here - ELVA-1
Contents
1. e In the case setting of Power Level the grid is defined in percents of voltage applied to Control Electrode of BWO tube In Supplement 5 dependencies of output power versus frequency for different voltage applied to control electrode in percents are presented Control Unit indicates Output Power also in percents of control voltage applied not in percents of real output power 9 2 2 Set External Power control mode One should check LED External on the button Frequency Control 19 If LED glows it means that the device is installed in External Frequency mode If LED doesn t glow one press button Frequency Control to switch on LED on the button 19 In this mode an external positive voltage 0 10 VDC controls output power of Generator Feed the positive 0 410 VDC voltage into the plug Input 18 External Power Control The higher voltage corresponds to the higher output power 9 3 Amplitude Modulation There three mode CW AM OFF Internal External One should check LED on Amplitude Modulation group of buttons 16 If LED glows it means that the device is installed in indicated mode 9 3 1 Set CW mode Amplitude Modulation is OFF Press button OFF in Amplitude Modulation group of buttons 16 9 3 2 Set Internal Modulation Mode Press button Internal in Amplitude Modulation group of buttons 16 and square wave 100 amplitude modulation with frequency2. Block diagram of the control unit 19 SGMW xxx Millimetre Wave Oscillator User Manual SUPPLEMENT 5 Plot 1 Dependence of Output Power versus frequency by various Power Levels for U band BWO ELVA 1 200 Output Power vs Frequency 37 38 39 40 41 42 43 T T N fyr is 9 i s Frequency GHz t 19 Q obo WwW N is o Q bo N o o r A o oO The structure of the calibration data The data in the calibration files are placed in ten columns divided by the tabs 190 180 170 Power Level 160 150 140 z 130 100 120 110 100 a 5 90 75 2 80 6 70 60 50 40 50 30 20 10 35 0 Uinp HVm P35 F35 P50 F50 P75 F75 P100 F100 2 6 1 88 22 2 38 096 28 3 38 008 40 8 37 863 53 2 37 724 2 605 1 885 22 2 38 1 28 3 38 017 40 8 37 873 53 2 37 739 The first column Uinp is a control voltage in V applying to the external broadband frequency input 10 see supplement 1 The second column HVm is a voltage in V measured on the HV Monitor output plug 27 see supplement 2 corresponding to the data placed in the first column The third column P35 is measured output power of Generator in mW at 35 power level corresponding to the data placed in the first column The forth column F35 is a Generator frequency in
3. Name_F3_F2_Fi_F4 PowerLevel_SweepTime_Sweeptype_HVmonitor _lheat_lanode_Ug_ Ugrid_ Condition The Status String dimension is variable and depends on the current status of the Generator The Name string occupies first six bytes from 1st to 4th For the Generator this string is fixed Name SGMW The Condition occupies 4 bytes Correspondence between values of each Condition bit and the Generator settings are shown in the next table Regime Position Power Internal Control 1 Power External Control 1 Amplitude modulation External 2 Amplitude modulation Internal 2 Amplitude modulation OFF 2 Frequency Internal Control 3 Frequency External Control 3 Sweep OFF 4 Sweep ON 4 15 SGMW xxx Millimetre Wave Oscillator User Manual ELVA 1 SUPPLEMENT 1 Front panel of the Generator Disposition of the plugs and knobs on the front panel of the power supply 1 Power switch 2 Reset button 3 Liquid Crystal Display 4 Step knobs 5 Tuning knob 6 Power indicator 7 Ready indicator 8 Control Indicators 9 Digital keyboard 10 AM Strobe output output plug TTL BNC connector 11 FM Strobe output output plug TTL BNC connector 12 HV monitor output output plug 0 10V BNC connector 13 Frequency Control external frequency control switch 14 Freq input external frequency control input BNC c
4. 1 100 kHz is provided to output Use Strobe Signal output plug 11 for the triggering of external devices e Turn on the Generator as directed in par 8 e To enter desired value of frequency modulation to press button Menu 15 to activate the Main Menu Using buttons Step lt or gt 4 or Rotate Tuning Knob 5 to install marker opposite point 3 AM kHz of Main Menu and press key Enter on keyboard 9 for put in the setting regime of Output Power One can press key 3 to active of this regime directly After activate Internal AM mode to enter the desired AM frequency one has three possibilities e Rotate Tuning Knob 5 and then press key Menu 15 AM frequency changes synchronously with value indicated on the display 12 SGMW xxx Millimetre Wave Oscillator User Manual ELVA 1 66 e Press buttons Step lt or gt 4 and then press key Menu 15 This way is useful if it is necessary to provide precision tuning One button realising leads to the change of the AM frequency on the smallest available step AM frequency changes synchronously with value indicated on the display e Enter AM frequency from Digital Keyboard 9 A marker will appear on the display just after the realising of one of the keys 9 One can use buttons Step lt or gt 4 to change the marker position That allows edit the AM frequency on the di
