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AR 2500A225C Operating And Service Manual

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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 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...
  • Page 3 REGULATION (EC) 1907/2006 of the European Parliament and of the Council of 18 December 2006 concerning the Registration, Evaluation, Authorization and Restriction of Substances of Very High Concern Chemicals (SVHC) Supporting documentation is held by AR RF/Microwave Instrumentation’s Quality department in Pennsylvania, United States. Place of issue:...
  • Page 5 Instructions for European EMC Conformity WARNING It is the responsibility of the user of this equipment to provide electromagnetic shielding, filtering and isolation which is necessary for EMC compliance to Directive 2014/30/EU. The equipment must therefore be operated in a shielded area which provides a sufficient level of attenuation to meet the radiated emissions and immunity specifications.
  • Page 7 The caution symbol denotes a potential hazard. Attention must be given to the statement to prevent Your AR equipment may have more than one power supply cable. Use damage, destruction, or harm. only approved power cable(s). If you have not been provided with a Dangerous voltages are present.
  • Page 8 EQUIPMENT CONTAINING LASERS risk of serious injury due to unsafe AR Field Probes (FL/PL Series) and Field Analyzers (FA product handling should be a fundamental Series) are Class 1 laser products containing embedded consideration every user.
  • Page 9 Zur Vermeidung von Personen- oder Sachschäden gilt BEVOR SIE DAS GERÄT ANSCHLIESSEN es, die Hinweise zu beachten. Ihre AR-Ausrüstung hat möglicherweise mehr als ein Stromversorgungskabel. Gefährliche elektrische Spannungen sind vorhanden. Verwenden Sie nur zugelassene Stromkabel. Falls Sie kein Stromkabel oder Höchste Vorsicht ist geboten.
  • Page 10 Die meisten Geräte müssen während des Versands, der Montage und des Gebrauchs LASER-INFORMATION transportiert werden. Jeder Nutzer sollte sich AR - Feldsonden (FL/PL-Serie) und Feldanalysatoren (FA-Serie) über das Risiko von schweren Verletzungen sind Laserprodukte der Klasse 1 mit eingebetteten Klasse-4- durch unsachgemäße...
  • Page 11 électrode de mise à la Votre équipement AR peut disposer de plus d’un câble d’alimentation terre de protection. électrique. Utilisez uniquement un ou des câbles d’alimentation approuves.
  • Page 12 éliminer le risque injustifié de blessures causées par le levage est fournie par les méthodes de travail de NIOSH (publication Les sondes de champ AR (série FL/PL) et les analyseurs de n° 94-110) disponibles sur : champ (série FA) sont des produits laser de classe 1 contenant des lasers intégrés de classe 4.
  • Page 13 Er zijn gevaarlijke elektrische spanningen aanwezig. Wees uiterst voorzichtig. VOOR HET OPZETTEN VAN DE STROOM Uw AR-apparatuur kan meer dan een netvoedingskabel bezitten. Gebruik alleen goedgekeurde netvoedingskabel(s). Koopt een Wijst op een terminal aan die bedoeld is voor aansluiting netvoedingskabel die is goedgekeurd voor gebruik in uw land als u...
  • Page 14 APPARAAT DAT LASERS BEVAT distributie, de assemblage en het gebruik moeten worden behandeld, moet het risico AR-terreinsondes (FL/PL-serie) en terreinanalysatoren (FA- op ernstig letsel als gevolg van een serie) zijn laserproducten van klasse 1 met ingesloten onveilige behandeling van het product een klasse 4-lasers.

