Uhf And Vhf Wideband Matv Digital Amplifier Modules

Transcript

User Instructions - ‘1V’ UHF and VHF Wideband MATV Digital Amplifier Modules 1. Introduction The modular MATV amplifier range from Maxview has been designed and optimised specifically for use as high performance DTT (Digital Terrestrial Television) and analogue split band signal amplification in VHF/UHF MATV systems, or as the final high level head amplifier in a channelised MATV system. The VHF and UHF amplifiers provide the combination of very low noise figures, high output signal handling together with 20dB of gain control adjustment correctly located for DTT applications after the input stage. Because of their low noise figures and good signal handling characteristic all the amplifiers have excellent input and output dynamic range allowing them to be connected directly to the aerial or if the TV aerial is some distance away from the main headend distribution amplifier via a low gain, high output UHF Masthead Amplifier using the built in +12V d.c line power option. All the amplifiers are designed for indoor use and require a +12V d.c. power source from the associated PSU350 regulated power supply. System flexibility is assured and costs minimised as all the MATV amplifier modules and +12V regulated power supply PSU350 are available as separate replacement items. Some of the main user features of the MATV amplifier modules are shown in the comparison table below: Feature UHF Line Power Module MAA22UV Y MAA32U Y MAA38U Y MAA32UV Y MAA38UV Y MAA32V N UHF Input VHF Input Gain Control Monitor Point Built in O/P Diplexer Y Y Y Y Y Y Y N N Y Y Y N Y Y Y (UHF) Y (UHF) Y (VHF/FM) N Y Y N N N Y(VHF) N N Y (VHF) Y (VHF) Y (UHF) 2. Performance Specifications VHF/UHF Modules UHF Modules Model MAA32U MAA38U MAA22UV (5) UHF VHF 470-860 5-270 1X UHF 1X VHF 1 x Diplexed UHF/VHF N/A N/A 22dB 0dB Fixed N/A N/A N/A 3.0dB N/A >40dB >35dB Bandwidth (MHz) 470-860 470-860 Number of inputs 1X UHF 1X UHF Number of outputs 1 1 Monitor point -30dB -30dB Gain 32dB 38dB Gain slope 3dB 3dB Gain control range 20dB (1) 20dB (1) Noise figure 3.5dB 3.5dB Out of band filter reject >40dB >40dB Max O/P -46dB Cross Mod 2 Analogue TV Channels 120dBuV (2) N/A 123dBuV UHF (2) 120dBuV (2) 5 Analogue TV Channels 114dBuV (2) 114dBuV (2) N/A 117dBuV (2) OR Acc to DIN45004B 116dBuV (2) 116dBuV (2) N/A 119dBuV (2) Input RLR (75 ohm) 14dB 14dB 14dB 14dB Output RLR (75 ohm) 14dB 14dB 14dB 14dB RF connectors Type F Type F Type F Type F d.c connector RCA socket RCA socket RCA socket Power requirements (d.c) +12V d.c 150mA (3) +12V d.c 220mA (3) +12V d.c 100mA (3) Input Line Power +12V 50mA option +12V 50mA option +12V 50mA option RFI screening Fully Screened Fully Screened Fully Screened Earth bonding connection Screw Screw Screw Operating temperature range -10˚C to +50˚C -10˚C to +50˚C -10˚C to +50˚C Dimensions inc connectors 142 x 106 x 40mm 142 x 106 x 40mm 142 x 106 x 40mm VHF/FM Module MAA32UV (5) UHF VHF 470-860 5-270 1X UHF 1X VHF 1 x Diplexed UHF/VHF N/A N/A 32dB 0dB 3dB N/A 20dB (1) N/A 3.5dB N/A >40dB >35dB MAA38UV (5) UHF VHF 470-860 5-270 1X UHF 1X VHF 1 x Diplexed UHF/VHF N/A N/A 38dB 0dB 3dB N/A 20dB (1) N/A 3.5dB N/A >40dB >35dB MAA32V (4) UHF VHF 470-860 44-270 1X UHF 1X VHF 1 x Diplexed UHF/VHF N/A N/A 0dB 32dB N/A 0dB Flat N/A 20dB (1) N/A 3.5dB >25dB >40dB 120dBuV (2) N/A 114dBuV (2) N/A 116dBuV (2) N/A 14dB 14dB 14dB 14dB Type F Type F RCA socket +12V d.c 150mA (3) +12V 50mA option Fully Screened Screw -10˚C to +50˚C 142 x 106 x 40mm 123dBuV (2) N/A 117dBuV (2) N/A 119dBuV (2) N/A 14dB 14dB 14dB 14dB Type F Type F RCA socket +12V d.c 220mA (3) +12V 50mA option Fully Screened Screw -10˚C to +50˚C 142 x 106 x 40mm N/A 122dBuV (2) N/A 116dBuV (2) N/A 118dBuV (2) 14dB 14dB 14dB 14dB Type F Type F RCA socket +12V d.c 110mA (3) N/A N/A Fully Screened Screw -10˚C to +50˚C 142 x 106 x 40mm Notes: (1) Optimised for DTT and DAB signals with the gain control positioned after the first stage. (2) At the time of writing the de-rating rules for DTT signals are still under consideration by the DTG Reception Group. (3) Supplied