5. BWO Output Power vs Frequency 150 be ig 1 NA 120 M N E i iuam EAHA E ra ll h l Power Level o ANa A IS Y ST JNNA l AP AMI A Y 100 3 60 pos ly ALL 3 h Yoy J f A oO 50 a i y WY 75 40 177 ay a M he AA T TTT A T ALA AN 50 Ly Ne eae olen 4 vF AMTT cnn one Merete oe Sr Fr rf Tr TFT Tr er er Kr Kr Kr Kr Tr Kr Or Or OT OT OO CT lc TCC ClUcr KCChCUch KChUm Se Frequency GHz The structure of the calibration data The data in the calibration files are placed in ten columns divided by the tabs Uinp HVm P40 F40 P50 F50 P75 F75 P100 F100 2 3 2 560 9 8 88 095 14 9 87 935 38 1 87 522 66 4 87 384 2 305 2 565 9 8 88 142 15 87 973 38 87 58 66 4 87 419 e The first column Uinp is a control voltage in V applying to the external broadband frequency input 10 see supplement 1 e The second column HVm is a voltage in V measured on the HV Monitor output plug 27 see supplement 2 corresponding to the data placed in the first column e The third column P40 is measured output power of Generator in mW at 40 power level corresponding to the data placed in the first column e The forth column F40 is a Generator frequency in GHz at 40 power level corresponding to the d
6. External Power Control mode is switched on In External Power Control mode 0 10VDC control voltage should be applied to the corresponding socket Power Control 18 for a remote electrical manipulation of output BWO s power In Internal Power Control mode the power is controlled by microcomputer using DAC Buttons Amplitude Modulation 16 switch on different modes of amplitude modulation CW OFF button Internal 1 100 kHz Amplitude Modulation Internal button Amplitude Modulation with External Triggering External button TTL signal from an external pulse generator should be applied to corresponding plug 17 for the triggering of External Amplitude Modulation mode PLL Input 20 On the rear panel of generator the following controls are installed see Supplement 2 Keyboard connector for external keyboard 21 SVGA connector for external PC monitor 22 COM RS 232 port 23 GPIB for connecting the Generator to GPIB bus 24 Ground socked 25 Power Plug AC 220V with fuse 3A 26 Fan 27 HV connector to BWO module 28 Disposition of controls of BWO module is presented in Supplement 3 Power indicator 29 RF output 30 Time operating counter 31 HV connector to power supply 32 Cooling fan 33 BWO is a heart of the Generator Electrical Scheme of BWO is presented in Supplement 7 The Generator is functioning properly if the following con
7. Menu and press key Enter on keyboard 9 for put in the setting regime of frequency One can press key 1 to active of this line directly To enter the desired frequency one has three possibilities e Rotate Tuning Knob 5 and then press key Menu 13 Output operation frequency changes synchronously with value indicated on the display SGMW xxx Millimetre Wave Oscillator User Manual ELVA 1 e Press buttons Step lt or gt 4 and then press key Menu 15 This way is useful if it is necessary to provide precision tuning One button realising leads to the change of the frequency on the set frequency step determined by Fr step menu Output operation frequency changes synchronously with value indicated on the display e Enter frequency from Digital Keyboard 9 A marker will appear on the display just after the realising of one of the keys 9 One can use buttons Step lt or gt 4 to change the marker position That allows edit the frequency on the display Press key Enter to finish editing and change the output operation frequency If one will try to enter a wrong frequency out of operating frequency range max or min one available will be installed correspondingly e One can combine these three cases B Frequency sweep mode In this mode Generator provides frequency sweep from the initial frequency to final one User would program both frequencies po
8. Oscillator User Manual ELVA 1 9 1 2 Set External Frequency control mode In this mode an external positive voltage controls output frequency of Generator One should be very careful and applies voltage according calibration table if do not allow this table one can break BWO tube BWO Module External Control Voltage 33 50 GHz 50 75 GHz 75 110 GHz 110 170 GHz 1 05 7 9 V One should check LED External on the button Frequency Control 13 If LED glows it means that the device is installed in External Frequency mode If LED doesn t glow one press button Frequency Control to switch on LED on the button 13 In this mode an external positive voltage controls output frequency of Generator Feed the positive see table voltage into the plug Input 14 External Frequency Control The applied voltage corresponds to output frequency according to calibration table see Supplement 6 9 2 Power control There are two modes of Power control Internal and External Power Control modes Turn on the Generator as directed in part 8 9 2 1 Set Internal Power control mode One should check LED External on the button Power Control 18 If LED doesn t glow it means that the device is installed in Internal Frequency Control mode If LED glows one should press button Frequency Control to switch off LED on the button 18 e To enter desired
9. Voltage V 0 10 3 16 External Frequency Control Voltage see calibration files 3 17 Operating modes CW Remote frequency and power regulation by an analogue voltage frequency and power regulation from front panel and GPIB interface 3 18 Electrical resistance between primary power line and the cabinet is no less than 100 MOhm at high humidity no less than 3 MOhm at high temperature no less than 5 MOhm 3 19 All parameters mentioned above are valid after 30 min warming up period 3 20 Power consumption is no more than 400 VA 4 RELIABILITY 4 1 Main time to failure for power supply no less than 2000 h 4 2 90 life time for BWO tube no less than 500 h 5 CONSTRUCTIVE PARAMETERS 5 1 Dimensions of the generator 490x240x270 mm 5 2 Dimensions of BWO Module 190x150x200 mm 5 3 Weight of power supply no more than 25 kg 5 4 Weight of BWO Module no more than 4 kg SGMW xxx Millimetre Wave Oscillator User Manual ELVA 1 6 PRINCIPLE OF OPERATION Generator consists of the power supply and BWO module BWO module is made up of BWO witch is placed into protection box with high voltage connector and cooling fans The power supply is based on PC microcomputer It is used together with digital to analogue converter as internal voltage control oscillator for digital remote control of generator from front panel or by means GPIB bus Power supply unit includes the following parts Controlled high voltage sou
