OM1002+ - OM Power
Contents
1. O 2 a E O N LD Switching time 20ms IN OUTPUT 15ms OUT2. CAUTION Before switching PA on check connections between PA and TCVR Never try to change antenna during a transmission to avoid warranty loss 5 1 Operation Elements After switch PA ON green switch on the front panel main supply will be activated the touchscreen lights up and shows the controls and indicators They are very intuitive STBY NORMAL PREAMP FAULT ON AIR There are 4 yellow touch buttons visible on the screen Above the first three buttons from the left side their status should be displayed Touch of a button will change the operation status LED above the status line will lights SETUP touch button is used to set some parameters 0 OM 1002 OPO OH OSS OD V Refl renee mm me eenn er Ww Temp STBY CONTEST PREAMP FAULT ON AIR Contest fan speed is selected OM 1002 P SPOS ODO OS SOS OS OSS He bennen Vv Refl ee eee ee nnw Temp OPERATE NORMAL PREAMP FAULT ON AIR PA is in the operation mode OM 1002 ke zn ctl hod on Te GOSS OHSS O SHELA 05 58 dob HEY Refl A SWR eee w Temp NORMAL PREAMP FAULT ON AIR External preamplifier is ON 5 2 Preparing for use After turning on the power switch on the front panel power amplifier will automatically go into standby mode We recommend to start preparation for operation with SETUP menu Firstly it allows you to set the language then to set some of the basic parameters Possible languages English German Slovak
3. Hungarian and French Setup Menu set Up Display contrast Display delay Touch SETUP on the screen Setup menu is displayed Bias switch Touch LANG Preamplifier delay Bias current 5 3 1 Language selection Language English Deutsch Slovensky Magyar Frangais 5 3 2 Display contrast Display contrast The language selection screen is displayed Touch on the corresponding flag to select language Screen will go automatically back to the Setup Menu Or if you do not want to change language touch BACK Touch CONT from Setup screen Use UP DOWN to set contrast of the touchscreen Then touch SAVE Screen will go automatically back to the Setup Menu Or if you do not want to change contrast touch BACK 5 3 3 Display delay Display delay Display delay Display delay Display will not turns OFF Display turns OFF after 10 sec Display turns OFF after 1 min max 5 3 4 Bias switch Electronic Bias Settings EBS is one of significant feature of the power amplifier It allows to set low drain current abt 300mA after pressing the PTT until RF signal is no present at the input At the moment when RF signal comes to the input of the PA bias will automatically change its value to the higher level abt 2 5A independently on the selected operation mode in the TCVR EBS is default activated To deactivate EBS you have to set Bias switch to OFF such a case bias value immediately after pressing th
4. part inside the amplifier Substitution of parts may void intrinsic safety 6 2 Fuses There are no fuses reachable from outside or from inside of the PA If you turn the power amplifier ON and no LED will be illuminated display stays dark check mains first and then contact your dealer In such a case main power supply failure occurred probably Main power supply is removable from the rear side of the PA There is no necessary to open upper lid WARNING If for some reason you need to open upper lid of the amplifier make sure that power supply has been disconnected Take out power cord from the outlet 6 3 Cleaning To prevent damage to the amplifier surfaces and the plastic components do not use aggressive chemicals for cleaning Do not open the amplifier for cleaning Outer surface may be safely accomplished by using piece of soft cotton cloth moistured with clean water or window cleaner 7 Block diagram Ej OUTPUT PA modul LP filter INPUT board fe 144 MHz SWR meter SUPPLY 50V 36A EJ LAN CONTROL board ispl Supply 12V 2A PNY PREAMP KEY OUT KEY IN Block diagram OM1002 Output relay line command Input relay line command KEY OUT time in ms E Y O N U bo O o a 15ms OUT OUTPUT 15ms OUT In the case if LNA is active PREAMPLIFIER ON Output relay line Input relay line IN OUT command KEY OUT BIAS UN O A U E a
