AR 0053007 Operating And Service Manual Download Page 38

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Model 2500A225C

Rev A

2.5 AMPLIFIER OPERATION

2.5.1

Local Operation

Connect the input signal to the unit’s RF INPUT connector. The input signal level should be 0dBm

maximum.

Connect the load to the unit’s RF OUTPUT connector.

Set the REMOTE/LOCAL switch to LOCAL.

Check to see that the MAIN POWER switch on the unit’s rear panel is set to the 1 (on) position.

Press the POWER button.

Place the unit in the Operate mode by pressing the RF On/Off touch screen button.

Adjust the amplifier’s gain by rotating the ADJUST knob.

In the event of a fault, press the RESET touch screen button; if the fault does not clear, refer to Section 4.3

Troubleshooting

of this manual.

Summary of Contents for 0053007

Page 1: ...Operating and Service Manual 2500A225C Model 10053007 LV 10053008 HV Part Number Serial Number 160 Schoolhouse Road Souderton PA 18964 215 723 8181 Fax 866 859 0582 www arworld us ...

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Page 3: ...or 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 General Requirements HAZARDOUS SUBSTANCES RoHS DIRECTIVE 2011 65 EU of the European Parliament and of the Council of 8 June 2011 on the restriction of the use of certain hazardous substances...

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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: ...ting 7 16 DIN Connectors 11 2 4 2 3 Torquing 7 16 DIN Connectors 12 2 4 2 4 De Mating of 7 16 DIN Connectors 12 2 4 3 IEEE 488 USB and RS 232 Interfaces 13 2 4 4 Safety Interlock Connector 13 2 4 5 RF Sample Ports 13 2 5 Amplifier Operation 14 2 5 1 Local Operation 14 2 6 Local User Interface 15 2 6 1 Menu Map 15 2 6 2 Inhibit Screen 15 2 6 3 Main Menu Screen 16 2 6 4 Select Screen 17 2 6 5 Mode S...

Page 16: ...2 11 8 ALC Detector Gain Adjust 34 2 11 9 ALC Threshold Level Adjust 34 2 11 10 ALC Response Setting Adjust 35 2 11 11 Identity Query 35 2 11 12 IO Board Firmware Revision Query 35 2 11 13 Machine State Query 36 2 11 14 Amplifier State Query 36 2 11 14 1 Hex Character to Binary Bits conversion table 37 2 11 15 Forward Power Query 38 2 11 16 Reverse Power Query 38 2 11 17 Operating Hours RF ON Quer...

Page 17: ...or LV 10053509 for HV 51 4 4 5 1 PS1 and PS2 Fault 51 4 4 5 2 PS3 through PS6 Fault 51 4 4 6 Amplifier Faults Schematic 10052651 for LV 10053509 for HV 51 4 4 7 ALC Fault 51 4 4 8 Low or No Power Output DC Tests Schematic 10052651 for LV 10053509 for HV 52 4 4 9 Low or No Power Output RF Test 53 4 5 Locating and Replacing Modules 55 Appendix A Installing Software Upgrades 59 FIGURES 1 1 2500A225C ...

Page 18: ...Model 2500A225C iv ...

Page 19: ...CW mode operation and provides graphical displays of the amplifier s Forward and Reflected power levels RF Output Level Protection 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 remote control Ethernet Communication...

Page 20: ...wire Wye compatible A 40 amp or greater common trip circuit breaker should be used to supply power to the 2500A225C low voltage model Included with the low voltage model is a 15 foot four conductor harmonized line cord consisting of three phase wires Brown Black Grey and a protective GND connector Green Yellow High Voltage Model 10053008 The Model 2500A225C is designed for a primary power input of...

Page 21: ...of RF power Protection from input overdrive beyond 0 dBm is provided as well as protection from various failure conditions including over temperature and power supply faults A front panel display indicates the operational status and fault conditions All amplifier control functions and status indications are available remotely using GPIB IEEE 488 RS 232 fiber optic serial USB or Ethernet Interface ...

Page 22: ...3dB 2000 2300 2500 W Power Output 3dB Compression 200 225 MHz P3dB 1800 2000 2000 W Power Output 1dB Compression 0 01 100 MHz P1dB 2000 2400 2700 W Power Output 1dB Compression 100 200 MHz P1dB 1500 1900 2100 W Power Output 1dB Compression 200 225 MHz P1dB 1300 1500 1600 W Operating Frequency BW 0 01 225 MHz Gain Small Signal 64 dB Gain Reduction Adjustment when below gain compression 0 20 dB Flat...