10. corresponding to the data placed in the first column e The sixth column F50 is a Generator frequency in GHz at 50 power level corresponding to the data placed in the first columns e The seventh and eighth columns P75 and F75 correspond output power and frequency at 75 power level corresponding to the data placed in the first columns e The ninth and tenth columns P100 and F100 correspond output power and frequency at 100 power level corresponding to the data placed in the first columns SGMW xxx Millimetre Wave Oscillator 24 Power Level 100 75 50 33 User Manual ELVA 1 SUPPLEMENT 10 Plot 8 Dependence of voltage on the HV monitor output versus frequency at maximum level of output power Frequency GHz Frequency vs output voltage of High Voltage Monitor at 100 Power Level 115 110 105 100 95 90 85 80 75 70 2 5 3 0 3 5 4 0 High Voltage Monitor V 4 5 Plot 9 Dependence of frequency versus control voltage applied to the external broadband frequency tune input 10 at maximum level of output power Frequency GHz Frequency vs Input Control Voltage 115 110 105 100 95 90 85 80 75 70 5 6 7 Input Control Voltage V SGMW xxx Millimetre Wave Oscillator User Manual ELVA 1 SUPPLEMENT 11 Plot 10 Dependence of Output Power versus frequency by various Power levels for F band
11. is measured output power of Generator in mW at 50 power level corresponding to the data placed in the first column e The sixth column F50 is a Generator frequency in GHz at 50 power level corresponding to the data placed in the first columns e The seventh and eighth columns P75 and F75 correspond output power and frequency at 75 power level corresponding to the data placed in the first columns e The ninth and tenth columns P100 and F100 correspond output power and frequency at 100 power level corresponding to the data placed in the first columns SGMW xxx Millimetre Wave Oscillator 28 User Manual ELVA 1 SUPPLEMENT 14 Plot 1 Dependence of voltage on the HV monitor output versus frequency at maximum level of output power for D band BWO Frequency vs output voltage of High Voltage Monitor at 100 Power Level 180 170 n 160 I 150 ray c 140 S 130 2 u 120 110 100 2 3 4 5 6 7 8 9 10 High Voltage Monitor V Plot 2 Dependence of frequency versus control voltage applied to the external broadband frequency tune input 10 at maximum level of output power Frequency vs Input Control Voltage 180 170 160 150 140 130 120 110 100 Frequency GHz N 3 4 5 6 7 8 Input Control Voltage V 29 SGMW xxx Millimetre Wave Oscillator User Manual ELVA 1 SUPPLEMENT 15 Electrical Schem
12. value of Output Power to press button Menu 15 to activate the Main Menu Using buttons Step lt or gt 4 or Rotate Tuning Knob 5 to install marker opposite point 2 Power of Main Menu and press key Enter on keyboard 9 for put in the setting regime of Output Power One can press key 2 to active of this regime directly To enter the desired Output Power one has three possibilities e Rotate Tuning Knob 5 and then press key Menu 15 Output Power changes synchronously with value indicated on the display e Press buttons Step lt or gt 4 and then press key Menu 15 This way is useful if it is necessary to provide precision tuning One button realising leads to the change of the frequency on the smallest available step Output Power changes synchronously with value indicated on the display e Enter Output Power from Digital Keyboard 9 A marker will appear on the display just after the realising of one of the keys 9 One can use buttons Step lt or gt 4 to change the marker position That allows edit the power on the display Press key Enter to finish editing and change the 11 SGMW xxx Millimetre Wave Oscillator User Manual ELVA 1 output power If one will try to enter a wrong power out of 0 100 range max or min one available will be installed correspondingly e One can combine these three cases
13. 2 Liquid Crystal Display for indication of various regimes of Generator 3 Two buttons for fine setting of frequency or power 4 Tuning knob for frequency and power setting 5 Indication READY 7 Control indicators 8 5V and 12V signal that DC 5V and 12V are presented Red indicators provide condition of protection circuits If one of them is glow it means this protection circuit comes into action Digital Keyboard 9 e AM Strobe output output plug TTL 10 synchronised with Internal AM mode e FM Strobe output output plug TTL 11 synchronised with Internal frequency sweep e HV monitor output output plug 0 410V 12 corresponds to HV deceleration voltage 0 3000V e Button Frequency Control 13 switches External or Internal Frequency Control modes If LED on the button is glow it means that External Frequency SGMW xxx Millimetre Wave Oscillator User Manual ELVA 1 Control mode is switched on In External Frequency Control mode positive control voltage see 91 2 should be applied to the corresponding socket Input 14 for a remote electrical manipulation of output BWO s frequency In Internal Frequency Control mode the frequency is controlled by microcomputer using DAC Button Menu 15 calls operation menu to LCD 3 Button Power Control 19 switches External or Internal Power Control modes If LED on the button is glow it means that
