HEADEND SYSTEM PLANAR-SG24

Transcription

1 HEADEND SYSTEM PLANAR-SG24 HEADEND SYSTEM MODULES ARE MADE AS PROGRAMMABLE SUCH AS FIXED (UPON SEPARATE REQUEST) CHANNELS. HIGH SELECTIVITY OF CHANNEL AMPLIFIERS AND CONVERTERS. HIGH LINEARITY AND INTERFERENCE PROTECTION OF INPUT HEADEND SCHEMATIC. AGC WITH 30 db DEPTH. USING OF MODERN LEADING BRAND ELECTRONIC COMPONENTS ENSURES HIGH RELIABILITY OF HEADEND SYSTEMS. HIGH SELECTIVE CONVERTERS ALLOW TO OPERATE IN ADJACENT CHANNELS AND ENSURE INPUT LEVEL DIFFERENCE IN OPERATIVE AND CLOSEST NON-ADJACENT CHANNELS UP TO 40 db AND MORE. SIGNAL COMBINERS 2/3/4/8 ARE USED FOR TAPPING INPUT SIGNALS AND COMBINING OF OUTPUT SIGNALS. COMBINERS PROVIDE FOR SIGNAL LEVEL MANUAL TUNING. OUTPUT COMBINER IS ENSURED BY TEST PORT -30 db. HEADEND SYSTEM IS REALIZED AS SEPARATE MODULE CONSTRUCTION INTENDED FOR INDOOR INSTALLATION. HEADEND SYSTEM ENSURES ROUND-CLOCK OPERATION. HEADEND CONNECTION IS MADE BY «F»-CONNECTORS. Modern headend systems must ensure strict demands: high input interference protection, high selectivity, low cost. Headend systems from PLANAR company are designed with the meaning of these conditions. Large number of received programs and high difference level between them claim strict demands to interference protection and linearity of headend system input. Therefore the input schematic contains an effective channel filter and a linear amplifier with AGC. This solution allows to process television signals, which have the level difference in non-adjacent channels up to 40 db. AGC ensures needed channel gain, besides there is possibility to change manually the input signal level in input tap. «PLANAR SG-24» headend has great functionality provided wide range released amplifiers, converters, modulators and combiners (depends on the order). The separate module construction allows to increase number of channels. The composition, configuration and headend price depend on customer tasks and television signal reception conditions. Channel modules are mounted on a frame (up to 8 channels per frame). Also power supplies and combiners are set on the same frame. 2 frames and more are used while ordering more than 8 channels. Frames can be made to fasten on the wall or mount into standard 19" rack. 8-channel headend structure is shown in fig.1. PLANAR company makes converters with single and double frequency transformation. Recommended to use single transformation converters for systems with small number of channels. They ensure high quality reception of TV signals while level difference between input nonadjacent channels up to 28 db. Single transformation converters do not allow to realize all combinations of input and output channels. Double transformation converters have high selectivity, which ensures operation in adjacent channels. They allow to realize high quality reception while input level difference in adgacent channels up to 40 db. Moreover, they do not have prohibited combinations of input and output channels that allows to realize all channel combinations including adjacent ones. Converters with higher selectivity use additional SAW filter. Recommended for MMDS systems and for complex reception conditions. While using programmable converters it is necessary to remember that TV tuner is set as input. The selectivity of tuner input filter is significant worse than channel filter selectivity of converters with fixed channels. Therefore it is recommended to use the channel filter at the programmable converter input while large input level differences. 1.4

2 CONVERTERS AFR (AMPLITUDE-FREQUENCY RESPONSE) WITH ONE AND TWO SAW FILTERS 1 Figure 1. 8-channel headend srtucture While combining signals from more than 16 programmable modules, to save signal/noise ratio at the headend input it is recommended to use channel and pass band filters. 1.5

