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To order AR Products, call 215.723.8181.  For an applications engineer call:800.933.8181. Direct to Service call: 215.723.0275 or  

email: 

[email protected]

  For Faxing Orders:866.859.0582 (Orders Only Please) 

[email protected]

 

Approved for public release by AR RF/Microwave Instrumentation 

011017 

25A250B 



25 Watts CW  



10kHz–250MHz  

 

Envelope Drawing 

Summary of Contents for 10043414

Page 1: ...Operating and Service Manual 25A250B Model 10043414 Part Number Serial Number 160 School House Road Souderton PA 18964 215 723 8181 Fax 866 859 0582 www arworld us ...

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Page 3: ...y Requirements for Electrical Equipment for Measurement Control and Laboratory Use Part 1 General Requirements UL 61010 1 Issued 2012 05 11 Ed 3 Safety Requirements for Electrical Equipment for Measurement Control and Laboratory Use Part 1 General Requirements CAN CSA C22 2 61010 1 Issued 2012 05 11 Ed 3 Safety Requirements for Electrical Equipment for Measurement Control and Laboratory Use Part 1...

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Page 5: ...en Minimalwerte der Schirmdämpfung und Filterung in den unterschiedlichen Leistungsklassen empfohlen Hochfrequenzleistung min Schirmdämpfung 100 Watt 50 dB 101 1000 Watt 60 dB 1001 10 000 Watt 70 dB Falls andere elektrische oder elektronische Geräte gleichzeitig mit dem Gerät betrieben werden kann es zu Beeinflussungen kommen Da das Gerät zur Erzeugung von Hochfrequenzenergie dient ist es daher au...

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Page 7: ... clearance on all vented sides of the equipment to permit the airflow required for proper ventilation Do not restrict airflow into the equipment by blocking any vents or air intakes Restricting airflow can result in damage to the equipment intermittent shut downs or safety hazards Keep equipment away from extremely hot or cold temperatures to ensure that it is used within the specified operating r...

Page 8: ...na assembly may be heavy requiring two persons to lift Use caution when installing or removing unit Follow all equipment setup and lifting instructions specified in this document Ensure connectors are appropriate for intended operation Connectors are specified in the user manual and product specification sheet Do not exceed the maximum RF input level stated in the specifications Refer to the user ...

Page 9: ...von 10 2 cm 4 in auf allen belüfteten Seiten des Geräts ein um eine ausreichende Luftzirkulation zu gewährleisten Beinträchtigen Sie den Luftstrom des Geräts nicht indem Sie Lüftungsöffnungen oder den Lufteinlass blockieren Wird der Luftstrom eingeschränkt kann dies zu Schäden am Gerät periodischen Abschaltungen und anderen Gefahren führen Halten Sie das Gerät von extrem heißen oder kalten Tempera...

Page 10: ...n in diesem Dokument angegebenen Anweisungen zur Anbringung Stellen Sie sicher dass alle Anschlüsse für den beabsichtigten Betrieb geeignet sind Informationen zu den Anschlüssen erhalten Sie im Benutzerhandbuch und im Produktspezifikationsblatt Überschreiten Sie nicht den in Spezifikationen angegebenen maximalen HF Eingangspegel Informationen zum geeigneten HF Pegel erhalten Sie im Benutzerhandbuc...

Page 11: ...imitez pas le flux d air allant dans l équipement en bloquant tout évent ou entrée d air La restriction du flux d air peut endommager l équipement causer des coupures intermittentes ou des dangers pour la sécurité Tenez l équipement à l écart de températures extrêmement chaudes ou froides pour veiller à ce qu il soit utilisé dans la plage de fonctionnement indiquée Lorsque vous installez des acces...

Page 12: ...z prudent lorsque vous installez ou retirez l unité Respectez toutes les instructions concernant l installation et le levage de l équipement indiquées dans ce document Assurez vous que les connecteurs sont appropriés pour l utilisation prévue Les connecteurs sont indiqués dans le manuel d utilisation et la fiche signalétique du produit Ne dépassez pas le niveau d entrée RF maximal indiqué dans les...

Page 13: ...g is voor goede ventilatie mogelijk te maken Belemmer de luchtstroom in het apparaat niet door ventilatieopeningen of luchtinlaten te blokkeren Het belemmeren van de luchtstroom kan leiden tot schade aan het apparaat onregelmatige uitvallen of veiligheidsrisico s Houd het apparaat uit de buurt van extreem hoge of lage temperaturen om ervoor te zorgen dat het apparaat binnen het gespecificeerde wer...

Page 14: ...instellen en optillen van de apparatuur die in dit document worden vermeld Zorg ervoor dat de connectoren geschikt zijn voor de beoogde werking De connectoren worden gespecificeerd in de gebruikershandleiding en in het productspecificatieblad Overschrijd het maximale RF ingangsniveau niet dat in de specificaties is vermeld Raadpleeg de gebruikershandleiding en het productspecificatieblad om de toe...