14. GHz at 35 power level corresponding to the data placed in the first columns The fifth column P50 is measured output power of Generator in mW at 50 power level corresponding to the data placed in the first column The sixth column F50 is a Generator frequency in GHz at 50 power level corresponding to the data placed in the first columns The seventh and eighth columns P75 and F75 correspond output power and frequency at 75 power level corresponding to the data placed in the first columns The ninth and tenth columns P100 and F100 correspond output power and frequency at 100 power level corresponding to the data placed in the first columns 20 SGMW xxx Millimetre Wave Oscillator User Manual ELVA 1 SUPPLEMENT 6 Plot 2 Dependence of voltage on the HV monitor output versus frequency at maximum level of output power Frequency vs output voltage of High Voltage Monitor at 100 Power Level Frequency GHz A 2 3 4 5 6 7 High Voltage Monitor V Plot 3 Dependence of frequency versus control voltage applied to the external broadband frequency tune input 10 at maximum level of output power Frequency vs Input Control Voltage 62 60 58 56 54 52 50 48 46 44 42 40 38 36 Frequency GHz 2 3 4 5 6 7 8 9 Input Control Voltage V 21 SGMW xxx Millimetre Wave Oscillator Use
15. User Manual ELVA 1 FE FIVA www elva 1 com E mail sales elya 1 com SGMW xxx Millimetre Wave Oscillator With external BWO Modules Operation manual 3rd edition 09 2012 SGMW xxx Millimetre Wave Oscillator User Manual ELVA 1 SGMW xxx Millimeter Wave Generator With external BWO Modules User Manual Contains 1 GENERAL REMARKS occa acossincasrondeduansoaasans ouvas sansnancnsnnntad sevnananspinendnansi uadizenndadsunenundea 3 ZEXPLOITATION viderant ie e ee ne a tion Ea E E E a esas ai 3 3 PARAMETERS ceense aese aosa anaa AE eaea ESAE EKES EKESTO ei E SES 3 4 RELIABILITY cacsadewacn eaten n a na amber a 4 5 CONSTRUCTIVE PARAMETERS sissnciscsnssnaducasnainsasvonnadisonnensanssssad cansalgnsansonses tenansaie 4 6 PRINCIPLE OF OPERATION eseeeseesisererrsrsresrsrsreresrsrerisrsreestsreresrsreeesreresese 5 7 OPERATION MANUAL oe scssssneisndasinacd penonaadlsansina aca sntactaponnadneonneacsapuntadiansnleasannonsed iarsna 8 8 HOW TO TURN ON THE GENERATOR 00o eee eeeceeeeeeeeeseeeeeeeeneens 8 9 PURSUANCE OF MEASUREMENTS 00 0 cescsecseeseeseeeeseeeeaeesesaeeneeeneneees 9 10 GPIB INTERFACE ieeiisieriiesiiinn isete etss ronseis tie etaim eeaeee 13 SUPPLEMENTS esrara n ned EEA SAT E A EAE EREE EE E ERES 15 1 Front panel of the Generator eseeseeesseseesresresreesessrrerersrrsresrtesresissrestenressresrersresresees 15 2 Rear panel of the Generator sistsscccecascacatedsecessc vaycolaasicceusaiavedcad
16. a placed in the first column The sixth column F50 is a Generator frequency in GHz at 50 power level corresponding to the data placed in the first columns The seventh and eighth columns P75 and F75 correspond output power and frequency at 75 power level corresponding to the data placed in the first columns The ninth and tenth columns P100 and F100 correspond output power and frequency at 100 power level corresponding to the data placed in the first columns 22 SGMW xxx Millimetre Wave Oscillator Power Level 100 15 50 25 User Manual ELVA 1 SUPPLEMENT 8 Plot 5 Dependence of voltage on the HV monitor output versus frequency at maximum level of output power for V band BWO Frequency GHz Frequency vs output voltage of High Voltage Monitor at 100 Power Level oa g N N AN High 9 Nt 2 on N Oo nyy Oo ovyo F F 4 4 2 N Voltage Monitor V Plot 6 Dependence of frequency versus control voltage applied to the external broadband frequency tune input 10 at maximum level of output power Frequency GHz Frequency vs Input Control Voltage 1 2 Q o NA t r N N N N Input Control Voltage V oO vt o ym o a ao oo SGMW xxx Millimetre Wave Oscillator 23 User Manual ELVA 1 SUPPLEMENT 9 Pl
17. ata placed in the first columns e The fifth column P50 is measured output power of Generator in mW at 50 power level corresponding to the data placed in the first column e The sixth column F50 is a Generator frequency in GHz at 50 power level corresponding to the data placed in the first columns e The seventh and eighth columns P75 and F75 correspond output power and frequency at 75 power level corresponding to the data placed in the first columns e The ninth and tenth columns P100 and F100 correspond output power and frequency at 100 power level corresponding to the data placed in the first columns 26 SGMW xxx Millimetre Wave Oscillator User Manual ELVA 1 SUPPLEMENT 12 Plot 11 Dependence of voltage on the HV monitor output versus frequency at maximum level of output power Frequency vs output voltage of High Voltage Monitor at 100 Power Level 150 i A eo So N Frequency GHz 100 90 80 3 4 5 6 7 8 9 10 High Voltage Monitor V Plot 12 Dependence of frequency versus control voltage applied to the external broadband frequency tune input 10 at maximum level of output power Frequency vs Input Control Voltage 150 140 i o o 120 Frequency GHz 5 100 90 80 3 4 5 6 7 8 9 Input Control Voltage V 27 SGMW xxx Millimetre Wave Osc