Page 23: ... 1 may limit output reflected power to 50 of minimum rated power 50 AC Power 3 phase Low voltage option 200 240 VAC AC Power 3 phase High voltage option 380 415 VAC AC Power 47 63 Hz Ambient Temperature 5 25 40 C Storage Temperature 20 50 C Altitude 2000 m Shock Vibration Normal Truck Transport Mechanical Specifications Parameters Unit Dimensions W x H x D 35U Rack 57 4 x 136 x 67 1 cm 22 6 x 53 5...

Page 24: ...2 9 pin subminiature D female RS 232 fiber optic ST USB 2 0 Type B Ethernet RJ 45 Interlock 15 pin subminiature D female AC Input 5 meter harmonized power cord supplied with amplifier The power cords are left open ended to allow for facility power connection of user s choice Ordering Options 2500A225C N R 716 Model RF IN Conn Location Type RF OUT Conn Location Type RF Sample Ports Primary Power CO...

Page 25: ...d us www arworld us ISO9001 2015Certified ISO17025 2017Accredited 5 TYPICAL OUTPUT POWER LINEAR FORMAT TYPICAL OUTPUT POWER LOG FORMAT 0 500 1000 1500 2000 2500 3000 3500 4000 4500 5000 Power Watts Freq MHz P1dB P3dB P 0dBm Input 0 500 1000 1500 2000 2500 3000 3500 4000 4500 5000 Power Watts Freq MHz P1dB P3dB P 0dBm Input ...

Page 26: ... Souderton PA18964 215 723 8181 info arworld us www arworld us ISO9001 2015Certified ISO17025 2017Accredited 6 TYPICAL SMALL SIGNAL GAIN 20dBm INPUT TYPICAL HARMONICS 1750 WATTS 60 61 5 63 64 5 66 67 5 69 70 5 72 73 5 75 Gain dB Freq MHz 70 60 50 40 30 20 10 0 dBc Freq MHz 2nd 3rd ...

Page 27: ...t 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 ISO 9001 2015 Certified ISO 17025 2017 Accredited Revision 030722 7 TYPICAL INPUT VSWR TYPICAL NOISE FIGURE 1 1 1 1 2 1 3 1 4 1 5 1 6 1 7 VSWR Freq MHz 5 5 5 6 6 5 7 7 5 8 8 5 9 9 5 10 Noise Figure dB Freq MHz ...

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Page 29: ... mode without a load connected to the output connector is not recommended It has also been designed 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 2500A225C s output to its input either through direct connectio...

Page 30: ...ailed in Figure 2 2 2 1 3 4 Figure 2 1 Model 2500A225C Front Panel Item Title Function 1 INHIBIT LOCAL REMOTE Keylock Switch 3 position key removal in INHIBIT position only 2 POWER POWER control with indicator LED 3 DISPLAY TOUCH SCREEN Numerous parameter values and fault messages plus manual input control 4 ADJUST Adjust knob to change selected variables ...

Page 31: ...us monitoring using the controls listed below 2 3 1 1 Keylock Switch The Keylock Switch is provided for protection from unauthorized use or unexpected remote control of the amplifier The amplifier can only be turned on locally when the Keylock Switch is in the LOCAL position Likewise the unit can only be turned on or controlled remotely when the Keylock Switch is in the REMOTE position Placing the...

Page 32: ...in ALC Threshold and ALC Detector Gain is 0 to 100 percent The range of the ALC Response is 1 to 7 The ADJUST knob can be rotated both clockwise and counterclockwise 360 degrees 2 3 1 4 Touch Screen The touch screen is a color LCD that can accept single touch events from soft blunt objects such as a human finger The mechanism that registers touch events is resistive based and relies on pressure no...

Page 33: ...ent prevent damage to the amplifier s external connector and supporting equipment and will minimize the torque applied to the front panel connectors Excessive torque cannot only damage the front panel connectors of the analyzer but may also damage the mating connector resulting in poor RF performance and inaccurate measurements 2 4 2 1 Inspection and Cleaning When the connector threads are clean a...

Page 34: ...city Index Description 1 Centered 2 Maximum allowable off center 3 Fall off center Discard connector 2 4 2 1 3 Cleaning When the connector threads of the connectors are connected and disconnected the threads and outer conductor mating interfaces can build up a layer of dirt metal chips and other foreign material These contaminants can degrade electrical and mechanical performance To prevent inaccu...