5. section of 4 mm at least Connect your transceiver to the same grounding system of your shack carefully Use minimum length of cables and make sure that the connections are both physically and electrically sound With poor grounding you may risk damaging to your equipment having problems with TVI BCI or your transmitted signal may be distorted 4 2 Coaxial Cable The output of the transceiver is to be connected to the input of the amplifier via RG58 or similar cable For the connection between the power amplifier and the antenna Belden 9913 or similar coaxial cable suited for high power is recommended Both the INPUT and OUTPUT N sockets with Teflon insulation are used 4 3 Control Cable Control cable maintains TX RX switching of the PA TX GND The cable must be shielded On the side of the power amplifier a CINCH socket is used On the side of your transceiver you have to use a socket suitable for this transceiver During transmitting the middle pin is connected to the ground Amplifier uses one coaxial relay for the output It has to be switched earlier than HF is applied cold switching Modern transceivers they have a time delay between PTT switching and power output Sufficiently robust coaxial relay is using for TX RX switching Main Supply CAUTION Be sure you got PA with properly terminated line cable corresponding with your power system s outlet If not contact your dealer In such a case you should m
6. 0 M 1 0 0 2 OM 1002 VHF POWER AMPLIFIER Set Up Display delay SOLID STATE 145 MHz POWER AMPLIFIER User Manual OM POWER s r o 930 30 B 126 E mail om power om power com SLOVAKIA WEB WWW OM POWER COM Thank you for purchasing a new model of the power amplifier for the 2m amateur band Parameters the quality of design and functionality meet the requirements of the market and are the result of our own development This product is covered by 3 years of warranty period We wish you many years trouble free use of this equipment lot of fun and successful connections in the world of amateur radio OM POWER Team TABLE OF CONTENTS 1 GENERAL INFORMATION 1 1 Introduction 1 2 Specification 1 2 1 Parameters 1 2 2 Protection Circuits SAFETY INSTRUCTIONS GENERAL DESCRIPTION 3 1 Front and Rear Panel 3 2 HF Part 3 3 Power Supply 3 4 Safety Devices INSTALLATION 4 1 Grounding 4 2 Coaxial Cable 4 3 Control Cable 4 4 Main Supply 4 5 Cooling OPERATION 5 1 Operation Elements 5 2 Preparing for Use 5 3 Setup Menu 5 3 1 5 3 2 5 3 3 5 3 4 SR RoR 5 3 6 Language selection Display contrast Display delay Bias switch Preamplifier delay Bias current 5 4 Operating Mode MAINTENANCE 6 1 Fault conditions 6 2 Fuses 6 3 Cleaning 7 Block Diagram 8 Timing General Information 1 1 Introduction The OM Power model OM1002 is a single band solid stat
7. ake the necessary changes using a licensed electrician CAUTION Be sure that your power system is correctly wired and properly rated To use adequately sized and connected grounding system is also very important 4 5 Cooling CAUTION The amplifier must be installed in such a way that free flow of hot air from the amplifier is allowed Do not obstruct air intake and exhaust areas of the PA Installed axial fan provides adequate cooling of the amplifier even during long time operation It is automatically activated when PA is switching ON There are two modes of fan speed selectable In the normal mode fan speed is gradually rising with increasing temperature In the contest mode the fan is switched at a constant high speed Fan inside the power supply starts to operate depending on the current drawn by the MOSFET When the amplifier reaches inside temperature of 75 deg Celsius warning appears and fault LED starts blinking At 80 degrees transmitting will be automatically blocked fault LED will light 5 Operation WARNING Before switching PA on make sure that amplifier is grounded antenna or dummy load is connected and power cord is putted to the outlet CAUTION Do not turn PA on for at least 2 hours after unpacking it and moving in its operating location Especially when amplifier was moved from a cold place to a warm one because not visible condensation may develop inside and this could result in damage of the PA
