Cable TV Measurements (Option K20) R&S FSL
1300.2519.12 2.92 E-11
8. To enter the remaining channels proceed as in step 7
Channel 22: RF = 486 MHz
Channel 23: RF = 494 MHz
Channel 24: RF = 502 MHz
9
. To save your work, press the Save Changes softkey.
Having finished the first step, you have build a channel table as shown in Fig. 2-65. Please note,
that it is not possible yet, to do any measurements, as all channels are marked as < unused >.
Nevertheless, you can use the EXAMPLE BAVARIA channel table as a base model for all channel
tables required all over Bavaria.
Fig. 2-65 Channel table "EXAMPLE BAVARIA'' with entered frequency plan
Create modulation standards
For detailed information on channel tables refer to section Channel tables, for modulation standards
refer to section Modulation standards. A worked out example can be found in Example: Creating a
channel table.
The second and third steps require knowledge about a particular network. Thus, information about the
programs (see Channel tables) and the possible services (see Modulation standards) has to be
collected. For our example, we retrieved this information from the operator of the small cable TV
network of Wipfing, a village in Bavaria. We found out, that there is a traditional TV chain, broadcasting
their TV program using analog transmission techniques with stereo sound. The technical details are
summarized in Table 2–13. Besides, another TV chain, equipped with state–of–the–art Bavarian
broadcast technology, feeds two digital DVB–C programs into Wipfing's cable TV network. The
parameters are listed in Table 2–14.
Table 2–13: Analog TV service data for PAL_BG_STEREO modulation standard
Video PAL B/G
Sound Stereo: FM 5.5 MHz / FM 5.7421875 MHz
Group delay profile general
VITS: Bar line CCIR17, line 17
VITS: Quiet line line 22
Sideband position normal
To Next Page
Loading...