Page 35: ...round the center pin Do not touch the center pin 2 4 2 2 Mating 7 16 DIN Connectors Perform a careful inspection of the connector and if necessary blowout or clean any particle matter out of the connector Next carefully but firmly push the male 7 16 end of the device or adapter straight into the female 7 16 receptacle of the connector See Figure 2 4 Care must be taken to ensure that the connectors...

Page 36: ...acement of Wrenches on Connector 2 4 2 4 De Mating of 7 16 DIN Connectors De mating of the 7 16 connectors can be achieved by utilizing a similar technique as described in the mating portion of this application note To de mate the 7 16 interface place one wrench on the body of the connector and a second wrench on the connecting nut of the attached device or adapter Using equal and opposite amounts...

Page 37: ...e rear panel as viewed from the rear are the remote interface connectors and safety interlock connectors The 15 pin D sub miniature female safety interlock connector provides two separate interlock loops Pins 1 and 8 are used for situations where the amplifier can be left on but forced into STANDBY mode This interlock is called Inhibit Interlock Pins 10 and 14 are used for situations that demand t...

Page 38: ... the REMOTE LOCAL switch to LOCAL 4 Check to see that the MAIN POWER switch on the unit s rear panel is set to the 1 on position 5 Press the POWER button 6 Place the unit in the Operate mode by pressing the RF On Off touch screen button 7 Adjust the amplifier s gain by rotating the ADJUST knob 8 In the event of a fault press the RESET touch screen button if the fault does not clear refer to Sectio...

Page 39: ...r The screens depicted are only example screens The actual values and settings will be different on the actual amplifier depending on user settings and operating conditions 2 6 2 Inhibit Screen The Inhibit screen is used as an indication to the user that the amplifier is in an inhibited mode In INHIBIT mode the POWER button cannot be used and no touch screen menu options are available In addition ...

Page 40: ... VSWR based on the ratio of the forward and reverse power To set the VSWR Limit press the User button to open the User screen then the VSWR Lim button For more information see the VSWR Limit section below Under the RF State the Automatic Leveling Control ALC Mode setting is displayed as either Mode Manual or Mode ALC Int To change the ALC mode press the Mode button For more information see the Mod...

Page 41: ...ll automatically change back to the Main Menu screen The blue bar graph and associated value will change to reflect the value of the selected item 2 6 5 Mode Screen The Mode screen is the same as the Main Menu screen except for the menu options The menu options in this screen allow the user to select the ALC mode Once a selection is made the screen will automatically change back to the Main Menu s...

Page 42: ... the RF On and Power On Operating Hours are displayed A menu option is provided for accessing the settings for the remote I O ports found on the rear of the unit see I O Screen section and for setting the VSWR Limit see VSWR Limit section 2 6 7 Breakout Firmware Screen The Breakout Firmware screen is accessed by clicking the More button within the User Screen and shows the firmware revisions for a...

Page 43: ... to the black text at the top of the screen and the grey text in the box will clear Press the BSP button Backspace to remove the last number entered or use the CLR button Clear to clear the entry completely If a frequency is entered that is either above or below the amplifier s specified frequency range the value will be coerced to the upper or lower frequency limit when the ENT button is pressed ...

Page 44: ...e GPIB address screen is used to select the GPIB address To get here from the Main Menu touch the User menu button followed by the I O menu button and finally the GPIB menu button Touching any of the buttons labeled 1 to 30 immediately sets the GPIB address to the corresponding value A thin black outline indicates the present GPIB address selection When the back button is pushed the address select...

Page 45: ...in black outline indicates the present baud rate selection When the back button is pushed the baud rate selection is stored to non volatile memory If power is lost prior to hitting the back button any baud rate selection changes will be lost The default baud rate is 19200 2 6 13 Key Beep Screen The Key Beep screen allows the user to turn on or off the audible beep that occurs when a valid touch ev...

Page 46: ...he screen 2 6 15 Fault Screen The Fault screen will appear anytime that a fault condition is met The name of the fault is shown toward the center of the screen In either LOCAL or REMOTE Keylock switch positions a Reset button will appear allowing local resetting of the fault condition Faults can also be reset remotely If the fault reset is successful the screen will return to the Main Menu or Remo...

Page 47: ...play In addition while in the locked state the Adjust knob is automatically tied to the RF Gain adjustment which remains adjustable regardless of the ALC lockout state To access the ALC lockout feature the user must navigate to the GPIB address screen User I O GPIB Address and enter the password 23 15 5 3 1 See figure below The current GPIB address setting will not be lost during this process unle...