8. ct In a household it can influence other electric appliances In such cases the user is to take proper actions to mitigate this disturbance CAUTION Read this manual carefully Follow all of instructions during installation and operation to avoid damage to the amplifier not covered by manufacturer s warranty Do not attempt to perform any change of hardware or software 3 General description 3 1 Front and Rear Panel OM 1002 VHF POWER AMPLIFIER NORMAI PREAMF FAULT ON AIR STBY m m2 Se A K z Main switch green on the right side and OLED display are visible on the front panel After switch PA ON the display lights up in couple of seconds and shows the controls and indicators RF Output See Note RF Input Grounding Point Mains Plug Power Supply Cooler inside LAN Local Area Network connection for REMOTE CONTROL of PA for future use PREAMP RCA Phono 12V 100mA for an external RX preamplifier switching CAUTION If you are using an older transceiver or transmitters without time delay we recommend to connect the PA in such a way that the transmit receive switch foot switch for example is connected with the KEY IN socket of the amplifier The KEY OUT socket is to be connected with the PTT socket in the transceiver The amplifier is equipped with two safety devices which ensure that the output relay is not switched under power mistakenly hot switching KEYIN RCA Phono Input sig
9. e PTT will be high Bias switch Touch BIAS from the Setup screen Use ON OFF to set bias working condition Then touch BACK Screen will go automatically back to the Setup Menu 5 3 5 Preamplifier delay You can control switching of an external remote RX preamplifier from the PA using PREAMP ON OFF touch button For reliable working condition and safety of preamplifier there is important to set some delay of its switching according to the PTT Possible range is from O to 200ms Default value is 20 ms Preamplifier delay 5 3 6 Bias current Bias1 Current Low Bias1 Current High Set Up Touch PREAM from Setup screen Use UP DOWN to set delay value 0 200ms Then touch SAVE Screen will go automatically back to the Setup Menu Or if you do not want to change delay touch BACK Touch CURR to see both levels of bias current In couple of seconds you will see the values of drain current in the both lines This parameter will be checked without the possibility to change it Use BACK touch button to release checking Fluctuation of values is not a mistake To release the Setup menu touch BACK again Operating mode CAUTION In STBY the amplifier is in bypass mode and your transceiver is directly connected to the antenna Maximum allowed power in bypass mode is 100 Watts Passing RF power is not measured and displayed if PA is either in standby mode or turned OFF Touch the OP STBY button to activate operating mode I
10. e amplifier designed for duty operation on 2 meter s amateur band with all modes and no time limit It is equipped with a new Freescale high rugged N channel double MOSFET This amplifier is characterized by compact design small size and a low weight 1 2 Specification 1 2 1 Parameters Frequency Coverage 144 148 MHz Amateur Band Power Output 1000W in CW 800W in SSB linearity RTTY AM FM and digi modes 50 duty cycle Input Power 10 to 15 W for full output power 1000W Input Impedance 50 Ohm VSWR lt 1 3 1 Power Gain Output impedance Maximum output SWR SWR protection Intermodulation distortion Suppression of harmonics MOSFET Cooler Supplying Power Supplies inside Typically 19 dB 50 Ohm unbalanced 1 9 1 for full output power 1000W Automatic switching to STBY when reflected power is 100W or higher 32 dBc lt 70 dBc MRFE6VP61K25HR6 1 axial fan cooler 1 axial fan power supply 100 250VAC 50 60 Hz 50V DC switching mode PS 12V DC for logic and protection circuits 318 mm x 144 mm x 362 mm 12 5 x 5 7 x 14 3 Width x height x depth 9 5 kg 20 9 Ib 1 2 2 Protection Circuits There is several special protection circuits used in the amplifier They are activated when one or more of next parameters exceed defined values or some unwanted occasion occurs Output power too high Reflected power too high Drain current too high VSWR too high DC voltag
11. e too low or DC voltage error Input power too high hardware protection amp software protection Inside temperature too high Soft start for power supply protection PS feature 2 Safety Instructions WARNING Before you will start to install and operate power amplifier read carefully next safety instructions WARNING AVOID CHILDREN to play around PA or to touch power amplifier or connected cables in working condition or to push anything into the holes WARNING Never turn the amplifier on without the upper lid in place WARNING The OM1002 amplifier is neither to be used in a WET or HUMID environment nor to be exposed to RAINFALL WARNING Do not turn the amplifier on without having connected the ANTENNA or properly rated DUMMY LOAD A hazardous HF voltage may build up on the antenna connector after turning the amplifier on with no antenna or dummy load connected WARNING Before opening the upper lid of the amplifier make sure that power supply has been disconnected Take out power cord from the outlet CAUTION The amplifier must be installed in such a way that free flow of hot air from inside is allowed The amplifier must not be installed in a constrained surrounding i e tight shelves etc CAUTION The amplifier must be properly grounded during operation CAUTION During operation the amplifier must be installed in such a way that the rear panel will stay accessible CAUTION The amplifier is an A category produ