18. connected with other electrical devices the potentials of Generator and other devices must be equalised before the power is turned on Mentioned actions are not needed if you sure that the device is grounded in primary power plug It is prohibited to turn on the Generator unless a waveguide with a load is attached to the output waveguide of the Generator 8 HOW TO TURN ON THE GENERATOR Install BWO Module Connect BWO Module 32 with power supply 28 by supplied special cable Ground the Generator Ensure that fuses are present Attach a load to the output of BWO Turn on the power The Power ON indicator 6 must glow and in approximately 20s READY indicator 7 must glow as well On LCD 3 a current time will be indicated and after about 4s the main menu will be activated All settings are stored automatically in flash memory of microcomputer Generator loads automatically last settings after switch on or restart Every time the 10 power level will be installed after the tuning on the Generator to avoid possible problems with high power output User should to install the higher power level if it is needed in the experiment Warm up time is approximately 30 min All BWO Modules have electronic key witch allows the generator to detect what BWO is installed After switching on the generator recognises type of BWO automatically and uses corresponded base file frequen_x dat for operation SGMW x
19. cuitry and power supplies required to provide the operation of BWO PC compatible microcomputer integrated into the device provides operating control of the system The sweeper self tests at turn on BWO tube is fully protected against improper voltage connections High voltage monitor is built in There is input for control of frequency by means of an external voltage Phase locking possibility is provided One power supply can be used with different BWO Frequency range is determined by BWO Modules Device has a reserve more then 1 at the edges of the range Specification of BWO modules is presented in Table No 1 Table No 1 MODEL NUMBER BWO Q BWO U BWO W BWO F BWO D Frequency Range GHz 37 54 40 60 75 110 90 140 110 170 Output waveguide size mm 5 69x2 84 4 8x2 4 2 54x1 2 2 03x1 0 1 7x0 83 WR22 WRI9 WRI5 WR12 7WR10 2WR8 WR6 Wavequide Flange UG UG UG UG UG 383 U__ 383 U M 385 U 387 U__ 387 U M 387 U M 387 U M Minimum CW power mW 50 100 25 35 25 80 80 Typical peak power mW 150 200 90 110 80 3 2 Full one band sweep time less then 200 microseconds with external frequency control 10 milliseconds with internal frequency control 3 3 Admissible variation of the frequency of unmodulated oscillation if primary power voltage changes up to 10 for AC 50Hz is no more than 0 05 SGMW xxx Millimetre Wave Oscillator User Manual ELVA 1 3 4 Relative variation of freque
20. d 9 to active Additional Menu On LCD screen appears information about operating current and voltage for BWO tube and generator 10 GPIB INTERFACE 10 1 Set device address on GPIB bus GPIB interface card integrated into Controller is initialised automatically in device slave mode One can set Generator s address on GPIB bus from 01 till 20 Generator saves GPIB address in flash memory and installs it automatically after restart Set new GPIB address for example 12 assuming that present address is 19 Press button Menu to activate Main menu of GPIB address setting Press key 4 and then press keys 1 2 to enter new address 12 After press Enter new address will be installed If one would like to install address 1 he should enter 0 1 in series 10 2 GPIB commands All commands and settings would be controlled through GPIB interface Connect the generator to GPIB bus plug 24 on the rear panel using special cable Turn on the generator as directed in chap 9 par To control of Generator one should send ASCII symbols corresponded to the following table AM Frequency Internal Frequency Control External Frequency Control 14 SGMW xxx Millimetre Wave Oscillator User Manual ELVA 1 Internal Power Control PAP Ae Ai Ao R_0 or R_1 S symbol is blank The current the Generator settings may be read via GPIB bus in form of Status String
21. de see Supplement 4 Fixed DC voltage in fixed frequency mode There are two possibilities of the Control unit programming Manual control using front panel controls Remote control using GPIB bus Built in microcomputer serves an indication of Initial and Final frequencies on the LCD display 3 The computer calculates corresponding frequency from the code of DAC that serves frequency control using a base files frequen_x dat This file contains 4096 lines Each line presents frequency at maximum output power corresponding digital to analogue converter code from 0 till 4095 At smaller output power the operation frequency is shifted a bit from the position corresponded to the maximum output power Frequency shift between values at maximal and minimal power is about 1 GHz Frequency shift is calculated by formula and used by microcomputer for indication of actual frequency For example initial and final frequencies of the sweep indicated on LCD are calculated this way Operating regime of the Generator is defined by BWO control electrode voltage grid In the CW regime this voltage is constant In the Internal or External Amplitude Modulation regimes this voltage is also symmetric rectangular pulse sequence with amplitude equal to the constant voltage in CW regime In the External Power Control regime the voltage is user defined In all regimes voltage applied to BWO control electrode must not exceed 237V The operating regime of
22. ditions are met e When turning on the power the current spikes must be restricted e BWO control electrode voltage should appear if only deceleration voltage is present and must be switched off in the opposite case e BWO control electrode voltage must not be higher than 237V SGMW xxx Millimetre Wave Oscillator User Manual ELVA 1 BWO is a source of UHF oscillations which a voltage of the decelerating system Cathode Voltage controls frequency and output power is controlled by a voltage applied to the control electrode BWO is connected in a grounded anode circuit In this case the output waveguide of the BWO as well as its cabinet is grounded Setting the proper voltage on the BWO decelerating system provides the setting of the Generator s frequency For this purpose the circuit is used which consists of the next parts e commutator e control unit e controlled high voltage source e BWO decelerating system Commutator provides a connection between control input of the High voltage power supply and external broadband frequency tune input 14 if External Frequency Control 13 is switched on Commutator provides a connection between control input of the High voltage power supply and control unit output if External Frequency Control 13 is switched off Control unit provides Linear control voltage with different full band Sweep Times from 0 01 to 99 99 sec with step 0 01 sec in sweep frequency mo