Page 48: ...n power supplies Below is a state diagram for the Power and RF states of the amplifier This diagram should be used to understand the major states that the amplifier can be in For simplicity of the diagram the Keylock switch position is only listed where relevant Power Off RF Off Power On Power On RF Off Power On RF On RF On Power Off RF Off Power Off 2 7 1 Power OFF RF OFF AC power is applied the ...

Page 49: ...tion 2 9 1 2 8 1 Switch Breakout Board A14A3 2 8 1 1 Connector J9 Notes Indicate a range representing a NO ACTION STATE i e 1 2 Vdc 2 3 Vdc Once activated inputs are checked for all following control states Guaranteed operation between 0 0 Vdc and 3 3Vdc damage occurs outside this range Control Line Input Control States Defined in section 4 Fault Yes General Description Add fault description in se...

Page 50: ...D Out Pwr OFF RF OFF Pwr ON RF OFF Pwr ON RF ON J5 1 F G G Interlock Contactor J5 2 F F G PS2 On Off J5 3 G F F PS3 On Off J5 4 F F G PS4 5 6 On Off J5 5 J5 6 J5 7 J5 8 J5 9 L PS3 Fault J5 10 L PS4 Fault J5 11 L PS5 Fault J5 12 L PS6 Fault J5 13 L L Interlock J5 14 L L AC Interlock J5 15 H Amp fault A1 J5 16 H Amp fault A5 J5 17 H Amp fault A6 J5 18 H Amp fault A7 J5 19 H Amp fault A8 J5 20 H Amp ...

Page 51: ...C Internal communications error A Fiber optic SBB ASSY failed to initialize B Fiber optic SBB ASSY stopped communicating C Mounted SBB ASSY failure A14A3 J5 9 0x0020 32 PS3 Pwr Supply Failure PS3 A14A3 J5 10 0x0021 33 PS4 Pwr Supply Failure PS4 A14A3 J5 11 0x0022 34 PS5 Pwr Supply Failure PS5 A14A3 J5 12 0x0023 35 PS6 Pwr Supply Failure PS6 A14A3 J5 15 0x0200 512 Amp A1 Amplifier Fault Module A1 A...

Page 52: ...text Internal for an internally generated fault from the control system i e Internal 485 bus error See the Control Lines section for details about each control line referenced A check mark in the RF Inhibit column indicates the RF output of the driver stages will be attenuated A check mark in the Drop to RF OFF column indicates the control state will be changed to Power ON RF OFF A Control Line De...

Page 53: ...process the command 2 10 1 GPIB IEEE 488 Communications For GPIB operation the device address is set using the front panel touch screen For more information about setting the GPIB address see the GPIB Address Screen section 2 6 9 Ensure that each device connected to the GPIB is set to a unique address When sending commands via the GPIB interface terminate commands with an EOI and a Line Feed chara...

Page 54: ...rt consult the Avago HFBR series datasheet found at www avagotech com The recommended specifications for the fiber optic cable are as follows Type Glass Multi mode Yes Core Size 50um minimum to 200um recommended Connector Type ST This port can be used in conjunction with a serial to fiber optic or USB to fiber optic interface such as an AR IF7001 USB to Fiber Optic interface NOTE The IF7001 device...

Page 55: ...t your network administrator for more information about how IP addresses are assigned and maintained If the connected network does not have DHCP enabled then the device can be assigned an IP address using a utility called DeviceInstaller downloaded from www Lantronix com For assistance using this utility please consult the embedded help file installed with the DeviceInstaller utility Once installe...

Page 56: ...FF Query No see the Amplifier State Query command Example To enable the RF Output send the following command RF ON LF Default Value OFF 2 11 3 RF Gain Adjust This command sets the RF Gain of the amplifier in percent Syntax LEVEL GAIN gain value gain value Specifies the RF gain in from 0 minimum to 100 maximum Query No see the Machine State query command Example To set the RF Gain to maximum send t...

Page 57: ...t the frequency to 15 5MHz send the following command CORR FREQ 15 5MHZ LF Example 2 To query the frequency send the following command CORR POW FREQ Response 15 5MHZ LF 2 11 6 VSWR Limit Selection This command sets the value of the output VSWR limit If the limit is exceeded a fault will be triggered and the RF output will be disabled Syntax VSWR LIM selection selection 0 None Default 1 6 1 2 3 1 3...

