DIGITAL MMDS TRANSMITTER User Manual
Contents
1. JX26XXXA B DIGITAL MMDS TRANSMITTER User Manual V3 0 Chengdu Jiexun Electronics Co Ltd Digital MMDS Transmitter User Manual Chengdu Jiexun Electronics Co Ltd Content As salety CADHONS y n y k d n N dii DIS hana 2 B Package Check a ceeded a AN NA k ra kk N a AN NA k y n ta ta ka d k 2 OR OA 2 D The whole appearance figure and indicator connector explanations 4 ly Outdoor tras MES Eo haa o seme sie etd ll JJ mm mm mm o 4 EE Rear Wonder 5 E Fitting and Debugging nei en seai nienean 5 TH trabstpit ter HIL SL SR ans las clan Seed aes lan tud aes dance OR N ENA Ne de 5 25 THE transmitter TO ST O diet Aie 6 35 Debweeme transmitters ES 6 FN am xc 8 Demands of storing and transportation 9 H Electrical Schematic ioa lema eom la sien Mop eae 9 ls Model Dl breui e 9 Asena Db Ny NS de tnt 9 I Specifications for Digital Analog MMDS Transmitter 10 Digital MMDS Transmitter User Manual Chengdu Jiexun Electronics Co Ltd A Safety Cautions Provide enough ventilate space for equipment Clean equipment by soft cloth and PH 7 cleaning liquid2. year G Demands of storing and transportation When the transmitter is transported its packages must be shockproof extrusion proof rainproof and waterproof It 15 loaded and discharged carefully H Electrical Schematic Figure 1 Model Illuminating JX ee 2 6G Central hel m end Indoor Outdoor abbreviation Level 2 Schematic Drawing Digital MMDS Transmitter User Manual Chengdu Jiexun Electronics Co Ltd L e Nc G AC220V 1 ME optional switch power eer SN TET power protection protection 12V 5V controlling 10V 28V director signal Da IF amp 7 up converter BPF pull PA PA Fin RFout AGC ALC controlling IF test oscillation RFtest AGC Po Po director Model JX26005 010 020 030 050 100 200 transmitter circuit schematic figure I Specifications for Digital Analog MMDS Transmitter JX2601 JX2602 JX2603 JX2605 JX2610 JX2620 Model RF output power LOW 20W 30W SOW 100W 200W P P 64QAM ACPR dBe Es gt 25 QPSK RF output 2500 2700MHz adjust freely the bandwidth of carrier signals frequency within 200Mhz 50Q N model connector return loss 20dB RF frequency BW 200MHz band ripple lt 2 0dB in band of I0MHz response lt 1
3. 0dB Digital MMDS Transmitter User Manual Chengdu Jiexun Electronics Co Ltd a TT TT TTTTTT 2033MHz Customized stabilizer 1x10 IF input signal 467 667MHz 670 870MHZz j 1830MHz Special frequency Requirements IF input port 75Q F type connector return loss 15dB spurious rejection 60dBc compared with the level of digital signals in band AGC ALC 20dB temperature 20 45 C humidity uncondensation circumstance relative humidity 0 95 unsaturation AC 220V 10 50 60Hz power consumption change with power supply output power dimension L W H Up to different power weight Kg changing with output power 75Q F type 50Q N type 7 hole connector for test 3 hole connector for AC power supply AC power switcher electricity Control Panel indicator power supply indicator power indicator IF signal indicator
4. Forbid connecting or changing cable when equipment powered on Forbid to take off equipment case Forbid equipment from exposing in overheat over frozen or over humidity places Keep liquid spray or other things from the equipment inside B Package Check When users open the package of the equipment it 15 necessary to check items according to packing list Normally it should include the following items Manual book Ipc Transmitter Iset Power supply Ipc Key 2pcs Fixed rack 2pc M12 bolts 20pcs NJ NJ 3m microwave Cable RF jumper cable Ipc C System Summarization JX26XXXA B series transmitter adopts frequency converting working model Firstly input modulated intermediate carrier secondly up convert the carrier to microwave frequency band thirdly amplify it by the way of high gain and high linearity and connect it to 50 N output connector jack of panel When using transmitter connect it to transmitter s antenna by RF jumper feed cable The Digital MMDS Transmitter User Manual Chengdu Jiexun Electronics Co Ltd transmitter has the continuous working capability and this capability depends on all components of transmitter and make sure to provide steady power supply system and lighting protection equipment etc In order to suitable to large changing range of input IF signal this transmitter 15 designed with close loop automatic 20dBc electrical level controlling to keep input level controlled within 20dB thus
5. ator step by 1dB until the power indicator Po lights on at the same time all the rest indicators such as PI Po and DC light on Po indicator will take process from off to on When the output power of transmitter just reaches to the rate working power at this moment the AGC Auto Digital MMDS Transmitter User Manual Chengdu Jiexun Electronics Co Ltd Gain Controlling doesn t begin to work It is shown as picture 3 Picture 3 5 Keeping adjusting input level of modulator step by 1dB as 4 until the AGC is getting light The control level by AGC is about 5 7dB when all the lights including PI AGC Po DC light on the transmitter works steadily under controlled It is shown as Picture 4 Picture 4 6 Ifthe IF isn t from modulator but others kinds such as from fiber receiver or the wireless relays etc should adjust IF output level and increase signal level from low to high to follow the above process as from 1 to 5 F Maintenance Digital MMDS Transmitter User Manual Chengdu Jiexun Electronics Co Ltd Transmitter s warranty is one year manufacturer 15 responsible for repair under the Natural circumstance without including any human causes Manufacturer 15 responsible for maintenance for above one year warranty with cost payment If the transmitter has strong requirements for cooling and heat radiator by a blower it needs to exchange another new blower every two years and check it every
6. er is connected well with load or transmitting antenna before switch on the power of transmitter please don t run it without load which will damage transmitter Make sure that RF out port is connected to transmitting antenna system or at least 100w power loader then testing impedance between IF input signal cable s crust ground and ground of IF modulator cables is nearly zero This implies that ground s connecting 15 well otherwise we must check weather the transmitter 1s not connected to ground or connecting ground 1s not well 3 Debugging transmitter 1 This transmitter level range 30dBm 77dBuv 15dBm 92dBuv 2 Set each modulators level to 30dBm 77dBuv for standby Test Transmitter without load When switch it on power indicator DC lights on rest indicators are off transmitter works in normal status Then switch it off for standby It is shown as picture 1 Digital MMDS Transmitter User Manual Chengdu Jiexun Electronics Co Ltd Picture 1 3 when connect IF signal to transmitter and switch it on at the same time the indicator of Pi and DC light on but the rest indicators are off Note please increase or decrease the input level of modulator under different circumstance If input level from modulator is lower than minimum level of transmitter s demand the output power will be lower than the rate power of transmitter It is shown as picture 2 Picture 2 4 Increase the input level of modul
7. etallic radiator and wind power are used to radiate heat D The whole appearance figure and indicator connector explanations 1 Out door transmitter 50 200W 50 100W 5 20W Digital MMDS Transmitter User Manual Chengdu Jiexun Electronics Co Ltd 2 Rear Panel IF Po LC p PRA 7 L 9 TET PIT TT TTT X LL d i Connector Explanations Y V m 1 IF signal input connector 2 Input signal level indicator 3 Controlling output power indicator 4 Direct current power indicator 5 AC220V alternating current power connector 6 Power supplying switch 7 RF outputting connector E Fitting and Debugging 1 The transmitter fitting Firstly install equipment in suitable place The parts are assembled and fitted on the shelf of the transmitter Secondly the ground connector of transmitter must be connected to the ground connector of the building s ground connector or metallic tower and this machine must be supplied by the power supply The IF Modulator Digital MMDS Transmitter User Manual Chengdu Jiexun Electronics Co Ltd and its cables must be connected to IF cables of transmitter firmly RF output cables must be connected to the feeding cables of antenna firmly these connectors and cables must be treated as waterproof 2 The transmitter testing Alarm Please make sure port of transmitt
8. it could maintain the output carrier power unchanged relatively In order to suitable to working in abnormal situations to protect the transmitter from unnecessary damages this transmitter 1s designed with internal overheat protection such as when temperature is higher than 60 C it will cut off power automatically All active components such as amplifier are designed with self protections for over current over voltage short circuit current This transmitter is compatible with digital and analog baseband signal adapts to IF intermediate carrier of adopting digital modulation such as QPSK QAM COFDM etc But it will lead to different RF output level from the same transmitter because of different modulation methods This transmitter has been adjusted according to its modulation mode thus it will not need to be adjusted again when used When need to change modulation it should be done by its manufacturer This transmitter adopts blind searching receiving system Please compare the test results for some main specifications to check transmitter When in use only connect input signal from transmitting antenna and power supply for transmitter input needed IF signal then power it on to work without any extra adjustments Digital MMDS Transmitter User Manual Chengdu Jiexun Electronics Co Ltd When the output power 15 lower than 50W the metallic radiator 15 used to radiate heat naturally When the output power is higher than 100W both the m
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