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Chapter 6 - TV Measuring Range
10713 Vxx.11
The scan is then started by first tuning the measuring receiver to a channel at which the scan
should begin. Press the
↑
key to start the scan in the positive direction. Press the
↓
key to do the
same in the negative direction. When the band limit is reached, the scan continues at the other end
of the range. You can end the scan at any time by pressing
↑/↓
or
ENTER
. “SCAN” is shown on the
display while the scan takes place.
DTMB parameters
6.2.2.5.2
As soon as the receiver has completed the synchronization process, several parameters are shown
on the display. When LOCK appears, it means that the digital receiver is receiving a valid data
stream.
In contrast,
UNLK
means that either the quality of the signal that is present is insufficient, or that
the parameters of the receiver do not match, or that no DTMB signal can be received at this
frequency.
Figure 6-23 DTMB parameters
Once the receiver is synchronized, additional parameters are shown on the display. The DTMB
receiver determines these automatically.
In the figure shown above, the instrument receives a DTMB-Signal with the following parameters:
Multi carrier modulation: MULTICAR (C3780)
Multi carrier modulation
(MULTICAR – C3780)
Modulation scheme
64QAM
Guard-Interval(GI)
PN420 variable (equivalent 125 µs)
FEC
0.6
Time interleaver
M_720
