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2.3.4 Bandwidth-efficient assignment of cable channels with low bandwidths

(SelecPlex

)

Channels with low bandwidths are the result of filtering out stations which are
not required. These “narrow” channels can then be arranged in one channel to
save space. To do this, activate fine tuning in the “

Output channel

” menu (as-

signment outside the official channel raster).

Note:

The required bandwidth is roughly equal to the symbol rate plus 20% in MHz.

ESC 1

Nile TV

Nile News

TVP 1
TVP 2
TVP 3

Viva

Gala

3 MHz

64 QAM

2.5 Ms/s

4 MHz

64 QAM

3.3 Ms/s

S21

S22

S23

S24

TV 5

M 1

ESC 1

RAI UNO

DW TV

SISAL

TV Bulgaria

Mediolanum

Nile TV

Nile News

Super Sport

Gala

Fantasy

Cine 5

TVP

TV Polonia

TVP

Astra 19,2° East

Eutelsat 7° East

Türksat 42° East

Eutelsat 13° East

Содержание GSS HDMT 473 MX

Страница 1: ...er Stra e 43 D 90471 Nuremberg Phone 49 0 911 703 8877 Fax 49 0 911 703 9210 Email info gss tv Internet http www gss tv Grundig SAT SystEms Assembly Instructions Assembly Instructions English HDMT 473...

Страница 2: ...11 5 1 Preparation 11 5 2 The menus at a glance 12 5 3 Cassette programming 14 Selecting the Cassette 14 Setting the output channel 14 Querying software versions 17 Modulator settings 17 Setting outpu...

Страница 3: ...re the device is adequately ventilated Do not cover the ventilation slots Beware of short circuits No liability is accepted for damage caused by faulty connection or inexpert handling Observe the rele...

Страница 4: ...dB V 16 QAM 2 3 GI 1 4 8k HF output HDMT 473 MX Frequency range 112 MHz 306 MHz HDMT 474 MX Channels S21 S41 Frequency range 306 MHz 466 MHz Channel raster 8 MHz HDMT 475 MX Channels C21 C69 Frequency...

Страница 5: ...lows to create a new data flow out of the stations selected individually from the two data flows The prepared input signals are transmitted to the HF output collector of the head end via the HF output...

Страница 6: ...nd service information which can be changed using the TP module The individual functions Station filter Individual stations can be deleted This reduces the data rate and consequently a lower output sy...

Страница 7: ...AM SR A FEC x 2 5 x SR E 16 QAM SR A FEC x 1 2 x SR E 4 QAM SR A FEC x 1 1 x SR E Example Output symbol rate SR A 64 QAM FEC 3 4 Input symbol rate SR E 27 500 kilosymbols per second SR A 3 4 x 1 3 x 2...

Страница 8: ...ng in the Output channel menu as signment outside the official channel raster Note The required bandwidth is roughly equal to the symbol rate plus 20 in MHz ESC 1 Nile TV Nile News TVP 1 TVP 2 TVP 3 V...

Страница 9: ...y make it contact with the connections of the circuit board and the HF bus bar Fasten the Cassette with the 1 screws 3 2 Connecting the Cassette Connect the HF input cable with the input sockets INPUT...

Страница 10: ...unit then shows the menus You can select the following main menu items with the button Cassette Output channel Input channel Bx A Bx B Hierarchical modulation Bx A Bx B Station filter Bx A Bx B QAM m...

Страница 11: ...arrier frequency of the channel In this way the Cassette s level can also be set with an analogue TV test receiver set to the video carrier frequency of the channel In order to prevent interference wi...

Страница 12: ...EL CONTROL OUTPUT Bx 1A Modulator OUTPUT on on off berwachung KDG Monitoring KDG Bx 1A MODE Ueberwachung 64 64 Bx 1A MUX 7 MTP15 VERSION Bx 1A S21 OUTPUT 306 00 Bx 1A C5 12 S3 24 TWIN SAT C07 B x 4 C5...

Страница 13: ...PUT OK Bx 1B Priority INPUT high Bx 1A C40 0 INPUT OK Bx 1A C34 0 INPUT OK 64 64 64 64 Bx 1A read FILTER Bx 1B read FILTER Bx 1A SR 6875 5800 STUFFING Bx 1B Filter read FILTER Bx 1A off NIT Make M Bx...

Страница 14: ...ng the output channel By pressing set the desired output channel The channel range that can be set depends on the type of Cassette used Bx 1A C5 12 S3 24 TWIN SAT C07 B x 4 C5 12 S3 24 TWIN SAT C07 Bo...

Страница 15: ...el centre fre quency of the existing channel raster in the range of chan nels S21 C69 frequency raster 8 MHz The frequency raster is 7 MHz in the range of the lower channel ranges channels S2 S20 If o...

Страница 16: ...00 C 38 610 00 C 39 618 00 C 40 626 00 C 41 634 00 Channel Channel centre frequency MHz C 42 642 00 C 43 650 00 C 44 658 00 C 45 666 00 C 46 674 00 C 47 682 00 C 48 690 00 C 49 698 00 C 50 706 00 C 51...

Страница 17: ...ettings If you do not need the output channel of this modulator you can switch it off By pressing the buttons switch the modulator HF output on default setting if necessary or switch it off Press the...

Страница 18: ...can measure the absolute output level using an analogue test receiver Measure the output level of the channel strip using the con nected antenna test receiver Press the AUDIO button to activate the m...

Страница 19: ...e menu Inverting the user signal OUTPUT Spectrum is activated Inverting the user signal For exceptions and older digital cable receivers the spec tral position of the user signal can be inverted inver...

Страница 20: ...INPUT is activated Setting the input channel A Notes If three dots appear in the second line of the display the Cassette is in the station search mode Please wait until the process has finished Once...

Страница 21: ...l modulation is used In this process several data streams are modulated onto a DVB T data stream using Quadrature Amplitude Mod ulation QAM The robust High Priority data stream HP with a lower data ra...

Страница 22: ...pressing set to high or low not relevant in the case of standard modulation Press the button The menu Setting the station filter A e g Bx 1A TV 01 18 is activated Setting the station filter channel st...

Страница 23: ...rip A TV TV channel type The channel that has just been selected is activated 01 18 The 1st of 18 channels scanned is displayed Das Erste Channel name Other possible indicators RA Radio channel type T...

Страница 24: ...meaning of what is displayed is equivalent to the description for channel strip A Select channel strip B channels one after the other with and press to switch on activate the channel wished press to s...

Страница 25: ...button The menu Setting the QAM mode QAM MODE is activated page 26 To scan the data of the station filters manually press the button The station filters of the channel strips A and B are scanned As so...

Страница 26: ...ss the button The menu Setting the stuffing STUFFING is activated Setting the stuffing SR 6875 number 1 Active output symbol rate Bx 1A SR 6875 5800 STUFFING Number 1 Number 2 5800 number 2 The curren...

Страница 27: ...y value up to 7 000 Reduce the value of number 1 With the station filter switched on the number 1 can be decreased To do this observe the number 2 for 30 seconds and note the highest value Add rough l...

Страница 28: ...ll QAM Cas settes in the NIT menu changes to on To deactivate the new NIT Press the button The original NIT is restored Notes The cable NITs of the other Cassettes remain acti vated When it is reactiv...

Страница 29: ...he Cassette A page 14 The new settings are saved permanently If functions of the TP module are activated their sta tus is shown in the second line of the display M station filter on S Stuffing is acti...

Страница 30: ...Alterations reserved Technical data E O E by GSS GmbH 03082006 Service Phone 49 0 911 703 2221 Fax 49 0 911 703 2326 Email service gss tv...

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