USER’S MANUAL.
TV EXPLORER
HD
ISDB-T/T
B
11/2010
Page
55
En
g
lis
h
IMPORTANT REMARK
In order to measure digital channel C/N ratio it is indispensable to tune channel at
its central frequency.
In the case of the presence of adjacent digital channels, these could mask the noise
level measurement.
5.14.6 Digital TV: Measuring the Power of Digital Channels
The
TV EXPLORER
HD
ISDB-T/T
B
measures digital channel power in the
measurement 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:
Figure 29.-
Digital channel power measurement.
In addition to the power of the digital channel (67.0 dB
µ
V 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 and the deviation
frequency of the central tuning calculated by the demodulator, measurement that
indicates the adjustment in the channel tuning.
For the power measurement of a digital channel to be correct 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.
Содержание Promax TV EXPLORER HD ISDB-Tb
Страница 1: ...TV EXPLORER HD ISDB T TB EXPLORADOR UNIVERSAL DE TV UNIVERSAL TV EXPLORER 0 MI1777...
Страница 2: ......
Страница 4: ......
Страница 5: ...SUMARIO CONTENTS Manual espa ol English manual English...
Страница 6: ......
Страница 26: ...MANUAL DE INSTRUCCIONES TV EXPLORER HD ISDB T TB P gina 18 11 2010...
Страница 102: ...MANUAL DE INSTRUCCIONES TV EXPLORER HD ISDB T TB P gina 94 11 2010...
Страница 108: ......
Страница 128: ...USER S MANUAL TV EXPLORER HD ISDB T TB Page 18 11 2010...
Страница 206: ......