Digital Tv: Measuring The Power Of Digital Channels; Digital Tv: Measuring Ber - Promax US TV EXPLORER II Manual De Uso

USER'S MANUAL. US TV EXPLORER
NOTE
That measure is limited by the 6 MHz bandwidth on equipment's measure path. For
signals with higher bandwidth, the measured values will be inaccurate and worst
than real figures

5.14.6 Digital TV: Measuring the Power of Digital Channels

The US TV EXPLORER
filter bandwidth and estimates total channel power assuming that spectral density is
uniform throughout channel bandwidth.
On selecting the CHANNEL POWER measurement mode, the screen displays
the following information:
10
FREQ:
CH:
MPEG-2
In addition to the power of the digital channel (55.8 dBμV in previous figure) this
also shows the tuning frequency or channel, depending on the tuning mode selected,
and the offset frequency to calculate the digital channel power.
In order that the power measurement of a DVB-S/S2 digital channel will be good it
is essential to have previously defined the channel bandwidth using the Channel BW
option, in the Measurements Configuration menu that appears when pressing
[17] key.

5.14.7 Digital TV: Measuring BER

The US TV EXPLORER
digital signals depending on the type of used modulation.
11/2013
II
II measures digital channel power in the measurement
30 50 70
57.00 MHz
-3 kHz
A02
Figure 30.- Digital channel power measurement.
II offers three ways to measure the bit error rate (BER) of
90 110 130
C/N: >21.3 dB
» POWER: 55.8 dBµV
MER: 19.5 dB
SER: 1.0E-5
VBER: 1.0E-8
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