12. ftware will block transmitting PA will stay in OPER mode Second and very fast protection will be activated when the input power exceeds 50 above full driving level In this moment input RF signal will be switched immediately to the dummy load and PA will go to STBY mode Message Pin appears Decrease the input power under maximum driving level and press RESET to resume transmitting possibility a In the case of the main power supply failure or when voltage drops below 42 volts fault message Voltage appears transmitting will be blocked We recommend to switch PA immediately OFF in such a case You have to contact manufacturer or your dealer for assistance When the amplifier reaches inside temperature of 75 deg Celsius warning message Temp appears on the display Fault LED starts blinking At 80 degrees protection circuit will automatically block transmitting fault condition You have to decrease the power or wait couple of minutes to be ready transmitting again Touch RESET If current of the PA exceeds the limit value Current fault message appears on the display transmitting will be blocked Decrease input power first touch RESET and try to transmit again If this will not help and current will stay high contact the manufacturer for assistance CAUTION If MOSFET is destroyed do NOT attempt to replace it in any case Contact the manufacturer immediately WARNING Never try to change or move any
13. more is reachable NOTE We recommend using the maximum output power of 800 watts to maintain good linearity of output signal in SSB or AM mode CAUTION Check the temperature of PA during digi modes operation Decrease the output power when warning Temp under the FAULT LED appears Output power of about 800 watts should be ok for 50 of duty cycle OM 1002 k A hh h h am V Refl HERDER ER Ener ennen remmer w Temp NORMAL PREAMP FAULT ON AIR OM 1002 V A SWR Ww Temp OPERATE NORMAL PREAMP FAULT ON AIR If something happened with PA loading for example protection circuit detects increasing of VSWR reflected power If this parameter exceed the limit value fault condition appears and PA will be immediately blocked Top picture shows such a situation Fault LED is ON transmitting is blocking Under FAULT LED exceeded parameter is visible Refl reflected power Touch RESET to reset fault status and return PA to the operation mode Press PTT again to be able to transmit Bottom picture shows the cause of this fault status Reflected power exceeded 100W limit value Also VSWR exceeded the limit 1 9 1 This picture is visible on the display only very short time after fault condition appears Maintenance 6 1 Fault conditions If a fault condition appears during the operation of the amplifier the safety circuits of OM1002 will react the FAULT LED lights There are
14. n the OPERATE mode you can select fan speed switching an external RX preamplifier ON or OFF but it is not possible to go to the Setup menu WARNING Before you push PTT for the first time set the RF power in your TCVRr to the minimum from 3 to 5 watts Set OPERATE mode type of operation and press PTT You can check measured parameters of PA V A SWR Ww Temp OPERATE NORMAL PREAMP FAULT ON AIR Picture shows input power of 4 7 W output power 516 W Power gain from input to output of the PA is 20 4 dB You can also read other important parameters on the display MOSFET voltage MOSFET current reflected power SWR and temperature Depending on the reflected power you can consider quality of your antenna impedance matching OM 1002 V Refl WIN With only 0 4 W of the input power you can reach more A SWR Ii than 100W at the output Ww Temp C a8 Power gain is 24 1 dB OPERATE NORMAL ON AIR PREAMP FAULT OM 1002 V Another example shows picture with 1 8 W of the input power In this case power gain is 21 6 dB w Temp ec El ON AIR With 1 8W of the input power you can get more than OPERATE NORMAL PREAMP FAULT 260W of the power output If all looks ok you can increase RF power from the transceiver slowly and check important parameters of the PA Do not exceed the output power of 1000 watts in CW operation mode and about 800 watts in SSB AM FM and digi operation mode even if
