [1] to set a voltage of 13 V.
Finally, select the SAT IF TEST application on UTILITIES [22] menu for SAT
band, or the ATTENUATION TEST for terrestrial band, connect the generator to the
point where the antenna will be connected (signal source).
Press the [17] key to see on screen the measurement CONFIGURATION . By
means of the Threshold Attenuation option is possible to adjust the maximum difference
between the pilots reference level from 5 to 50 dB
µ
V.
Later, by means of the horizontal cursors [6] key, select the Calibrate 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.