Page 58: ...lowing command MODE ALC space INT LF 2 11 8 ALC Detector Gain Adjust This command sets the ALC detector gain in percent Use this setting to change how aggressively the ALC feature reacts when the ALC Threshold value has been exceeded Syntax LEVEL DET det gain det gain Specifies the ALC Detector Gain in from 0 least aggressive to 100 most aggressive Query No see the Machine State query command Exam...

Page 59: ... 4 100m 5 1 6 3 7 3 2 11 11 Identity Query This command queries the amplifier for its identity response Query IDN Response Format AR RF MICROWAVE INST model firm rev LF model The model designation of the amplifier firm rev The firmware revision of the control software Example To query the identity of the amplifier send the following command IDN LF Response AR RF MICROWAVE INST 750S1G6C 1 0 LF 2 11...

Page 60: ... characters resp 1 character representing the ALC Response setting 1 7 Example To query the machine state send the following command MSB LF Response RF space GAIN 100 DT space GAIN space 50 THRES 75 RESP 1 LF RF gain is 100 Detector Gain is 50 ALC Threshold is 75 and ALC Response Time is set to 5mS 2 11 14 Amplifier State Query This command queries the state of the amplifier Query STATE Response F...

Page 61: ...ntained for backwards compatibility 2 RF Status 0 OFF 1 ON Formerly OPERATE STATUS 3 Fault Status 0 Okay 1 Fault char 3 0 Inhibited 0 No 1 Yes Response to keylock position INHIBIT 1 Not Used 2 Not Used 3 Not Used char 4 0 ALC Mode Manual 0 Disabled 1 Enabled ALC is set to default configuration 1 Not Used 2 ALC Mode Internal 0 Disabled 1 Enabled ALC is set to custom configuration 3 Not Used 2 11 14...

Page 62: ...ery the reverse power send the following command RPOW LF Response RPOW space space space space 4 LF 4 Watts of forward power 2 11 17 Operating Hours RF ON Query This command queries the total hours spent with the RF enabled Query OH Response Format OH hours LF hours The total hours with RF Enabled 0 to 100000 padded with spaces to always be 6 digits wide Example To query the RF On operating hours ...

Page 63: ... the fault log The fault log stores up to 200 of the most recent faults Each fault is tagged with a decimal number between 1 most recent and 200 oldest If the fault log exceeds 200 faults the oldest fault in the list will be cleared The number of total faults in the log can be queried using the Read Fault Count command Query FSTA LOG number number A decimal number between 1 and 200 representing th...

Page 64: ...put capability of this amplifier there is a built in safety mechanism while the Keylock switch is in the REMOTE position Once the RF ON command is issued it is necessary to continually communicate over any of the remote I O ports on a periodic basis This command sets and queries the remote operating timeout value in seconds Syntax ROPTO timeout timeout The seconds between 0 and 500 that the amplif...

Page 65: ...le To query the piggyback SBB firmware revision send the following command SBB LF Response SBB_SW_REV2 70 LF Firmware is v2 70 2 11 27 SBB Optical Firmware Query This command queries the firmware revisions groups of twenty of the SBB assemblies that are fiber optically connected to the MPB assembly If no fiber optically connected SBB assemblies are present an empty list is returned Syntax SBB grou...

Page 66: ... This command queries the serial number of the system Query SN Response Format number LF number The serial number of the amplifier 6 to 8 characters Example To query the serial number send the following command SN LF Response 1234567 LF Serial number is 1234567 ...

Page 67: ...fier assembly is approximately 49 dB at minimum attenuation The power detector is used to sense the input RF power and it increases the attenuation of the variable attenuator circuit if an input overdrive condition is detected 3 2 2 A2 Two Way Splitter The Two Way Splitter is a broadband splitter The input signal is split into two equal amplitude equal phase signals The amplitude of each signal is...

Page 68: ...y circuitry The RF coupling of the forward and reverse coupled ports is approximately 63 dB 3 2 7 A23 Detector The A23 Detector converts the RF signals from the bi directional coupler to a DC voltage for use in the automatic leveling sample ports and display circuitry 3 3 POWER SUPPLIES The Model 2500A225C contains seven switching power supplies The input voltage range to the power supply is 200 2...

Page 69: ...following functions Provides automatic level control of the amplifier s output when placed in ALC mode Limits RF input level to the amplifier when forward or reflected power levels exceed specified limits Drives forward and reflective indicators on the display panel 3 5 SAMPLE PORTS The signals appearing at the sample ports produce a level of approximately 3dBm at 2500W Both forward and reverse si...