  • Page 15: Table Of Contents

    TABLE OF CONTENTS TABLE OF CONTENTS ....................i GENERAL INFORMATION ................1 General Description ....................1 Specifications ......................1 Installation ......................1 1.3.1 Location ........................1 1.3.2 Primary Power ......................2 OPERATING INSTRUCTIONS ................ 5 General ........................5 Control and Indicator Functions ................6 Interface Identification ...................
  • Page 16 Model 2500A225C Control States ....................... 24 2.7.1 Power OFF, RF OFF .................... 24 2.7.2 Power ON, RF OFF ....................24 2.7.3 Power ON, RF ON ....................24 Control Lines ......................25 2.8.1 Switch Breakout Board (A14A3) ................. 25 2.8.1.1 Connector J9 ....................25 2.8.1.2...
  • Page 17 Locating and Replacing Modules ................. 55 Appendix A. Installing Software Upgrades ..............59 FIGURES 2500A225C AC Line Cord Installation ..............2 Model 2500A225C Front Panel ................6 Model 2500A225C Rear Panel ................7 Rear Panel 7-16 DIN Connector ................9 Align Connectors for Interface ................
  • Page 18 Model 2500A225C...

  • Page 19: General Information

    Select an operating location that will permit air to circulate freely around the amplifier’s cabinet. The Model 2500A225C utilizes air cooling and should be located where the normal flow of 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.
  • Page 20 VAC, 50/60Hz, three phase Delta (4-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).
  • Page 21 Amplifiers Model 2500A225C The Model 2500A225C is a solid-state, Standard RF sample ports allow for Class A design, self-contained, air- forward and reverse power monitoring. cooled, broadband power amplifier This is a high-power Class A amplifier. Features: designed for applications where...
  • Page 22 Model 2500A225C • 2.5 kW • .01-225 MHz Electrical Specifications Parameter Symbol Minimum Typical Maximum Unit Rated Power Output (0.01 - 100 MHz) PSAT 2500 2800 >3000 Rated Power Output (100 – 225 MHz) PSAT 2000 2300 >2500 Input for Rated Output Power Output @ 3dB Compression (0.01 –...
  • Page 23 Model 2500A225C • 2.5 kW • .01-225 MHz Absolute Maximum Rating Exceeding any of the limits listed here may result in permanent damage to the device. Parameter Minimum Typical Maximum Unit RF Drive ∞ RF Load VSWR RF Load Reflected Will operate without damage or oscillation when connected to any load impedance without the aid of foldback circuitry.
  • Page 24 Model 2500A225C • 2.5 kW • .01-225 MHz Connector interfaces Function Type N – female (50 Ω) RF input 7-16 DIN female (50 Ω) RF output IEEE-488 24-pin female RS-232 9-pin subminiature D female RS-232 (fiber optic) USB 2.0 Type B...
  • Page 25 Model 2500A225C • 2.5 kW • .01-225 MHz TYPICAL OUTPUT POWER (LINEAR FORMAT) 5000 4500 4000 3500 3000 2500 2000 1500 1000 Freq. (MHz) P1dB P3dB P@0dBm Input TYPICAL OUTPUT POWER (LOG FORMAT) 5000 4500 4000 3500 3000 2500 2000...

  • Page 26: Primary Power

    Model 2500A225C • 2.5 kW • .01-225 MHz TYPICAL SMALL SIGNAL GAIN @ -20dBm INPUT 73.5 70.5 67.5 64.5 61.5 Freq. (MHz) TYPICAL HARMONICS @ 1750 WATTS Freq. (MHz) AR RF/Microwave Instrumentation • 160 Schoolhouse Rd, Souderton, PA 18964 •...
  • Page 27 Freq. (MHz) AR RF/Microwave Instrumentation • 160 Schoolhouse Rd, Souderton, PA 18964 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: 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 •...

  • Page 29: Operating Instructions

    2. OPERATING INSTRUCTIONS GENERAL Operation of the Model 2500A225C broadband amplifier is quite simple. The amplifier’s input signal, whether swept or fixed in frequency, is fed into the jack marked RF INPUT, and the amplifier’s output signal is taken from the jack labeled RF OUTPUT. The unit is turned on by activating the front panel POWER switch. In the event of a major malfunction, protection is provided by a circuit breaker located on the unit’s rear panel.