Page 15: ...ule Schematic 10040606 17 3 3 Power Supplies PS1 PS2 17 3 4 Control System 18 3 4 1 A4 Control Fault Board Schematic 10042218 18 3 4 2 A5 Interface Board Schematic 10020073 18 4 MAINTENANCE 19 4 1 General Maintenance Information 19 4 2 Disassembly Procedure 19 4 3 Troubleshooting 20 4 3 1 Power On Indication Doesn t Display on Front Panel Vacuum Fluorescent Display VFD when POWER Switch is Depress...

Page 16: ...1 Typical Response at 20dBm Input 24 4 2 Typical Response at 0dBm Input 24 TABLES 2 1 IEEE 488 Address Selection 9 2 2 RS 232 Port Settings 10 2 3 RS 232 DCE Port Pinout Diagram DB 9 Female 10 2 4 Fiber Optic Port Settings 11 2 5 Relationship between DCP Controls and Remote Communication 12 ...

Page 17: ...lifier including adjustment of the amplifier s RF Gain during CW mode operation and provides graphical displays of the amplifier s Forward and Reflected power levels A General Purpose Interface Bus GPIB IEEE 488 2 interface for remote control of the amplifier s operating functions RS232 serial communications including both wire and fiber optic ports for remote control USB Communication port for re...

Page 18: ... air into or exiting from the unit will not be restricted diverted or re circulated through the unit itself in particular the flow of warm air exiting the rear of the amplifier should not be impeded Do not position the unit next to a wall or other equipment that would restrict the flow of air into the bottom of the unit or out of the rear of the unit 1 4 2 Power The Model 25A250B is designed to op...

Page 19: ... equipment is EAR99 The Model 25A250B is a solid state self contained air cooled broadband amplifier designed for applications where instantaneous bandwidth high gain and linearity are re quired Available in a stylish contemporary cabinet for benchtop use or with cabinet re moved for rack mounting The Model 25A250B when used with a sweep generator will provide a minimum of 25 watts of RF power Inc...

Page 20: ...m at 20 watts 35 dBc typical at 15 watts SPURIOUS Minus 73 dBc typical PRIMARY POWER Universal selected automatically 100 240 VAC 50 60Hz 200 watts CONNECTORS RF Input N female RF Output N female REMOTES PACKAGE IEEE 488 24 pin female RS 232 9 pin subminiature D female Fiber optic ST Conn Tx and Rx RS 232 USB 2 0 Type B Ethernet RJ 45 Safety Interlock 15 pin subminiature D COOLING Forced air self ...

Page 21: ...Page 3 25A250B 25 Watts CW 10kHz 250MHz Graphs ...

Page 22: ...Page 4 25A250B 25 Watts CW 10kHz 250MHz Graphs ...

Page 23: ...neer call 800 933 8181 Direct to Service call 215 723 0275 or email service arworld us For Faxing Orders 866 859 0582 Orders Only Please info arworld us Approved for public release by AR RF Microwave Instrumentation 011017 25A250B 25 Watts CW 10kHz 250MHz Envelope Drawing ...

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Page 25: ...to withstand without damage RF input power levels up to twenty 20 times its rated input of 1mW However signal levels higher than 20mW or transients with high peak voltages can damage the amplifier Also accidental connection of the Model 25A250B s output to its input either through direct connection or parasitic feedback paths will cause oscillations that may permanently damage the unit s input tra...

Page 26: ...ear panel is set to the 1 on position 5 Press the POWER switch the front panel vacuum fluorescent display VFD should read POWER ON when power is applied NOTE The amplifier changes state each time the POWER switch is depressed if the unit is on when the POWER switch is depressed it will turn off if the unit is off when the POWER switch is depressed it will turn on 6 Adjust the amplifier s gain by r...

Page 27: ...8 bus is already using address 1 reset the switch to a vacant address Resetting the address requires re booting the unit Specific IEEE 488 bus commands depend on which software package you are using To send commands be sure that the amplifier s address is set properly and that the controller has correctly identified the unit as a listening device When sending commands to the unit via the GPIB inte...

Page 28: ...in 3 RD Pin 4 DTR Pin 5 GND Pin 6 DCR Pin 7 CTS Pin 8 RTS Pin 9 Unused 2 4 3 Fiber Optic Communications The Fiber Optic port is a serial communications bus All commands and queries through this port must be terminated with a LF When a valid query is received it is processed and the result is immediately transmitted back over the Fiber Optic interface This port is designed to time out if there is n...

Page 29: ...B hub must be used A cable carrying the official USB logo is recommended When connected to a PC running Windows 2000 or XP a window will pop up labeled Hardware Wizard If this PC has National Instruments LabView installed it will have a USBTMC driver that will work with this port This driver will allow the device to be easily controlled using National Instruments Measurement and Automation Explore...

Page 30: ... be sent in Remote mode All spaces in commands and queries are indicated by space A COMMUNICATIONS_ERROR LF can occur if the time between commands or queries is too short or the internal RS 485 link between the IO Board and the Control Board is broken The development of application programs requires an understanding of the operation of the amplifier as well as the intended application An applicati...

