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Related Manuals for Grundig GSS HDMT 473 MX
Summary of Contents for Grundig GSS HDMT 473 MX
- Page 1 Grundig SAT Syst ms Head-End Digital Modulator Terrestrial HDMT 473 MX HDMT 474 MX HDMT 475 MX C LASS CLASS Phone: +49 (0) 911 / 703 8877 Grundig SAT Systems GmbH Fax: +49 (0) 911 / 703 9210 Beuthener Straße 43 Email: info@gss.tv...
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Page 2: Table Of Contents
Contents 1 Safety regulations ....................3 2 General information .................... 3 2.1 Packing contents ..................3 2.2 Technical data ..................4 2.3 Description ................... 5 2.3.1 Software versions ................ 6 2.3.2 How the TP module works ............6 2.3.3 Explanation of the term “symbol rate” ..........7 2.3.4 Bandwidth-efficient assignment of cable channels with low bandwidths (SelecPlex ®... -
Page 3: Safety Regulations
Safety regulations Important • Assembly, installation and servicing must be carried out by an authorised electrician. • Switch off operating voltage before the start of assembly or service work or pull out the mains plug. • Install the system … in a dust-free, dry environment so that it is protected from moisture, vapours, splashing water and damp somewhere protected from direct sunlight... -
Page 4: Technical Data
2.2 Technical data The devices meet the following EU directives: 73/23/EEC, 89/336/EEC The product fulfils the guidelines and standards for CE labelling. HF input: Frequency range: 177.5 … 226.5 MHz, 474 … 858 MHz Frequency raster: CCIR Level range: 30 dBµV … 80 dBµV (16 QAM , GI= , 8k) HF output:... -
Page 5: Description
2.3 Description The Cassettes convert two COFDM modulated signals into one QAM-modulated data flow. The Cassettes are controlled via the head end. Each Cassette has two terrestrial inputs and one HF output. Each Cassette is equipped with two channel strips (“A” and “B”). The channel strips consist of the digital terrestrial tuners, the digital signal preparing units and the output QAM converter. -
Page 6: Software Versions
2.3.1 Software versions Cassette The inquiry of the Cassettes´ software versions is described in chapter 5. Control unit If necessary, you can call up the display of the software version of the control unit manually: • Hold down any two keys of the control unit simultaneously until the display goes dark and the software version, e.g. -
Page 7: Explanation Of The Term "Symbol Rate
2.3.3 Explanation of the term “symbol rate” Modulation schemes such as QPSK and QAM transmit multiple bits simultane- ously. These are referred to as symbols. In addition to the user data flow which transmits video and audio information, error correction bits are transferred. The FEC number states the ratio of error correction bits to user bits. -
Page 8: Bandwidth-Efficient Assignment Of Cable Channels With Low
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). -
Page 9: Assembly
Assembly 3.1 Installing the Cassette arning Before inserting or changing Cassettes, pull the mains plug of the head end out of the mains socket. • Unscrew the fastening screws from the bracket in the head end. • Insert the Cassette into a free slot and push it into the housing. •... -
Page 10: The Operator Control Panel At A Glance
Note: The operating software of the Cassette can be updated via the socket “RS 232 UPDATE” (9-Pin-Sub-D) by means of a PC or notebook. Use the “BE-Flash” software as the update software. You can find the current operating software of the Cassettes on the website “www.gss.tv”. The operator control panel at a glance 4.1 Menu items Program the Cassette using the keys on the head end control unit. -
Page 11: Programming
Programming The following examples show how the HDMT 474 MX Cassette is programmed; the output channels can be set from S21 … S41. Set the other Cassettes listed in the same way. 5.1 Preparation Notes: – Using the menu “LEVEL CONTROL” the Cassette generates an equally power- ful HF carrier on the video carrier frequency of the channel. -
Page 12: The Menus At A Glance
5.2 The menus at a glance BE–Remote V 35 Ein/On Please wait … t > 10 s Bx 1A TWIN-SAT Böx 4 TWIN-SAT Box 1 COFDM-MUX Box 2 QPSK-DSL C5-12,S3-24 C5-12,S3-24 S21-S41 M** S21 S21-S41 Bx 1A OUTPUT: Bx 1A OUTPUT: ▶... - Page 13 INPUT: Bx 1A INPUT: Bx 1A ▶ – (578.0) -64 … +64 ◀ Bx 1A INPUT: Priority: high INPUT: Bx 1B INPUT: Bx 1A ▶ – (626.0) -64 … +64 ◀ Bx 1B INPUT: Priority: high Bx 1A TV + 01/18 ◀...