from Maxview PSU350L Plugtop or PSU350M Desktop Regulated +12V d.c. Power Supplies. (4) MAA32V VHF/FM module has built in UHF O/P Diplexer and externally selectable FM or full VHF frequency band. (5) MAA22UV, MAA32UV and MAA38UV UHF modules have built in VHF O/P Diplexer covering 5-270MHz. Maxview reserve the right to alter their designs or specifications without prior notice. The figures quoted are typical and are subject to normal production tolerances. Page 1/8 9111141 Iss 6 User Instructions - ‘1V’ UHF and VHF Wideband MATV Digital Amplifier Modules 3. MATV System Installation Guidelines (i) DTT SYSTEMS - Before commencing any DTT/Analogue MATV installations or system planning we strongly recommend that the installer reads and is very familiar with the DTT reception information contained in the following DTG publications: a) R-Book 2: Installing Digital Terrestrial Television - Domestic Systems b) R-Book 3: Installing Digital Terrestrial Television - MATV Systems c) R-Book 4: Installing Digital Terrestrial Television - IRS (Integrated Reception) Systems. (ii) SOME HINTS AND TIPS ON DTT and ANALOGUE MATV SYSTEMS The importance of correct DTT system planning cannot be over emphasised, some useful tips are as follows: For systems the target figures for DTT and analogue levels and C/N can be found in R-Books 3 and 4 from the DTG. If you have not got sufficient signal level or C/N at the aerial output then the installation is not suitable for DTT reception. Either the size of UHF TV aerial and/or position of the aerial will need to be changed. N.B: Remember that the C/N directly off the aerial can never be improved by adding an amplifier after the aerial. Then plan the amplifier gains, signal handling and system losses (cable downleads, taps etc.) to achieve the target DTT signal levels and C/N at each Outlet plate in the system. One of the best and most cost effective ways to achieve the target levels and C/N at the Outlet plate is to use wideband UHF MATV amplifiers. It is advisable to plan so as to: a) Reduce the passive system loss either by using lower loss cable or multiple trunk cables with separate amplifiers b) Use lower gain MATV amplifiers with low NF that provide BOTH excellent INPUT and OUTPUT signal handling. The Maxview 22dB, 32dB and 38dB MATV amplifier modules are ideally suited for these type of systems as their input signal handling has been optimised to cope with a wide range of DTT Mux signal levels. Do not forget to keep the analogue levels between 60 and 80dBuV at the outlet plate. At some outlet plates it may be necessary to fit an in-line attenuator to prevent overload if the analogue TV levels are above 80dBuV. If the TV aerial is some distance away from the main head-end distribution amplifier then cable losses between the aerial and MATV amplifier will degrade the system C/N. In such situations we recommend the use a low gain UHF Masthead Amplifier with high signal handling capabilities such as the 13dB Masthead MHA13U/S with 2ch 114dBuV O/P level or 9dB MHA9U/S with 2ch 112dBuV O/P level. Reduce the cable and tap losses after the MATV Amplifier to get vastly improved Carrier to Noise (C/N) in DTT systems! Use good quality screened cable and equipment throughout the MATV installation Use Grouped equipment if ALL DTT and analogue channels are within the same UHF group De-rate amplifiers for more analogue channels using the 10 log (N-1) rule, e.g. for 5 channels de-rate output level by 6dB Use a meter specifically designed and calibrated for DTT when measuring DTT levels and C/N. Use a Low gain (<15dB), high signal handling Masthead to improve system C/N if losses between UHF aerial to Head-end are significant or if more system gain is required for larger MATV networks. Typical Coax cables loss in dB/100m at 800MHz for DS81 = 23dB CT/DS100 = 18dB CT125 = 15dB CT165 = 12dB Use broadband Taps or Splitters that operate up to 2.2GHz, for good quality taps typical Trunk Losses are: Nominal Tap Value: Frequency (MHz) 1 Way, Trunk Loss 2 Way, Trunk Loss 4 Way, Trunk Loss 10dB 12dB 15dB 20dB 25dB 860 2000 860 2000 860 