3 RF signal to non-weighted noise ratio inside of 5.75 MHz band, db, or better 60 Output level per each channel (depends on configuration), db, µv AGC, db, or better 30 The nearest non-adjacent channel selectivity inside of TV range, db, or better 70/50/40 Mirror channel selectivity (for converters), db, or better 65 Spurious frequency output level, dbс, or less -65 Image carrier deviation, khz, or less 20 Operating voltage, V 220 (+10-15%) 50 Hz Environment condition: temperature, о С relative humidity at 25 о С, % до 80 atmospheric pressure, kpa Dimensions, mm 4-channel version 284x250x155 6-channel version 372x250x155 8-channel version 460x250x155 Weight, kg: 4-channel version 3 6-channel version 3,6 8-channel version 3,9 1.6

4 PROGRAMMABLE MODULATOR 1 Modulator is intended for transformation of full colour video signal and audio carrier signal to the radio signal of a TV channel. Modulator allows to operate in adjacent channels. Type МS410 МS810 Image carrier frequency range, MHz Image carrier frequency step, MHz 0,25 Input video level, V 0,7-1,4 / 75 OHm Input audio level, V / 10 kohm Image carrier to sound carrier ratio, db Image carrier deviation, khz, or less 20 Sound subcarrier frequency deviation, khz, or less 0,1 Spurious frequency output level, dbс, or less 60 Differential gain, %, or less 3,5 Differential phase, deg, or less 4,0 Brightness signal to fluctuation interference weighted value ratio, db, or better 58 Current consumption, A, or less 0,42 Modulator programming is made with help of «PS-24» programmer or a computer via COM-port. Modulator programs the following parameters: -output frequency; -input level VIDEO; -input level AUDIO; -image carrier and audio carrier ratio. 1.7

5 PROGRAMMABLE MODULATOR FM MA100 Modulator is intended to form the signal of stereophonic broadcasting with pilot-tone. Type MА100 Output level, dbµv 110 Output frequency range, MHz Output frequency setting step, MHz 0,1 Input level, mv / 10 kom Frequency deviation, khz ±75 Output frequency deviation, khz, or less ±10 Spurious frequency output level, db, or less -60 Harmonic coefficient, %, or less 0,5 Extraneous AM modulation, %, or less 1 Enter channel isolation, db, not less 30 Predistortion circuit characteristic time, µs 50 Current consumption, A, or less 0,13 Modulator programming is made with help of «PS-24» programmer or a computer via COM-port. FM modulator programs the following parameters: -output frequency; -input level. 1.8

6 PROGRAMMABLE CONVERTER 1 Converters are intended for the frequency transformation of reception channel radio signal to the radio signal of a distribution channel. It is allows to program input and output frequencies of the image carrier. Type CS410 CS810 Input level, dbµv RF signal to non-weighted noise ratio inside of 5.75 MHz band, 58 db, or better, dbµv 70 Image carrier input frequency range, MHz Image carrier output frequency range, MHz Image carrier programmable step, MHz 0,25 Gain, db, or better 56 Noise figure, db, or less 9 Output level deviation for input level 62-92, dbµv, or less + 1 The nearest non-adjacent channel selectivity inside of TV range, db, or better 70 Mirror channel selectivity, db, or better MHz, db, or better MHz, db, or better MHz, db, or better 50 Spurious frequency output level, dbc, or better - 60 Flatness, db, or less 2 Current consumption, A, or less 0,4 Converter programming is made with help of «PS-24» programmer or a computer via COM-port. Converter programs the following parameters: - input frequency; - output frequency. 1.9

7 PROGRAMMABLE DEMODULATOR DM100 Demodulator is intended for the broadcasting signal transformation in range MHz to full colour video signal and audio carrier signal. Demodulator is designed as «parallel» audio channel structure that allows to minimize distortions caused with mutual influence of video signal and audio carrier signal. Demodulator ensures small differential amplitude and phase distortions. Type DМ100 Frequency range, MHz Programmable step, khz 50 Input level, dbµv Output video level, V 1 / 75 Оhm Output audio level, V 0,25 / 10 kоhm Image signal to weighted fluctuation interference effective value ratio at RF signal input level 70 dbµv, or better 55 Differential phase, deg 2 Differential gain, % 2 Group delay time of the image channel in accordance with GOST R Mirror channel selectivity, db, or better MHz, db, or better MHz, db, or better MHz, db, or better 50 Current consumption, A, or less 0,21 Programming of the demodulator input frequency is made with help of «PS-24» programmer or the computer via COM-port. 1.10