  • Page 30: Control And Indicator Functions

    Model 2500A225C CONTROL AND INDICATOR FUNCTIONS The Model 2500A225C’s front panel is shown in Figure 2-1; the unit’s rear panel features are detailed in Figure 2-2. Figure 2-1. Model 2500A225C Front Panel Item Title Function INHIBIT, LOCAL, REMOTE Keylock Switch, 3-position; key removal in INHIBIT position only...

  • Page 31: Interface Identification

    Model 2500A225C Figure 2-2. Model 2500A225C Rear Panel INTERFACE IDENTIFICATION This section describes all external interfaces used to operate the amplifier via the control software. A Local/Remote switch on the front panel can allow control from the Local Controls or Remote Communications Ports.

  • Page 32: Power Button

    Model 2500A225C 2.3.1.2 POWER Button The momentary POWER button turns the main power to the amplifier on and off. The status of the green light- emitting diode (LED) in the switch indicates whether the amplifier’s power is on or off. The main power supply fans are active when power is on.

  • Page 33: Inputs And Outputs

    Model 2500A225C INPUTS AND OUTPUTS The input and output connectors described in the following sections are located on the unit’s front or rear panels; refer to the Front and Rear Panel features drawings (Figure 2-1, Figure 2-2). 2.4.1 RF Input This Type N connector is the RF input to the amplifier.
  • Page 34 Model 2500A225C 2.4.2.1.1 Center Conductor Inspection Index Description New Condition Normal Use-Slight gap Bent pin section-Discard connector Fingers spread or collapsed-Discard connector Broken pin or pin section-Discard connector 2.4.2.1.2 Center Pin Concentricity Index Description Centered Maximum allowable off-center Fall-off center-Discard connector 2.4.2.1.3...

  • Page 35: Mating 7-16 Din Connectors

    Model 2500A225C 2.4.2.1.4 Cleaning Procedure 1. Remove loose particles on the mating surfaces, threads, and similar surfaces using low-pressure compressed air. Avoid forcing dirt down into the connector by applying the forced air at a slight angle. 2. Use only isopropyl alcohol 90% for cleaning the connector parts. Clean the threads of the connector with a narrow-tipped lint-free cotton swab dampened with isopropyl alcohol 90%.

  • Page 36: Torquing 7-16 Din Connectors

    Model 2500A225C 2.4.2.3 Torquing 7-16 DIN Connectors For proper connection to the RF output connector a torque of 221 in-lbs. (24.97 N-m) shall be used. Using the two wrenches, place one wrench on the flats of the connector body and the other wrench on the flats of the nut to be tightened as shown.

  • Page 37: Ieee-488, Usb, And Rs-232 Interfaces

    2.4.3 IEEE-488, USB, and RS-232 Interfaces The Model 2500A225C’s remote interfaces allow remote control, via a computer, of all amplifier functions (except for the Keylock Switch position) that can be controlled from the front panel. When the amplifier is in the Remote mode (as determined by the position of the Keylock Switch), a special Remote display is shown.

  • Page 38: Amplifier Operation

    Model 2500A225C AMPLIFIER OPERATION 2.5.1 Local Operation 1. Connect the input signal to the unit’s RF INPUT connector. The input signal level should be 0dBm maximum. 2. Connect the load to the unit’s RF OUTPUT connector. 3. Set the REMOTE/LOCAL switch to LOCAL.

  • Page 39: Local User Interface

    Model 2500A225C LOCAL USER INTERFACE This section describes the user interface used during local operation of the amplifier as it pertains to the control system. 2.6.1 Menu Map Below is a menu map for the amplifier. 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.

  • Page 40: Main Menu Screen

    Model 2500A225C 2.6.3 Main Menu Screen The Main Menu screen is only available when the Keylock switch is in the LOCAL position. At the top of the screen is a blue bar graph and associated number that can represent either the RF Gain, ALC Threshold, ALC Detector Gain, or ALC Response value.