2000 860 2000 860 2000 1.0dB 2.5dB ------- 1.0dB 2.0dB 1.0dB 2.0dB ------------- 2.0dB 2.5dB ------- 1.0dB 2.5dB 1.0dB 2.5dB ------- 3.5dB 4.5dB ------- 1.0dB 2.0dB 0.5dB 1.0dB MAXVIEW LTD . SETCHEY . KING’S LYNN . NORFOLK . PE33 0AT . ENGLAND CUSTOMER HELPLINE: 01553 811000 e-mail: [email protected] web site: www.maxview.ltd.uk Page 2/8 9111141 Iss 6 User Instructions - ‘1V’ UHF and VHF Wideband MATV Digital Amplifier Modules 4. MATV Equipment Installation Guidelines (i) AMPLIFIER MODULES The MAA22UV 22dB, MAA32UV 32dB and MAA38UV 38dB UHF modules and MAA32V 32dB VHF/FM module have integral output diplexers. The MAA22UV, MAA32UV and MAA38UV have a passive VHF input which is diplexed with the output of the 22dB, 32dB or 38dB UHF amplifier. The MAA32V has a passive UHF input which is diplexed with the output of the 32dB VHF/FM amplifier. Secure the amplifier module to a convenient flat surface using the screws as required within 2m of the associated PSU350 Power Unit allowing sufficient clearance to plug the d.c connector in and out and for air circulation around the amplifier module. When using multiple amplifier modules together in a block for multiple trunk feeds we recommend that they are spaced apart by at least 20cm. Connect the RF cables via a suitable earth bonding block preferably using crimped F connectors to the amplifier inputs and outputs. Cascade +12V line powering is provided as a manual link selectable option on the UHF aerial input of all the UHF modules to cater for either weak Off-air UHF TV signals and/or long cable runs between the TV aerial and the location of the MATV distribution equipment. For weak signal DTT applications or if more system gain is required perhaps because of equaliser losses ahead of the Head-end amplifier etc., then we recommend the use of a low gain, high signal handling, fully screened Masthead amplifier such as the Maxview UHF model MHA9U/S or MHA13U/S. For example if the MHA13U/S masthead is used with either of the 38dB UHF modules than a 50dB UHF MATV combination Masthead/Head end amplifier will be produced. (ii) EARTH BONDING PROVISIONS It is recommended that the amplifier chassis and RF connecting cables are safety earth bonded in accordance with BS EN 50083-1. The d.c resistance between the amplifier module earth bonding point and the nearest equi-potential bonding point shall be less than 5 ohms. A green/yellow earth bonding wire with minimum diameter 4mm2 is recommended. (iii) POWER SUPPLY MODULE The PSU350 Plugtop unit requires a convenient 230V mains socket. The PSU350L and PSU350M are fully safety approved for operation up to +50˚C ambient temperatures. Always ensure that there is sufficient ventilation around the Power Supply. It is normal for the Power Supply to run fairly warm to the touch and if two or more Plugtop PSU350L’s are used in a system they can be safely installed in single or dual switched mains sockets. The minimum recommended separation between Power Supplies is 50mm. N.B We do not recommend plugging the Power units side by side into multiway mains extension leads. First plug the PSU350L or PSU350M into the mains socket then plug the 2m d.c lead into the 12V d.c power socket of the MATV amplifier module. Ensure that all installation work is completed before switching on the power supply unit. (iv) PERMITTED POWER SUPPLY/AMPLIFIER MODULE COMBINATIONS The PSU350 Power Supplies are designed to supply +12V regulated d.c up to 350mA maximum current. A single PSU350 Power Supply Unit is thus capable of powering any of the following MATV Amplifier modules/Masthead combinations. 1. Any Maxview 22dB, 32dB or 38dB Amplifier module + UHF Masthead requiring 130mA or less at +12V 2. Any permutation of 2 x 22dB or 32dB UHF or VHF amplifier modules + UHF Masthead requiring 50mA or less at +12V. Using the 2 way phono splitter lead BP4063. (Separate PSU’s for each amplifier can also be used if so desired.) 3. 