8 SINGLE RANGE MODULATOR 1 Modulator is intended for full colour video signal and audio carrier signal transformation to a radio signal of any channel. Modulators allow to operate in adjacent channels. Type VHF-М-NN 18М / UHF-М-NN 18М Input video level, V 0,7-1,4 / 75 Ohm Input audio level, mv 370 / 10 kohm Image carrier to sound carrier ratio, db Image carrier deviation, khz, or less 20 Sound subcarrier frequency deviation, khz, or less 0,1 Spurious frequency output level, dbс, or better 65 Differential gain, %, or less 3,5 Differential phase, deg, or less 4,0 Brightness signal to fluctuation interference weighted value ratio, db, or better 60 Current consumption, A, or less 0,

9 HIGH SELECTIVE CONVERTERS AND CHANNEL AMPLIFIERS Converters are intended for the frequency transformation of reception channel radio signal to the radio signal of a distribution channel. They contain pass band filters, SAW filter, mixers, quartz heterodynes, an amplifier, AGC system. Using of the double frequency transformation allows to use all combinations of input and output channels while converting. SAW filter allows to operate in adjacent channels. Type KV-56А18М / КV-40А18М Input level, dbµv 62-92/ RF signal to non-weighted noise ratio inside of 5.75 MHz band, 60 db, or better, dbµv 70/80 Gain, or better 56/40 Noise figure, db, or less 9 Output level deviation for input level 62-92/ dbµv, or less + 1 Image RF signal attenuation at frequencies stayed relatevely image carrier frequency on minus: 2,00 MHz, db 50 1,25 MHz, db 3 The nearest non-adjacent channel selectivity inside of TV range, db, or better 70 Mirror channel selectivity, db, or better 65 Spurious frequency output level, dbc, or better 65 Flatness, db, or less 1,5 Current consumption, A, or less 0,

10 HIGH SELECTIVE CONVERTERS AND CHANNEL AMPLIFIERS WITH SUPPLEMENT SAW-AMPLIFIER 1 Converters are intended for the frequency transformation of reception channel radio signal to the radio signal of a distribution channel. They contain pass band filters, two SAW filters, mixers, quartz heterodynes, an amplifier, AGC system. Using of the double frequency transformation allows to use all combinations of input and output channels while converting. Two SAW filters are used to increase selectivity in adjacent channels up to 60 db. Recommended for MMDS systems and complex reception conditions (adjacent input and output channels). Type Converter KV-56A18C Amplifier K-56A18C Input level, dbµv Input level at RF image signal to non-weighted noise ratio in band 5.75 MHz not less 60dB, dbµv 70 Gain, or better 56 Noise figure, db, or less 9 Output level deviation for input level dbµv, or less + 1 RF image signal attenuation at frequencies displaced from image carrier: on minus 1.50 MHz, db 70 on plus 8.00 MHz, db 70 Mirror channel selectivity, db, or better 65 Spurious frequency output level, dbc, or better 65 Flatness, db, or less 1,5 Current consumption, A, or less 0,

11 CONVERTERS AND CHANNEL AMPLIFIERS DIGITAL Convertes are intended for the frequency transormation of DVG-C DUB-T diaital radiosignal. They contain pass band filterss, two SAW filterss, mixers, quartz heterodynes, an amplifier, AGC system. Converters, s based on connerters with Additonal SAW filter. Type Converter KV-56А18TS Amplifier K-56А18TS Input level, dbµv Output level, dbµv 108 Gain, or better 56 Noise figure, db, or less 9 Heterodyne noise figure for frequency offset 100kHz, dbc/hz, or less 105 Output level deviation for input level dbµv, or less + 1 Bandwidth at 3 db level, MHz, not less 7,65 Mirror channel selectivity, db, or better 65 Spurious frequency output level, dbc, or better 65 Flatness, db, or less 1,5 Current consumption, A, or less 0,