Page 70: ...Model 2500A225C 46 Rev A ...

Page 71: ...speed up repairs The Model 2500A225C incorporates fault control and detection circuits including display panel indications that can expedite troubleshooting of the unit For a description of how these indications can be used to assist in troubleshooting the unit please see Section 4 4 Shipping instructions are as follows To return an item contact AR Customer Service for an RMA number and shipping i...

Page 72: ...suitable circuit but they can be easily damaged by improper troubleshooting or handling techniques Use caution when troubleshooting the LDMOS do not short the gate to the ground or to the drain CAUTION Use care when unpacking new LDMOS The LDMOS packaging should only be opened at Electrostatic Discharge ESD approved workstations by individuals who are familiar with the handling of LDMOS and other ...

Page 73: ...rom the 2500A225C and the power reflected back to it If the reflected power is very high with respect to the forward power this could indicate that the output coax cable is defective or that the load being driven has a high VSWR 4 4 2 The Unit Cannot Be Operated Remotely 1 Verify that the front panel key switch is set to the REMOTE position 2 Verify that the unit operates locally by setting the ke...

Page 74: ...erlock Fault from the front panel by using the RESET switch 4 If the Interlock Fault will not clear check for continuity in the External Interlock Circuit Pin 1 to Pin 8 in the connector which mate with J1 in the rear panel 5 Check the voltage on A14A3 J5 pin 13 it should be 0 1V 6 If the voltage on A14A3 J5 pin 13 is high check the interlock line to ground 4 3 4 2 AC Interlock Fault 1 In the even...

Page 75: ...ower supply output fails this output will go high 4 0V and inhibit the A1 preamp driver module 4 4 6 Amplifier Faults Schematic 10052651 for LV 10053509 for HV 1 The fault output of the Preamplifier Driver module A1 final modules A5 through A12 is sensed on A14A3 J5 pins 15 through 23 A fault will measure 0 1V Under normal operation these lines will measure 4 9V 2V 2 Verify the correct voltages to...

Page 76: ...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 troubleshooting PS1 J16 pins 1 and 2 5 0 V 0 5 V PS3 24 0 V 0 5 V PS1 J16 pin 5 15 0 V 0 5 V PS4 PS5 PS6 47 0 V 0 5 V PS1 J16 pin 8 15 0 V 0 5 V PS2 34 0 V 0 5 V 5 Check the voltage on the feed thru caps of the A1 Pre Amp Driver with the RF g...

Page 77: ...ests specified in the following sections 1 The Model 2500A225C s typical gain response at 0 dBm input and 20 dBm input is shown in Figures 4 1 and 4 2 The actual gain may vary considerably from that shown in Figure 4 1 but should be 63 dBm Figure 4 2 should be 66 dBm Figure 4 1 Typical Response at 0 dBm Input Figure 4 2 Typical Response at 20 dBm Input ...

Page 78: ...3 Typical A1 Pre Amplifier Driver Response 20dBm Input NOTE The A1 Pre Amplifier s response may differ considerably particularly in flatness from the typical responses shown in the Figure 4 4 The typical response for the A1 Pre Amplifier at maximum gain setting is shown in Figure 4 4 Figure 4 4 Typical A1 Pre Amplifier Driver Response 0dBm Input ...

Page 79: ...gain access to Final modules See Figure 4 5 Figure 4 5 2500A225C Right Side Modules A9 A12 Disconnect the green connectors the SMA input and output connectors and remove module top cover to access the four Phillips head screws holding the module in place See Figures 4 6 through 4 9 Figure 4 6 Connectors ...

Page 80: ...Model 2500A225C 56 Rev A Figure 4 7 SMA Module Input Figure 4 8 Final Module RF Output ...

Page 81: ...Model 2500A225C Rev A 57 Figure 4 9 RF Module Install new replacement module using new thermal pad P N 10051176 Tighten the four mounting screws in an X pattern to ensure even pressure ...

Page 82: ...Model 2500A225C 58 Rev A ...

Page 83: ...he device being upgraded 2 Unzip the AR Firmware Upgrade Utility and run the installer executable 3 After the installation completes unzip the model specific firmware and save it to a safe place on the hard drive do not rename the file The utility will ask for this file later 4 Run the AR Firmware Upgrade Utility and follow the instructions provided 5 Once the utility successfully connects click t...

Page 84: ...Model 2500A225C 60 Rev A ...

Page 85: ... 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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