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Page 14: Cassette Programming
5.3 Cassette programming • Switch on the head end. —> The display shows the software version of the head end (e.g. V 35). —> The processor reads the Cassettes‘ data (approx. 10 seconds). BE–Remote BE–Remote V 35 V 35 Ein/On Ein/On Please wait …... - Page 15 Setting the frequency offset (fine tuning) • If necessary press the button until “0” also appears in ▶ the display. • Use the keys to set the offset (-64 … +64). • Use the key to return to the channel setting. ◀...
- Page 16 S 21 306.00 S 35 418.00 C 28 530.00 C 42 642.00 C 56 754.00 S 22 314.00 S 36 426.00 C 29 538.00 C 43 650.00 C 57 762.00 S 23 322.00 S 37 434.00 C 30 546.00 C 44 658.00 C 58 770.00...
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Page 17: Querying Software Versions
Querying software versions Bx 1A Bx 1A VERSION: VERSION: MUX 7 MUX 7 MTP15 MTP15 —> The software versions of the Cassette (e.g. MUX 7) and the TP module (e.g. MTP15) are indicated. • Press the button. —> The menu “Modulator settings” – “OUTPUT: Modulator”... -
Page 18: Setting Output Level Of The Channel Strips
Setting output level of the channel strips This setting is not urgently necessary with these Cassettes. Bx 1A Bx 1A OUTPUT: OUTPUT: 0 … -7 0 … -7 LEVEL LEVEL HF OUT: HF OUT: Bx 1A Bx 1A OUTPUT: OUTPUT: LEVEL CONTROL LEVEL CONTROL •... -
Page 19: Producing A Qam Signal For Testing
Producing a QAM signal for testing The Cassette generates a QAM signal for testing, without there having to be an input signal. In the second menu line, the corresponding output symbol rate e.g. “6900 kBd” (= 6,900 kilosymbols per second) is shown. OUTPUT: OUTPUT: Bx 1A... -
Page 20: Qam Monitoring
QAM monitoring In this menu the signal at the Cassettes´ output is defined if there is no input signal available. Thus an automatic moni- toring of the QAM modulated output signal is possible. – “Ueberwachung” (monitoring): For monitoring with the Monitoring Cassette a single carrier is output. -
Page 21: Setting The Hierarchical Modulation "A
• Use to set the desired input channel. • If necessary use the button to activate the menu “Fine ▶ tuning” (“0” is displayed additionally). • Use for fine tuning. —> Return to the main menu: Press the button. ◀ •... -
Page 22: Setting The Input Channel "B
Setting the input channel “B” INPUT: INPUT: Bx 1B Bx 1B INPUT: INPUT: Bx 1A Bx 1A ▶ ▶ – – (626.0) (626.0) -64 … +64 -64 … +64 ◀ ◀ • Use to set the desired input channel. • If necessary use the button to activate the menu “Fine ▶... - Page 23 – Every station that is added via channel strip “A” or “B” increases the output symbol rate. If you add too many sta- tions to the new data stream, the symbol rate will exceed 100 %. This can cause interference to the stations added. –...
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Page 24: Setting The Station Filter / Channel Strip "B
Setting the station filter / channel strip “B” All channels of channel strip “B” are scanned and dis- played with name and channel type. The meaning of what is displayed is equivalent to the description for channel strip “A”. Bx 1B Bx 1B TV + 01/08 TV + 01/08... -
Page 25: Scanning The Station Filter
Scanning the station filter Note: – If stations are switched on or off in the station filters, the data of the station filters are scanned automatically. The display shows “read …“. As soon as scanning has finished the menu “Setting the QAM mode”... -
Page 26: Setting The Qam Modulation
Setting the QAM modulation AUDIO AUDIO Bx 1A Bx 1A QAM-MODE: QAM-MODE: – – 64-QAM 64-QAM • Set the QAM mode with —> A higher QAM mode restricts the output symbol rate (permissible value < 7,000 kilosymbols per second). An output QAM mode of > 64 QAM places a large burden on the cable network. - Page 27 • Use the buttons to place the cursor under the digit ◀ ▶ to be changed (“number 1”) and set the symbol rate with the buttons The value set corresponds to the new output symbol rate. Note: – Increase the value of “number 1” —>...
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Page 28: Network Information Table (Nit)
Network Information Table (NIT) Bx 1A Bx 1A NIT: NIT: on / off on / off – – => => Make Make ▶ ▶ • To switch NIT “on” or ”off”: Press the button. • Activate “Make” by pressing ▶ —>... -
Page 29: Saving Settings
In this case, you must create a NIT (“Make”). The NITs of all the QAM Cassettes in the head end are thus automatically updated. Saving settings • Press the button. —> Return to “Selecting the Cassette” (page 14). —> The “new” settings are saved permanently. —>... - Page 30 Service: Phone: +49 (0) 911 / 703 2221 Fax: +49 (0) 911 / 703 2326 Email: service@gss.tv Alterations reserved. Technical data E. & O.E. © by GSS GmbH 03082006...