23. e of BWO Tube Uheater Cathode Ucontrol RF output Decelerate Voltage Grounded Anode Ucathode 500 3000VDC Decelerate Voltage Ucontrol 5 230VDC from cathode level Uheating 1 0 1 2VDC from cathode level 30 SGMW xxx Millimetre Wave Oscillator
24. illator User Manual ELVA 1 SUPPLEMENT 13 Plot 1 Dependence of Output Power versus frequency by various Power Levels for D band BWO Output Power vs Frequency Power Level 130 0 120 0 110 0 Wahi at A 100 0 100 90 0 y 9 E 80 0 3 oo ADNANA amp 60 0 ARMA A A 75 2 50 0 rd O 40 0 30 0 200 AAA TAO 50 10 0 Gigabeat al ed aaaea A a 350 105 110 115 120 125 130 135 140 145 150 155 160 165 170 175 Frequency GHz The structure of the calibration data The data in the calibration files are placed in ten columns divided by the tabs Uinp HVm P35 F35 P50 F50 P75 F75 P100 F100 1 050 2 773 13 2 107 894 21 2 107 604 32 8 107 367 38 8 107 165 1 055 2 778 13 3 107 951 21 2 107 772 331 107 388 38 8 107 174 e The first column Uinp is a control voltage in V applying to the external broadband frequency input 14 see supplement 1 e The second column HVm is a voltage in V measured on the HV Monitor output plug 12 see supplement 1 corresponding to the data placed in first column the e The third column P35 is measured output power of Generator in mW at 35 power level corresponding to the data placed in the first column e The forth column F35 is a Generator frequency in GHz at 35 power level corresponding to the data placed in the first columns e The fifth column P50
25. ncy of the output signal is no more than 10 4 if the load VSWR changes from 1 1 to 1 3 at the output power 1mW Output power should be installed using an external attenuator 3 5 Limit of instability of the frequency of unmodulated oscillations at the unchanged primary power voltage during any 15 min of work is 0 01 the warm up time after adjustment from one frequency to another must be no less than 5 min 3 6 50 Hz deviation of the frequency of the CW output signal is no more than 0 002 in the mode with the frequency control by means of an external voltage 3 7 Guaranteed power level of unmodulated oscillations at the load VSWR no larger than 1 3 within see Table No1 3 8 The limit of instability of the output power level of unmodulated oscillation at the unchanged environment and primary power voltage during any 15 min of work is 0 3dB the warm up time after adjustment from one frequency to another must be no less than 5 min 3 9 Admissible variation of output power level of unmodulated oscillation at slow 10 variation of primary power voltage for AC 50Hz is no more than 0 5dB 3 10 50 Hz AM level of output CW signal is no larger than 1 3 11 VSWR of output of the Generator is no more than 1 5 1 at the 1 mW output power 3 12 Output waveguide and flanges see Table No1 3 13 Internal square wave modulation frequency KHz 1 100 3 14 External square wave modulation frequency KHz 1 100 3 15 External Power Control
26. nscxeacapnseesatasgeaesnweaacaaneees 16 3 Disposition of controls of BWO module sseseeeeeseeseeeesessresresressrseresrersrrsresrersresresees 17 4 The diagram of the Control Voltage and strobes eseesseseeesseseesessrrerisrersrrsriserrsresrese 18 5 Output power versus frequency dic n 2catsseaneeounaeseecaonepsovaeetawese sa ierescewepeaees 19 6 Frequency versus Control voltage Frequency versus High voltage monitor 20 7 Electrical Scheme of BWO Tube esssssesesesrrrrrrrrssseerrrrrrrerrsssrerrrrrreeeee 30 SGMW xxx Millimetre Wave Oscillator User Manual ELVA 1 1 GENERAL REMARKS 1 1 Microwave generator SGMW xxx series is intended to be used as a signal source in the millimetre range of wavelengths for tuning and adjustment of the radio electronic device 1 2 The Generator may be used in laboratory conditions 2 EXPLOITATION Conditions operations temperature 5 40 C relative air humidity up to 95 at the temperature 30 C primary power AC 220 10 V 50 0 5 Hz atmospheric pressure 84 112 kPa Some abbreviation used hereinafter BWO Backward Wave Oscillator VSWR Voltage Standing Wave Ratio CW Continuous Wave OA Operating Amplifier LCD Liquid Crystal Display 3 PARAMETERS 3 1 The SGMW X series hereinafter called Generator is fully packaged sweeper series The sweeper consists of external module with BWO X series and power supply The device contains all the electronic cir