  • Page 41: Select Screen

    Model 2500A225C 2.6.4 Select Screen The Select 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 what parameter the ADJUST knob can adjust. Once a selection is made, the screen will automatically change back to the Main Menu screen.

  • Page 42: User Screen

    Model 2500A225C 2.6.6 User Screen The User screen presents the user with the revision levels of all the firmware that is running on all the main control system components. For the Switch Breakout Board (SBB) assemblies, only the piggy-back assembly firmware is listed.

  • Page 43: Power Indicator Frequency Screen

    Model 2500A225C 2.6.8 Power Indicator Frequency Screen The Power Indicator Frequency screen allows the user to enter the current test frequency and improve the accuracy of the forward and reverse power indicators using a factory-installed look-up table. The black text at the top of the screen represents the current setting. The grey text shown inside the black box represents the new desired frequency and will update while entering a new value using the keypad.

  • Page 44: I/O Screen

    Model 2500A225C 2.6.10 I/O Screen The I/O screen is used to present the user with menu options pertaining to the remote I/O ports found on the rear of the unit and the interaction with the touch screen. These options include the GPIB address, RS- 232/Fiber-Optic Serial Baud Rate, and key beep.

  • Page 45: Rs-232/Fiber-Optic Serial Baud Rate Screen

    Model 2500A225C 2.6.12 RS-232/Fiber-Optic Serial Baud Rate Screen The RS-232/Fiber-Optic Serial Baud Rate screen is used to select the baud rate used by both the RS-232 serial port and the Fiber-Optic serial port. To get here from the Main Menu, touch the User menu button followed by the I/O menu button and finally the Serial menu button.

  • Page 46: Remote Screen

    Model 2500A225C 2.6.14 Remote Screen When the Keylock switch is set to the REMOTE position the Remote screen appears. This screen has all the same information as the Main Menu screen except that the blue bar graph and associated value are only for the RF Gain value.

  • Page 47: Alc Lockout Feature

    Model 2500A225C 2.6.16 ALC Lockout feature The ALC lockout feature allows users to lock all ALC settings and remain in the ALC Internal Mode regardless of a power cycle. Under normal operating conditions these settings can be changed at any time and reset with a power cycle.

  • Page 48: Control States

    Model 2500A225C CONTROL STATES This section defines the various control software states required for this amplifier. An example of typical control states is shown below. The subsections below, define any special responsibilities of the control system. One example would be to state that when transitioning from the RF ON state to the POWER OFF state, care must be taken to remove the bias voltage from the power modules before disabling the main power supplies.

  • Page 49: Control Lines

    Model 2500A225C CONTROL LINES This section defines all required control lines to be utilized by the control software and any actions (faults or alerts) that the control software must perform. In the tables below, indicate the NO ACTION STATES (or the correct operating states) of each line required and any actions that are required if the line is out of bounds.

  • Page 50: Connector J5

    Model 2500A225C 2.8.1.3 Connector J5 Lines 3, 4: Supplies +3.3 Vdc via a 10kOhm pull-up resistor Lines 1-4: Guaranteed operation up to +30 Vdc Lines 3, 4: 0 Vdc or +3.3 Vdc TTL Inputs & OD Outputs: Guaranteed operation up to +5 Vdc...

  • Page 51: Fault Definition

    Model 2500A225C FAULT DEFINITION This section is used to define all faults that can occur and their source. Use the Control Line column to define what active control line generates the fault or use the text Internal for an internally generated fault from the control system (i.e., Internal 485 bus error).

  • Page 52: Fault Control Actions

    Model 2500A225C 2.9.1 No-Fault Control Actions This section describes all no-fault actions taken by the controls system and their sources. Use the Control Line column to define what active control line generates the fault or use the text Internal for an internally generated fault from the control system (i.e., Internal 485 bus error).