12 CONVERTERS 1 Converters are intended for the frequency transformation of reception channel radio signal to the radio signal of a distribution channel. They contain pass band filters, mixers, quartz heterodyne, an amplifier, AGC system. Type КV-56А18 / КV-40А18 Input level, dbµv 62-92/ RF signal to non-weighted noise ratio inside of 5.75 MHz band, 60 db, or better, dbµv 70/80 Gain, db, or batter 56/40 Noise figure, db, or less 9 Spurious frequency output level, dbc, or better 65 Output level deviation for input level 62-92/ dbµv, db, or less + 1 The nearest non-adjacent channel selectivity inside of TV range, db, or better 40 Flatness, db, or less 1,5 Current consumption, A, or less 0,3 MODULATORS Modulator is intended for full colour video signal and audio carrier signal transformation to a radio signal of any channel. They are made with partial (20-30 db) suppression of the mirror frequency band Type VHF-М-NN 18 / UHF-М-NN 18 Input video level, V 0,7-1,4/ 75 Оhm Input audio level, mv 370 / 10 kоhm Image carrier to sound carrier ratio, db Image carrier deviation, khz, or less 20 Sound subcarrier frequency deviation, khz, or less 0,1 Differential gain, %, or less 3,5 Differential phase, deg, or less 4,0 Brightness signal to fluctuation interference weighted value ratio, db, or better 60 Current consumption, A, or less 0,22/0,3 1.15

13 CHANNEL AMPLIFIERS Channel amplifiers are intended to amplify one TV channel radio signal of VHF or UHF range. They contain two pass band filters, an amplifier, AGS system. Type МV-К-NN 56А18 DМV-К-NN 40А18 МV-К-NN 40А18 DМV-К-NN 56А18 Input level, dbµv 62-92/ RF signal to non-weighted noise ratio inside of 5.75 MHz band, 60 db, or better, dbµv 70/80 Gain, or better 56/40 Noise figure, db, or less 9 Output level deviation for input level 62-92/78-108, dbµv, or less + 1 The nearest non-adjacent channel selectivity, db, or better 40 Level deviation for frequency range, db, or less 1,5 Current consumption, A, or less 0,18/0,16 0,25/0,23 FM AMPLIFIERS Amplifiers are intended to amplify the group FM range radio signal. They contain two pass band filters, a variable gain amplifer. Type VHF-K-FM Input level, dbuv 66-74/ Gain, db, not less 40 Manual gain adjustment, db, not less 25 Noise figure, db, or less 9 Flatness in operating frequency range, db, or less 1,5 Current consumption, A, or less 0,

14 POWER SUPPLIES Power supplies are intended for feeding of headend system modules. Features: -overload protection; -auxiliary terminal for outer antenna amplifier. 1 Type PS12/2 PS12/3 Output voltage, V 12±0,1 Load current, A, or better 2 3,4 Auxiliary output voltage, V 12±0,1 Auxiliary load current, A, or better 0,15 PROGRAMMER PS-24 Programmer is intended for visual control, setting, editing of changeable parameters of «PLANAR-SG24», «PLANAR-SG3000» headends modules. The control is made with help of 16 buttons, information represents on LCD alphanumerical display. Provided a sound control of button pressing. ADAPTER RS232-SG24 «RS232-SG24» adapter is intended for connection of «PLANAR-SG24», «PLANAR-SG3000» headends with the computer controlling parameters of headend modules. Connecting is made via 9-pin connector of COM-port. The software is included together with standard shipment set. DISTRIBUTION SIGNAL DEVICE Distribution signal devices are intended for tapping of the input TV signal to channel amplifier (converter) inputs and mixing of TV signals from channel amplifier, converters and modulator outputs. Output combiner has a test port. Insertion loss for two outputs, db, or less 3,5 Isolation, db, or better 26 Input/output level depth control, db, or better 9 Test point attenuation, db 30±2 Distribution signal devices contain taps 2/3/4, variable attenuators. Signal taps are used in different combinations depend on headend system configuration. 1.17