Page 31: ...5 steps of resolution Syntax Gxxxx Parameters Gain xxxx xxxx 0000 to 4095 Where 0000 Minimum gain 4095 Maximum gain Response Format Same as command syntax Example To set the amplifier to minimum gain send the following command G0000 LF To set the amplifier to 50 Gain send the following command G2048 LF To find out the gain setting of the amplifier send the following query G LF Response G3075 LF 30...

Page 32: ...dentity of the amplifier send the following command IDN LF Response AR RF MICROWAVE INST 25A250B 1 0 LF 2 4 6 5 IO Board Firmware Revision Query to get the firmware revision of the IO Board Syntax IOB Parameters None Query only always requires a character Response Format INTERFACE_BOARD_SW_REVx LF Where x firmware revision Example To get the firmware rev of the IO Board send the following command ...

Page 33: ... amplifier The definitions of these bit positions can be found in the table below Note Bits labeled NOT USED may be read as a bit state of 1 or 0 BIT STATE BIT POSITION BIT DESCRIPTION 0 1 NOTES x 0 NOT USED 1 NOT USED 2 NOT USED 3 REMOTE CONTROL DISABLED ENABLED Response to mode switch position y 0 POWER STATUS OFF POWER ON 1 NOT USED 2 NOT USED 3 FAULT STATUS OFF FAULT EXISTS z 0 NOT USED 1 NOT ...

Page 34: ... the amplifier Syntax FSTA Parameters None Response Format FSTA space 00xx Where xx 00 to 34 Hexadecimal xx Dec Description 0 00 No Fault 1 01 Interlock 3 03 Thermal A1 5 05 Amp A1 Example To find out what faults have occurred send the following query FSTA LF Response FSTA 0002 LF Interlock Fault ...

Page 35: ...8V and the drain current for the entire module is approximately 4A The module has an output compression point of 20W or greater The current through Q9 is monitored by U8 The output of U8 is fed to an op amp U10 U10 has a reference voltage on the non inverting input which represents the maximum allowable drain current U10 reacts when the output of U8 is surpasses this reference voltage which reduce...

Page 36: ...upplied using only a single 5 volt power supply The board offers the following Feature Quantity Open drain outputs 4 Digital outputs 6 Digital inputs 5 volt tolerant 24 Analog outputs 2 2 channel encoder input 1 Inputs for a keypad 6 Display connectors 1 Serial communication jacks 2 3 4 2 A5 Interface Board Schematic 10020073 3 5 A10 VOLTAGE REGULATOR BOARD The A10 Voltage Regulator Board contains...

Page 37: ...r However due to the importance of the amplifier s alignment it is recommended that when failure is caused by breakdown of any of the components in the signal circuits the amplifier be returned to the factory for part replacement and amplifier realignment Shipping instructions are as follows To return an item contact AR Customer Service for an RMA number and shipping instructions Returns from outs...

Page 38: ...kstations by individuals who are familiar with the handling of microwave GaN HEMTs and other ESD sensitive devices Troubleshooting the Model 25A250B in a logical manner can speed the solution to a problem The settings of potentiometers pots capacitors caps or other variables should not be disturbed until other problems have been eliminated Comparing the measured DC voltages to those shown on the s...

Page 39: ...1 is not running check to see that the unit is plugged into a live outlet and that the AC line cord is plugged securely into the unit 4 Check the 5V housekeeping output voltage from PS1 this voltage should be as follows PS1 P7 Pin 1 5 0 0 2VDC 5 If output voltage is not present on PS1 check the AC input to PS1 6 Check the voltage to the A4 Control Fault Board on connector J3 the voltages should be...

Page 40: ...oling fans is operating normally check the voltage at the A4 Control Fault Board J13 Pin 28 should be 0 1V 3 If the voltage on A4 J13 pin 28 is high check the connection to J3 5 and C53 4 3 4 Interlock Fault Schematic Diagram No 10042820 The Model 25A250B is equipped with an interlock connector which is located on the rear panel The interlock circuit can be used to sense the openings of doors to s...

Page 41: ... operating 1 Check the position of the RF Gain control is it set to maximum gain 2 Check the RF input to the unit is it the correct amplitude and frequency 3 Check the RF output connection from the unit is it correctly connected to the load Is the coaxial cable okay 4 Check the following voltages on the Power Supply If any of the voltages are out of tolerance correct them before further troublesho...

Page 42: ...cting the RF tests specified in the following sections 1 The Model 25A250B s typical gain response at 20 dBm input and 0 dBm input is shown in Figures 4 1 and 4 2 respectively The actual gain may vary considerably from that shown in Figure 4 1 but should be 46 dBm at 0dBm input TR2 Figure 4 1 Typical Response at 20dBm Input Figure 4 2 Typical Response at 0 dBm Input ...

Page 43: ... cover If the security label is removed and or cut the warranty of the module will be voided Vacuum tubes in the L series amplifiers traveling wave tubes in TWT amplifiers and power heads will be free from defects in material and workmanship for a period of one 1 year Contact AR RF Microwave Instrumentation for warranty information regarding items not listed Seller s sole responsibility in fulfill...

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