Selecting The Measurements - Promax TV EXPLORER HD ATSC Manual De Instrucciones

USER'S MANUAL. TV EXPLORER
6) LNB Low Osc.
Sets the LNB low band local oscillator.
7) LNB High Osc.
Sets the LNB high band local oscillator.
5.14

Selecting the Measurements

The types of measurements available depend on the operating band (terrestrial or
satellite) and the type of signals (analogue or digital).
Terrestrial band - Analogue channels:
Level
Video / Audio
C/N
FM Deviation
Terrestrial band - Digital channels (DVB-C and ITU-T J.83/B):
Channel power
C/N
MER
CBER
Terrestrial band (ATSC)
Channel power
12/2010
HD ATSC
Level measurement of the currently tuned carrier.
Video carrier to audio carrier ratio.
Ratio between the modulated signal power and the equivalent
noise power for a same bandwidth. (according to TV standard)
Measure the frequency peak deviation for any modulated
analogue carrier in FM.
Channel power is measured assuming that power spectral
density is uniform throughout channel bandwidth.
To measure it correctly it is indispensable to define the
Channel BW.
Out-channel measurement. Noise level is measured at f noise =
f tuning ± ½*Channel BW. To measure it correctly digital channel
must be tuned at its central frequency.
Modulation error ratio measurement.
BER measurement (Bit error rate) for the digital signal before
error correction (BER before FEC).
Channel power is measured assuming that power spectral
density is uniform throughout channel bandwidth.
To measure it correctly it is indispensable to define the
Channel BW.
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