Promax US TV EXPLORER II, User Manual

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USER’S MANUAL. US TV EXPLORER II
Page 54 01/2008
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FREQ:
C/N REF:
43 CH: SPAN: 32 MHz
650.00 MHz
16.5 dB
Figure 29 .- NOISE cursor. C/N (MANUAL).
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.
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 US TV EXPLORER II 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: