Contents
Contents
1. mm inch 1000 maximum 6x minimum 6x minimum 125 400 05 20 21 0 81 32 250 800 1 0 17 18 1 15 45 Before trimming and soldering the first cable end thread all connector ac cessories on the cable end in the following order the hollow nut oriented with the smaller diameter to the cable end the first of the two washers the plastic ring the second washer Solder all 6 wires to contacts 2 and 4 through 7 Solder the shield to contact nr 3 ACOM2000SW PC7 female soldering view Now you can assembly the connector accessories Tighten the plastic ring of the 7 contact connector firmly in order to protect it hermetically When you use the ACOM2000S automatic antenna selector before trim ming and soldering the second cable end thread the hollow nut of the 8 contact connector oriented with the smaller diameter to the cable end Solder all 6 wires and the shield to mate directly by numbers to the 8 contact connector for the selector side as follows 20005 14 female soldering view 4 8 not connected When not ACOM2000S but another control unit is used the following in formation may be needed to prepare the input control cable Contact Signal name Functional description nr 27V Power supply input 15 maximum nr 2 RDY Output high when ready to transmit nr 3 GND Common ground shield nr 4 Input BCD bit 0 low when 02. selected nr 5 A2 Input BCD bit low when A2 selected nr 6 4 Input BCD bit 2 low when 4 selected nr 7 A8 Input BCD bit 3 low when 8 selected See S 4 la and fig 4 1 for details on how the input and output signals to be used NOTE yn When the Code Levels selector is in pos levels become high and vice versa all low c Connect the common coaxial cable to the COMMON connector and then all antenna cables to the respective antenna connectors Make a list of antenna number destinations Place the plastic protection caps onto all free antenna connectors and keep the rest for possible connection changes and or shipment d Connect the control cable the last 3 OPERATION After following all instructions 5 2 you can power the antenna switch and control it through the control cable 3 1 OPERATION IN THE ACOM SYSTEM Operation using the ACOM2000S antenna selector the ACOM2000A HF linear amplifier and or the ACOM DOS application for PC is automatic No operator intervention is needed to change antennas Anyway you may still change antennas manually from the selector UP DOWN buttons or amplifier s RCU as well 10 3 2 USER SYSTEMS OPERATION When used in another system the ACOM2000SW remote antenna switch must be powered with 27VDC 150mA and can be controlled via the 4 bit BCD code This code could be generated from any automatic antenna system or m
3. the antennas area a bit longer common and control cables would save length from multiple antenna cables Keep the highest frequency cables as short as possible even if for the lower frequencies the cables become longer The antenna switch design is suitable for outdoor mounting Neverthe less if you select or make especially for it a shady and dry place the an tenna selector materials would age slowly i e last longer Two holes 9mm diameter and 120mm distanced are available on the mounting bracket to firm it to the mounting base see Fig 2 1 The principal operating position of the antenna selector is with the cover up connectors pointing down but when it is indoor used any position is OK 2 3 Connections Connections must be accomplished in the order described below before you apply power supply or control to the antenna switch a First tighten the lightning protection grounding leads under either of the two wing nuts of the antenna switch b Preparation of input control cable A 6 wire shielded cable should be used for the input control The needed wire cross section depends on the distance from the antenna switch to the control unit for instance 20005 automatic antenna selector in your station You can determine cable specifications proportionally from the fol lowing table Cable lenght wire cross section wire diameter meters feet mm AWG SWG
4. Contents GENERAL INFORMATION 1 2 Owner Assistance 1 3 Equipment Supplied and Options 1 4 Features 1 5 Safety Considerations Explicit Definitions 2 INSTALLATION 2 1 Unpacking and Initial Inspection 2 2 Place selection and mechanical mount 2 3 Connections 3 OPERATION 3 1 OPERATION IN THE ACOM SYSTEM 3 2 USER SYSTEMS OPERATION 4 MAINTENANCE 4 1 The ACOM2000SW Schematic Diagram 4 2 Troubleshooting 5 SPECIFICATIONS 14 5 1 Parameters 14 5 2 Functions 15 5 3 Storage and Shipment 15 GENERAL INFORMATION l I Introduction and Description This manual explains the installation operation and maintenance of the ACOM2000SW remote 10 way antenna switch The ACOM2000SW is a remote out of 10 antennas switch especially de signed for use with the ACOM2000S automatic antenna selector and the ACOM2000A automatic HF linear amplifier Nevertheless the ACOM2000SW can be easily integrated in other automatic antenna systems or manually controlled too 1 2 Owner Assistance If assistance is needed you should contact your local dealer first If you still have an issue you need to discuss with one of ACOM s specialists The contact information is as follows fax 359 2 920 96 56 e mail acom mail orbitel bg acom aster net or by mail blvd Nikola Mushanov 151 1330 Sofia Bulgaria 1 3 Equipment Supplied and Options The ACOM2000SW remote antenna switch plus a mating cable connect
5. ON Should you need to transport the antenna switch use the original packing as described below First disconnect antenna cables afterwards the common coaxial cable and then the control cable Remove the ground connection the last Replace all plastic protective caps Finally pack the antenna switch in the original carton Fill in the empty space if the ACOM2000S automatic antenna selec tor will not be transported a Storage environments the antenna switch must be kept packed in dry and ventilated unheated premises without chemically active substances ac ids alkalies etc in the following climatic environment temperature range 40 to 70 degs Celsius humidity up to 75 35 degs Celsius b Shipping Size and Weight W 78mm x 2194 x 82 2 5kg 4kg 15 when purchased with automatic antenna selector 20005 c Shipping environments all types of transportation including aircraft bag gage section
6. anually via a simple coding manual switch plus 4 resistors 1 2kOhm IW Connect them similarly to the RDY output see fig 4 Antenna switching will follow the input BCD code number passed to the control input The RDY output signal will stay in logical high state always when an antenna is switched on and is ready to transmit You could use this signal to improve switching reliability or just monitor it via LED for feed back information new antenna number is requested changing the input BCD code first the RDY output falls to the logical low state and the incoming RF power is checked If its level is greater than 0 12W the switching will be suspended until RF disappears When switching is safe the request will be executed and the RDY signal returns in logical high for only 0 15 seconds We recommend that some inexpensive lowpass filters be added to all con trol cable wires in your control box Look into the schematic diagram of the antenna switch just to get an idea Fig 4 1 Filters with cut off frequency substantially below the lowest operating frequency for instance 50 00kHz will substantially improve the EMC performance of your control unit 4 MAINTENANCE 4 1 The ACOM2000SW Schematic Diagram See Fig 4 The remote antenna switch ACOM2000SW has two main parts control circuit and the proper switch a The control circuit decodes the input 4 bit BCD antenna number to out of 10 output relay driving si
7. e RF disappears In such a case the RDY signal is tied to low via U9C for the period when the input and output antenna numbers are not matching The antenna number decoder inputs are selectively connected to the nor mal or inverted D latch outputs Selection is done via four jumpers Code Levels The 4028 type BCD to decimal decoder is used U3 to convert the antenna number from 4 bit parallel BCD code into out of 10 antennas selection The relay coils driver consists of U8 U9 and QI The first coil ends of all electromagnetic actuators are fed in parallel from 27V through the tran sistor QI and or the resistor 2 The selected antenna output ties down the second end of the respective coil in order to switch on the actuator Meanwhile the transistor is being saturated for 50ms via the UP signal derived from the monostable In this way full voltage is applied across the newly switched coil until the actuator pulls in After the switching QI cuts off so 2 reduces the coil heat in settled condition The power supply from the control unit is fed to the antenna switch via 1 27V and 3 27V return and GND The consumption is less than 150 12 The second main part of the ACOM2000SW properly the switch comprises 10 identical electro magnetic actuators Every actuator moves separate flat coaxial line shaped spring contact The strips are gold over silver plated and the line cha
8. gnals Meanwhile it continuously monitors the incoming RF power in order not to allow hot contact switching if accidentally antenna number is changed during a transmission Four func tional blocks serve this I O interface antenna changes founding register antenna number decoder and relay coils driver The interface circuit receives the input BCD code Al 2 4 from JP1 4 JP1 7 via four 4093 type Schmidt inputs and converts them into 0 5V logic levels 8 on pins 10 11 4 and of UI The RDY output signal is buffered via 2003 Darlington arrays U9B U9C See 4 The antenna changes founding register is based on the 4063 type 4 bit magnitude comparator U4 It continuously compares the parallel input BCD code A2 A4 antenna number command on pins 9 11 14 with the currently selected antenna number on pins 10 12 13 15 passed from the 4042 type quad clocked D latch If a difference is found the comparator generates a low clock pulse on pin 6 A B which is for warded to the D latch in order to transfer and register the new antenna number Every clock pulse is 50ms extended via the 4047 type monostable U7 in order to allow the electromagnetic actuators to execute the re ceived command This pulse may be additionaly delayed if RF power is de tected at the same time via the RF signal detector U5A voltage comparator and U6 logic until th
9. nger your or other s health and life and not to damage the antenna switch and the equipment connected with it not covered by warranty The manufacturer is not liable for another s actions and responsibil ity shall be assumed by the doer CAUTION To avoid damage not covered under warranty read the Installation 5 2 of this operating manual fully If you have any doubts about the installation operation or safety of the antenna switch please consult your dealer 2 INSTALLATION 2 1 Unpacking and Initial Inspection NOTE Before you start any action on installing the antenna switch thoroughly read through this manual First carefully inspect the cardboard carton and its con tents for physical damage If damage is noticed no tify your dealer immediately Delay may infringe carrier s warranty conditions Keep all packing for possible future transportation Check carefully the serial number of the antenna switch with the Table of Individual Data Table 2 1 If you find any discrepancies notify your dealer immediately to have your warranty information corrected Serial Number BCD code positive inverted Table 2 1 Individual Data 2 2 Place selection and mechanical mount When selecting the mounting place have in mind the following consider ations Keep the grounding length as short as practical Minimize the coaxial cable length Normally a place near
10. or for input control and power supply plastic protective caps and this manual are shipped in one cardboard carton The automatic antenna selector 20005 is a separably purchasable option If you have purchased it the same carton will contain both units 1 4 Features One out of 10 antennas 50 Ohm up to 60MHz frequency range Up to 5kW continuous carrier Teflon PTFE insulated connectors for 100 duty cycle continuous operation Gold plated and bifurcated contacts for excellent reception no contact derived cross modulation phenomenon Flat coaxial line construction for excellent VSWR and crosstalk isolation Anti hot switching self protection for reliable contact operation moni tors RF incoming power and generates a ready to transmit output signal for maximum operating flexibility Only 0 15 seconds operating time Control and power supply mate to the ACOM2000S automatic antenna selector which is directly compatible with the ACOM2000A automatic HF linear amplifier Compatible with other automatic systems thanks to the simple 4 bit BCD control code positive or inverted internally selectable For manual control only a simple BCD coding switch plus 27VDC 150mA unregulated power supply are enough Grounds unused antennas during operation for excellent crosstalk isola tion after switching off all antennas are automatically grounded for maxi mum lightning safety Ea
11. racteristic impedance is 50 Ohm for minimum RF reflections best feed line homogenity and maximum crosstalk isolation All 10 lines begin from a separate type SO239A connector and are directed to the center Their contact ends normally lay on the chassis plane i e are grounded When any contact is being actuated it transfers to a central collector disc to connect to the common UHF connector The central collector disc is massive brass and gold over silver plated too The result is a very quick heat diffusion from the contact area The contact ends are bifurcated and the two branches are different length This along with the goldened contact surfaces improves the long term contact reliability and ensures a nonlinear free reception even at extremely low signal levels The signal detector PCB D1 and its current transformer TA are mounted directly on the central common connector 4 2 Troubleshooting If any function is not properly executed check control unit first and then the external cabling S 2 3 At the cable end check the power supply voltage 27VDC its behavior during switching and also the control BCD code and code low and high levels See 5 5 g for specifications Check all cables for continuity and or short circuit If the problem persists contact your dealer first directly see 5 1 2 5 SPECIFICATIONS 5 1 Parameters a Operating frequency range 0 1 to 60MH
12. sy to install only 2 holes needed mounting bracket included Dust and rain protected IP53 30 to 60degs C operating 1 5 Safety Considerations Explicit Definitions The ACOM2000SW remote antenna switch is designed to meet interna tional safety standards It is powered with safe voltage 27VDC but it must always be connected to a proper lightni ng protection grounding system for safe operation This operating manual contains information precautions indications for cau tions and warnings which must be followed by the user to ensure safe op eration and to keep the ACOM2000SW in safe operating condition PRECAUTIONS The EXPLICIT DEFINITIONS described below apply to this operating 4 manual WARN IN G notes call attention to a procedure which if not correctly performed could result in personal injury fire hazard or electric shock CAUTION notes call attention to a procedure which if not correctly performed could result in equipment damage not only in the switch N OTE notes call attention to a procedure which if not correctly performed could result in inconvenience only WARNING HIGH VOLTAGE NEVER use the antenna switch if not connected to a proper lightning protection grounding sys tem NEVER TOUCH AN ANTENNA during transmission this may result in an electric shock or burn WARNING Do not undertake on your own repairs or changes in the construction of the antenna switch in order not to enda
13. z continuously b Rated power continuous for 0 1 to 30MHz 5000W VSWR 1 1 2500W VSWR 2 1 1600W VSWR 3 1 up to 60MHz 3600W VSWR 1 1 1800W VSWR 2 1 1200W VSWR 3 1 c Characteristic impedance 50 Ohm unbalanced UHF type SO239A PTFE connectors 9 Mismatch VSWR for 0 1 to 2MHz better than 1 02 1 up to 30MHz better than 1 08 1 up to 60MHz better than 1 20 1 Crosstalk isolation for 0 to 2MHz better than 100dB up to 30MHz better than 70dB up to 60MHz better than 66dB f Operating time less than 0 15 seconds including bounces g Parallel input output control 4 bit BCD input code positive or inverted internally selectable plus RDY output signal logical low input 1 1 25 2kOhm input resistance logical high input 7 5 18V 1 2kOhm input resistance logical low output 0 1V 15 drive 60mA sink logical high output 20 30V 2kOhm output resistance h Power Supply 24 31 V 150 maximum consumption i Size amp Weight operating 160mm diameter 105mm height 9kg j Operating temperature range 30 60 degs Celsius k Protection degree IP53 dust and rain 5 2 Functions a Switching capacity 10 antennas to output b Anti hot switching self protected c Ready to transmit output signal d Unused antennas grounding all antennas when not powered 5 3 Storage and Shipment CAUTI
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