AP401FULL- HD_rev. 09_UK
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4.18.3.
LTE
The LTE function will analyze the best coexistence of digital terrestrial signals with the latest
LTE signals which, because of their frequency and power, without proper protection would
risk interfering with the last available MUX DVB-T.
This function will help to calibrate the LTE signal protection filters or to assess any
performance of those used.
To activate the LTE function, press and hold CH, select LTE and press ENTER.
The instrument will automatically set the SPAN values and more selective filters to analyze
the best of their coexistence.
The markers will then automatically be positioned on the frequencies of channel 60 and
channel 61, activating continuous calculation in real time, comparing the power of channel
61 to that of channel 60.
Δ
LTE communicates the resulting ratio between the two signals in real time:
•
Δ
LTE > 30 critical condition (filter not working properly or absent)
•
Δ
LTE just under 30 (filter working just enough)
•
Δ
LTE < 25 (filter working very well)
5.
DIGITAL MEASUREMENTS
QPSK/8PSK demodulator
for digital satellite signals DVB-S /DVBS2
OFDM demodulator
for terrestrial TV digital signals DVB-T
QAM demodulator
for cable TV digital signals DVB-C
MPEG4/MPEG2 decoder
to display and listen to free-to-air digital signals