27. onnector 15 Menu button 16 Amplitude modulation mode switches 17 AM Input input plug TTL BNC connector 18 Power input input plug 0 10V BNC connector 19 Power control external power control switch 20 Input for PLL system BNC connector 16 SGMW xxx Millimetre Wave Oscillator User Manual ELVA 1 SUPPLEMENT 2 Front panel of the Generator Rear N N W N A N p Disposition of the plugs on the rear panel of the Power Supply 29 Keyboard connector for external keyboard 30 SVGA connector for external PC monitor 31 COM RS 232 port 32 GPIB interface plug 33 GROUND connector 34 Power Plug AC 220V input with fuse 3A 35 Fan 36 HV connector to BWO module 17 SGMW xxx Millimetre Wave Oscillator User Manual SUPPLEMENT 3 Disposition of controls of BWO module 29 Power indicator 30 RF output 31 Time operating counter 32 HV connector to power supply 33 Cooling fan SGMW xxx Millimetre Wave Oscillator ELVA 1 18 User Manual ELVA 1 SUPPLEMENT 4 The diagram of the Control Voltage and strobes Regime RO Fout Ustrob Regime R1 Fout Ustrob 1 3 The diagram of the internal triangle wave control voltage on plug 12 2 4 The diagram of TTL output strobe signal on plug 11 T sweep time set by Digital Keyboard 8 or by GPIB bus command S strobe time duration about 0 005 sec 4
28. ot 7 Dependence of Output Power versus frequency by various Power Levels for W band BWO 140 Output Power vs Frequency 130 120 Frequency GHz 110 100 nV 90 g 80 o 70 a H 69 Af ANA 5 50 ANN A e 40 30 20 pawn seine aea er 10 0 pe ee N st o o N st o o N o st o N N N N a oO a z 2 2 The structure of the calibration data The data in the calibration files are placed in ten columns divided by the tabs Uinp HVm P33 F33 P50 F50 P75 F75 P100 F100 3 101 1 772 5 2 74 255 10 5 73 884 15 6 73 582 21 5 73 272 3 105 1 777 5 2 74 306 10 5 73 932 15 6 73 633 21 5 73 324 e The first column Uinp is a control voltage in V applying to the external broadband frequency input 10 see supplement 1 e The second column HVm is a voltage in V measured on the HV Monitor output plug 27 see supplement 2 corresponding to the data placed in the first column e The third column P33 is measured output power of Generator in mW at 33 power level corresponding to the data placed in the first column e The forth column F33 is a Generator frequency in GHz at 33 power level corresponding to the data placed in the first columns e The fifth column P50 is measured output power of Generator in mW at 50 power level
29. r Manual ELVA 1 SUPPLEMENT 7 Plot 4 Dependence of Output Power versus frequency by various Power Levels for V band BWO Output Power vs Frequency Y At r An Asi ttt ARLE at 40 CECA aa ee 20 NA 10 Output Power mW T t O O KOQOQOTrAMYO OnO OD O O O O O O O O O O O O O O O O Frequency GHz The structure of the calibration data The data in the calibration files are placed in ten columns divided by the tabs Uinp HVm P40 F40 P50 F50 P75 F75 P100 F100 1 3 1 53 2 2 49 596 20 3 49 199 29 1 48 993 25 9 48 793 1 304 1 533 2 2 49 597 20 3 49 202 29 1 48 997 25 6 48 8 The first column Uinp is a control voltage in V applying to the external broadband frequency input 10 see supplement 1 The second column HVm is a voltage in V measured on the HV Monitor output plug 27 see supplement 2 corresponding to the data placed in the first column The third column P25 is measured output power of Generator in mW at 25 power level corresponding to the data placed in the first column The forth column F25 is a Generator frequency in GHz at 25 power level corresponding to the data placed in the first columns The fifth column P50 is measured output power of Generator in mW at 50 power level corresponding to the dat
30. rce for accelerating electrode of BWO 500 3000V Controlled 5 230 V DC voltage intended to feed BWO control electrode greed DC 1 2 V voltage source intended to feed the BWO heater Heater and greed voltage sources are connected with accelerating electrode of BWO and keep under high voltage DC 12 and 12 V voltage sources intended to feed OA s DC 5 V voltage source intended to feed computer and relays BWO current overload protection circuit intended to switch off the high voltage transformer if load current of decelerator power supply is larger than 50 mA Control voltage overload protection circuit is intended to switch off the BWO control electrode voltage if deceleration voltage is lower than 300 V This circuit allows also the BWO control electrode voltage to be supplied if only the deceleration voltage higher than 300 V is presented on BWO s deceleration electrode when the Generator is being turning on BWO heater current overload protection circuit intended to limit the BWO heater current at the current spikes in the moment of Generator turning on High voltage indication READY 7 circuit is intended for signalling if decelerating voltage source is switched on On the front panel of generator are installed the following controls see Supplement 1 e Button Power 1 to turn on the generator and indicator Power 6 to indicate condition of generator Button Reset restarts built in microcomputer
31. s e Save current settings in flash memory Only last settings are stored and then loaded in the device automatically If one would like to store some special set up he should to install desire settings as described in par 9 1 9 4 Then one should enter to main menu Press the button Menu 15 if it is needed Press key 6 on Digital Keyboard 9 to activate command Save Program from main menu Choose number of program from 0 to 9 pressing the corresponding key on Digital Keyboard 9 The current set up will be stored e Load set up from flash memory If one would like to load set up saved in flash memory he should enter to main menu Press the button Menu 15 if it is needed Press key 7 on Digital 13 SGMW xxx Millimetre Wave Oscillator User Manual ELVA 1 Keyboard 9 to activate command Load Program from main menu Choose number of set up from 0 to 9 pressing the corresponding key on Digital Keyboard 9 5 Test parameters of BWO tube This mode allows measure actual operating voltages and currents for BWO tube HV High voltage monitor Ug BWO Control voltage for grid of BWO Iheat Heating Current Ugrid Grid voltage of vacuum tube lanode HV current Pwr control setting Power control Mode Amp Modulat setting AM Mode Frq control setting Frequency Control Mode Press key on Digital Keyboar