15. nal PTT switching voltage current 5V 2 mA KEY OUT RCA Phono Output signal PTT maximum switching of 50V 100mA Note Option Two SMA connectors for distribution of transmitter and receiver path with local RX preamplifier connection possibility Internal circuit ensure cold switching 3 2 HF part OM1002 power amplifier was designed to achieve the RF performance of the MOSFET when applied to the 144 148 MHz frequency band Design was tuned for performance at 1000W CW output 50VDC It consists of no tune distributed element matching circuits designed to be as small as possible For operating it is important that adequate heat sinking was provided in the design RF board is the most important part of the PA Freescale MOSFET is in use The coaxial transformer turns ratio was chosen to meet required impedance level and the length of the coax was tuned to achieve maximum efficiency and maximum power transfer between the device and its load impedance Low Pass Filter is installed behind the amplifier to attenuate harmonics 3 3 Power Supply The amplifier uses two power supplies A professional switching mode power supply 50V 50A for power amplifier and small 12V power supply for logic and protection circuits a Main power supply contains special soft start circuits uses its own fan which is visible from the rear side of the PA It has its own overloading protection and logic to control fan speed P
16. ower amplifier should be connected to any external source of AC in the range from 100 VAC to 277 VAC from 45 to 60 Hz It can be powered by a portable generator for example Small Power Supply for logic and protection circuits This PS is using for an external preamplifier too Current consumption of external preamplifier is limited to 100mA It is powered from the main power supply 3 4 Safety Devices Control and monitoring circuits ensure control and safety during malfunctions of the PA These are on the Control board and the Protection board Control board is located behind the front panel Protection board is visible on the right hand side of PA close to the input output relay Protection board with Input circuits Input RF attenuator 6 dB is visible in the picture Some of protection circuits are installed on the Control board behind the front panel too 4 Installation NOTE Read this chapter carefully prior starting with installation Before unpacking inspect shipping carton first if it is not damaged Keep all of packing parts for possible future shipment Check unpacked power amplifier If you find some damaging contact your dealer immediately to keep full warranty During installation go step by step according to next parts 4 1 Grounding CAUTION The amplifier has to be grounded properly Connect the screw on the rear panel of the amplifier to your local grounding system with a copper cable use a cross
17. several fault or warning messages possible to appear on the display under the fault LED in abbreviated form when some of the protection will be activated To view fault history with full text of the faults touch FAULT from Setup Menu The OM1002 power amplifier will respond to these conditions High Output Power FWD High Reflected Power Refl High Input Power Pin Different Current Error Diff for 2 kW version only Low Supply Voltage Voltage PA too Hot Temp High Supply Current Current Overdrive Error Overd SWR too High SWR 1 2 3 4 5 6 7 8 J If the output power of the PA exceeds the limit value FWD fault message appears on the display transmitting will be blocked Fault LED will lights To be able to transmit again you have to remove the cause of the error decrease the input power Touch RESET for going back to the operation mode When reflected power of the PA exceeds 100 watts Refl fault message appears on the display transmitting will be blocked Fault LED will lights In such a case try to decrease input power first or improve matching and adapt better the impedance of your antenna Touch RESET for going back to the operation mode When the input power of the PA exceeds limit value Pin fault message appears on the display transmitting will be blocked Decrease the input power There are two limit values First 20 above full driving level is for software protection In this case so
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