Digital Tv: Measuring The Power Of Digital Channels - Promax PRODIG-3 Manual Del Usaurio

USER'S MANUAL. PRODIG-3
In order to modify this frequency, press the measurement configuration
[17] key, to accede to the CONFIGURATION menu. By turning the rotary selector
[1], locate the NOISE cursor on the position of the marker using
option (see section "5.15.1 Markers") or directly enter the value of the new
MARKER
noise frequency by means of
70
60
50
40
30
CH:43
When measuring channels in the satellite band or digital channels, to measure
the C/N ratio correctly, the bandwidth of the channel must be defined previously, using
the Channel BW option on the Measurements Configuration menu that appears
when pressing [17] key.
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.

5.14.4 Digital TV: Measuring the Power of Digital Channels

The PRODIG-3 measures digital channel power in the measurement filter
bandwidth and estimates total channel power assuming that spectral density is uniform
throughout channel bandwidth.
03/2008
option.
NOISE FREQ
FREQ:
Figure 22.- NOISE cursor. C/N (MANUAL).
NOISE FREQ. TO
650.00 MHz
C/N REF: 16.5 dB
SPAN : 32 MHz
IMPORTANT REMARK
Page 43