32. splay Press key Enter to finish editing and change the AM frequency If one will try to enter a wrong frequency out of operating frequency range max or min one available will be installed correspondingly e In the case of AM only fixed values could be installed PC main board counter 2MHz x provides these values If one try to enter a value that isn t fitted to the grid exactly the fitting will be produced automatically 9 3 3 Set External Amplitude Modulation Press button External in Amplitude Modulation group of buttons 16 and square wave 100 amplitude modulation with frequency of an external triggering source is provided in this mode Feed the 5 V TTL positive pulses with a frequency in the range 1 100 kHz and duty ratio 2 Square wave into the AM Input 17 After that Generator will provide amplitude modulation with frequency of the triggering signal 9 4 Save and load operation set up Generator automatically saves all settings from par 9 1 9 4 just after one changes these Current set up is stored in memory and loaded after restart There are 10 user defined operation set ups stored in flash memory Each set up consists of the following settings Initial frequency Final frequency Fixed frequency Output power level Sweep time Sweep type External of Internal Frequency control mode External of Internal Power control mode External Internal or OFF amplitude modulation mode GPIB addres
33. the Generator is defined by a joint functioning of the next parts of the device e Operating regime switch e Modulator e 5 237 V controlled voltage source e BWO control electrode SGMW xxx Millimetre Wave Oscillator User Manual ELVA 1 The BWO current overload protection circuit receives the signal proportional to the decelerating system current When this current is larger than 50 mA the circuit comes into action and disconnect the high voltage transformer and glow control indicator on the front panel 8 In order to switch the high voltage source again it is necessary to turn off and then turn on the power switch The high incidence of activation of this circuit testifies that Generator is out of order The BWO control voltage overload protection circuit receives the signal proportional to the BWO decelerating system voltage This circuit is a part of the modulator circuit When BWO decelerating voltage falls down bellow 300 V the BWO control electrode voltage is switched off In particular this circuit comes into action when high voltage transformer is switched off The BWO heater overload protection circuit is a part of heat stabiliser circuit It provides the limitation of BWO heater current during the transition process at the turning on the Generator 7 OPERATION MANUAL ATTENTION Before turning on the Generator ensure that device is properly grounded using the corresponding contact L When using the Generator
34. wer and time of sweep The sweep can be provided in two forms see Supplement 4 During one sweep Control Unit provides linear increasing of output frequency and then fast decreasing during approximately 5 ms time reg 0 and over one linear increasing and the decreasing of output frequency reg 1 e Set the desired sweep time initial and final frequency e Turn on the Generator as directed in part 8 Set Internal Frequency control as described in par 9 1 1 Press button Menu 15 to activate the Sweep Menu e There are the following commands in this local menu 1 SFreq GHz set Initial Frequency 2 EFreq GHz set Final Frequency 3 Time s set sweep time 4 Sweep Start 5 0 Up 1 Rev___ set sweep type e To enter desired value of sweep time Initial and Final frequencies to use method described in par 9 1 1A e Sweep Time could be installed from 0 01 to 99 99 sec with step 0 01s using digital Keyboard and 1 sec by buttons Step lt or gt 4 or Rotate Tuning Knob 5 e To start sweep press key 4 on Digital Keyboard 9 Generator indicates initial and final frequencies of sweep and starts sweeping At the beginning of each sweep Generator produces TTL strobe pulses Use Strobe Signal output plug 11 for the triggering of external devices at the moment of the sweep beginning see Supplement 4 e To stop sweep press key Menu 10 SGMW xxx Millimetre Wave
35. xx Millimetre Wave Oscillator User Manual ELVA 1 9 PURSUANCE OF MEASUREMENTS There are two operating menus witch are controlled by Menu button 15 Main Menu Sweep Menu Main Menu consists of 1 Freq GHz 2 Power 3 Fr Step GHz 4 AM kHz 5 GPIB adr 6 Save program 7 Load program Sweep Menu consists of 1 Sfreq GHz 2 Efreq GHz 3 Time S 4 Sweep Start 5 0 Up 1 Rev 9 1 Frequency control There are two modes of frequency control Internal and External Frequency Control modes Turn on the Generator as directed in part 8 9 1 1 Set Internal Frequency control mode One should check LED External on the button Frequency Control 13 If LED doesn t glow it means that the device is installed in Internal Frequency Control mode If LED glows one should press button Frequency Control to switch off LED on the button 13 A Fixed frequency mode At this mode the operation frequency is fixed e Turn on the Generator as directed in part 8 e Set Internal Frequency control as described in par 9 1 1 e Press button Menu 15 to active the Main Menu e Set frequency step using command 3 Fr Step GHz from Main menu for that press 3 on digital keyboard 9 enter frequency step for tuning in GHz from keyboard and press Enter e Using buttons Step lt or gt 4 or Rotate Tuning Knob 5 install marker opposite line 1 Freq GHz of Main
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