1 x 38dB amplifier module + 1 x MAA32V 32dB VHF/FM module + MHA13U/S 13dB UHF Masthead (25mA). Using the 2 way phono splitter lead BP4063. (Separate PSU’s for each amplifier can also be used if so desired.) N.B. One PSU350 is not capable of powering 2 x 38dB Amplifier modules, two separate Power Supplies must be used. The PSU350L and PSU350M are fully electrically and mechanically compatible with the Maxview LPI350 Line Power Injector Unit. These two units when used together produce a high current (350mA) fully screened masthead +12V Power Supply Unit. 9111141 Iss 6 Page 3/8 User Instructions - ‘1V’ UHF and VHF Wideband MATV Digital Amplifier Modules 5. Typical Wideband UHF MATV System Application Diagrams i) SINGLE trunk cable, WITHOUT MASTHEAD and WITHOUT Sat IF required in the system. With medium to high off air signal levels, masthead may not be required. Use the gain control to set output level according to the de-rating rules for the number of analogue channels. UHF Aerial +12V d.c in Line Power PSU350 MAA32U or 38U* UHF In Gain Adjust 230V Mains Input +12V 350mA PSU UHF Out (*MAA22UV, MAA32UV or MAA38UV can also be used ) Trunk Cable Taps etc. Rest of network ii) SINGLE trunk cable using a LOW GAIN MASTHEAD to overcome aerial lead losses and WITHOUT Sat IF. With low to medium off air signal levels, an/or significant aerial downlead loss then a low gain masthead may be required. Use the MATV UHF module gain control to set the output level according to the de-rating rules for the number of analogue channels. UHF Aerial Fit link +12V d.c in Line Power PSU350 MAA32U or 38U* MHA13U/S 13dB Masthead UHF In Gain Adjust 230V Mains Input +12V 350mA PSU UHF Out ( *MAA32UV or MAA38UV can also be used ) Trunk Cable UHF +12V Line Taps etc. Rest of network MAXVIEW LTD . SETCHEY . KING’S LYNN . NORFOLK . PE33 0AT . ENGLAND CUSTOMER HELPLINE: 01553 811000 e-mail: [email protected] web site: www.maxview.ltd.uk Page 4/8 9111141 Iss 6 User Instructions - ‘1V’ UHF and VHF Wideband MATV Digital Amplifier Modules 5. Typical Wideband UHF MATV System Application Diagrams iii) MULTIPLE trunk cables, using MULTI-OUTPUT MASTHEAD and WITHOUT Sat IF required in the system. Sometimes because of the physical layout or the need to add UHF TV to 4 cable IF systems more than 1 trunk cable must be used. With low to medium UHF off air signal levels, a low gain Multi-Output masthead is used to drive up to 4 MATV amplifier modules. This method means that each MATV module gain control is used to set output levels independently on each trunk cable, according to the de-rating rules for the number of analogue channels. For a 4 trunk cable installation using 32dB UHF modules only 2x PSU350 Power Supply Modules and 4x 32dB Modules and 2x BP4063 d.c. leads would be required. UHF Aerial BP4063 d.c. splitter lead Fit link +12V d.c in Line Power MHAS4U/S 4 Output 12dB Masthead O/P 3 & O/P 4 Not connected UHF In Gain Adjust 1 +12V d.c in Line Power MAA32U * No. 1 MAA32U * no. 2 UHF Out UHF In Gain Adjust 2 PSU350 +12V 350mA PSU UHF Out O/P1 Line Power O/P2 +12V Line Power * Trunk Cable No. 1 Taps etc. Taps etc. Rest of network 230V Mains Input MAA22UV or MAA32UV can also be used Trunk Cable No. 2 Rest of network iv) SINGLE trunk cable using a LOW GAIN MASTHEAD to achieve low cost 50dB MATV Head Amplifier. A very cost effective solution to obtain more gain for larger systems with bigger cable losses is to add a low gain Masthead to produce either a 44dB or 50dB (shown below) headend combination. Use the gain control to set the output level according to the de-rating rules for the number of analogue channels. UHF Aerial Fit link +12V d.c in Line Power PSU350 MAA38U* MHA13U/S 13dB Masthead UHF In Gain Adjust 230V Mains Input +12V 350mA PSU UHF Out *MAA38UV can also be used Trunk Cable UHF +12V Line Taps etc. Rest of network 9111141 Iss 6 Page 5/8 User Instructions - ‘1V’ UHF and VHF Wideband MATV Digital Amplifier Modules 5. Typical Wideband UHF MATV System Application Diagrams v) LONG SINGLE trunk cable using 32dB REMOTE EXTENDER AMPLIFIER to extend system reach. Assuming only the In/Out of the Taps on the network have a d.c. path, then a very cost effective solution to extend the system reach in larger systems with bigger trunk cable losses is to add two LPI350 Line Power Extenders and a second +12V d.c. remote powered 32dB UHF MATV module some way along the length of the trunk cable. Use the gain control in each MATV module to optimise the output levels according to the cable losses and de-rating rules for the number of analogue channels. To keep the d.c voltage drop to <0.5V for the remote 32dB UHF Module then the maximum recommended cable distances for the remote 32dB amplifier are: 100m of CT100, 170m of CT125 or 230m of CT165. BP4063 d.c. splitter lead UHF Aerial +12V d.c in Line Power PSU350 Local MAA32U * UHF In Gain Adjust 230V Mains Input +12V 350mA PSU UHF Out * Local LPI 350 N.B. As in example ii, iii or iv, it is no problem to add a low gain masthead to this system and still only require 1x PSU350 to power the combination. +12V d.c in Line Power +12V d.c. MAA32UV can also be used Remote MAA32U * Taps etc. UHF In Gain Adjust UHF Out +12V d.c. Trunk Cable 1st Section Remote LPI 350 Trunk Cable 2nd Section +12V d.c. BP4063 d.c. splitter lead Taps etc. +12V d.c. vi) SINGLE trunk cable, using the MAA22UV, MAA32UV or MAA38UV Module to add UHF to an existing VHF network Rest of network UHF Aerial Fit link UHF Line Power +12V d.c in PSU350 MAA38UV * MHA13U/S 13dB Masthead (Optional) UHF +12V 350mA PSU UHF Gain VHF UHF/VHF In Adjust Input Out 230V Mains Input * MAA22UV or MAA32UV can also be used When upgrading an existing UHF TV and VHF/FM system for DTT then the MAA38UV is ideal. Only the UHF amplifier needs to be replaced and the VHF diplexer section of the MAA22UV, MAA32UV or MAA38UV is connected to the exitsing VHF network. +12V Line MAXVIEW LTD . SETCHEY . KING’S LYNN . NORFOLK . PE33 0AT . ENGLAND CUSTOMER HELPLINE: 01553 811000 e-mail: [email protected] web site: www.maxview.ltd.uk Taps etc. VHF Input Rest of network VHF/UHF Trunk Page 6/8 9111141 Iss 6 User Instructions - ‘1V’ UHF and VHF Wideband MATV Digital Amplifier Modules 6. Typical VHF/UHF MATV System Application Diagrams i) FM ONLY on single trunk cable. MAA32V is supplied preset to the FM position. Use the gain control to set the desired FM launch levels. FM Aerial Push In IN=FM OUT=VHF +12V d.c in PSU350 MAA32V 230V Mains Input +12V 350mA PSU FM/VHF Gain VHF/UHF UHF Input Adjust Output Input N/C Trunk Cable Taps etc. Rest of network ii) FM & UHF on single trunk cable without UHF Masthead. Balance the FM and UHF signal levels onto the system using the VHF and UHF gain controls. Use the UHF module gain control to set the output level according to the de-rating rules for the number of analogue TV channels. BP4063 d.c. splitter lead UHF Aerial Line Power +12V d.c in PSU350 MAA32U* or 38U* UHF In Gain Adjust 230V Mains Input +12V 350mA PSU UHF Out *MAA32UV or MAA38UV can also be used UHF FM Aerial Push In IN=FM OUT=VHF +12V d.c in MAA32V FM/VHF Gain VHF/UHF UHF Input Adjust Output Input VHF/UHF O/P Page 7/8 Taps etc. 9111141 Iss 6 Rest of network User Instructions - ‘1V’ UHF and VHF Wideband MATV Digital Amplifier Modules 6. Typical VHF/UHF MATV System Application Diagrams iii) FM & UHF on single trunk cable with low gain UHF Masthead. Balance the FM and UHF signal levels onto the system using the VHF and UHF gain controls. Use the UHF module gain control to set the output level according to the de-rating rules for the number of analogue TV channels. BP4063 d.c. splitter lead UHF Aerial Line Power +12V d.c in PSU350 MAA32U* or 38U* MHA13U/S 13dB Masthead UHF In Gain Adjust 230V Mains Input +12V 350mA PSU UHF Out * MAA32UV can also be used ( *MAA32UV or MAA38UV can also be used ) +12V Line UHF FM Aerial Push IN=FM OUT=VHF +12V d.c in MAA32V FM/VHF Gain VHF/UHF UHF Input Adjust Output Input VHF/UHF O/P FM Taps etc. Rest of network Many other installation possibilities exist for MATV VHF/UHF Amplifier Module applications. Should you have any questions or require any assistance with system planning please contact the Maxview Customer Helpline on 01553 811000. MAXVIEW LTD . SETCHEY . KING’S LYNN . NORFOLK . PE33 0AT . ENGLAND CUSTOMER HELPLINE: 01553 811000 e-mail: [email protected] web site: www.maxview.ltd.uk Page 8/8 9111141 Iss 6