  • Page 53: 2.10 Remote Control Interfaces

    Model 2500A225C 2.10 REMOTE CONTROL INTERFACES This section describes remote operation of the amplifier using the provided General Purpose Interface Bus (GPIB), RS-232 serial port, fiber-optic serial ports, Universal Serial Bus (USB), and Ethernet port. All ports are always active; however, only one port may be used at a time.

  • Page 54: Fiber-Optic Serial Communications

    Core Size: 50um (minimum) to 200um (recommended) Connector Type: 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 uses SMA connectors, a fiber-optic cable is needed with ST connectors on one end and SMA connectors on the other.

  • Page 55: Ethernet Communications

    Once installed, the DeviceInstaller™ utility will scan the network and find all connected Lantronix Ethernet devices. This list of found devices will include any connected AR Ethernet devices. By selecting one of the connected devices from the list, its IP address and subnet mask can be changed along, with several other settings.

  • Page 56: Power On/Off

    Model 2500A225C 2.11.1 Power On/Off This command controls the power state. No other command will be accepted until the POWER:ON command has been issued. It is good practice to wait a minimum of two (2) seconds before polling the status after issuing the POWER:ON command.

  • Page 57: Power Indicator Frequency

    Model 2500A225C 2.11.5 Power Indicator Frequency This command sets the current frequency used to correct the forward and reverse power indicators shown on the display. The correction factors used by this feature are set from the factory and stored in non-volatile memory.

  • Page 58: Alc Mode

    Model 2500A225C 2.11.7 ALC Mode This command sets the mode of the Automatic Leveling Control (ALC) feature to either a default mode (MANUAL) or a user-configurable mode (ALC INT). In the default mode (MANUAL), the ALC Detector Gain, ALC Response, and ALC Threshold settings do not affect the operation of the ALC feature because factory settings are used instead.

  • Page 59: Alc Response Setting Adjust

    Model 2500A225C 2.11.10 ALC Response Setting Adjust This command sets the ALC response setting. Adjusting this setting changes the ALC’s response time when reacting to a detected increase in the RF Output that exceeds the ALC Threshold Level. LEVEL:RESP<resp setting>...

  • Page 60: Machine State Query

    Model 2500A225C 2.11.13 Machine State Query This command queries the RF gain, detector gain, ALC threshold, and ALC response time. MSB? Query: RF<space>GAIN=<rf_gain>,DT<space>GAIN=<det_gain>,THRES=<alc_th Response Format: resh>,RESP=<resp><LF> The RF Gain setting (0-100%), padded with leading spaces to be 3 characters <rf_gain>: <det_gain>:...

  • Page 61: Hex Character To Binary Bits Conversion Table

    Model 2500A225C Each hexadecimal character represents a 4-bit binary number, allowing for a total of 16 binary flags that can be used to indicate various states of the amplifier. The definition of what each bit of information represents can be found in the Amplifier State Response Table below. For help converting the ASCII characters into binary bits, see the Hex Character to Binary Bits table.

  • Page 62: Forward Power Query

    Model 2500A225C 2.11.15 Forward Power Query This command queries the internally detected forward power (values are corrected and linearized). FPOW? Query: FPOW=<power><LF> Response Format: The detected forward power (0-99999) in Watts (value is always five <power>: characters, padded with spaces).

  • Page 63: Faults Query

    Model 2500A225C 2.11.19 Faults Query This command queries information about a currently active fault. FSTA? Query: FSTA=<space><status><LF> Response Format: A hexadecimal number (0000 to FFFF), padded with zeros to always be 4 <status>: characters wide. Example: To query the fault status, send the following command: FSTA?<LF>...

  • Page 64: Read Fault Log Count

    Model 2500A225C 2.11.22 Read Fault Log Count Use this command to query the total number of faults currently stored in the fault log. FSTA:LOG:COUNT? Query: <count><LF> Response Format: A decimal number between 0 and 200 <count>: Example: To query the fault log count, send the following command: FSTA:LOG:COUNT?<LF>...

  • Page 65: Alc Board Firmware Query

    Model 2500A225C 2.11.25 ALC Board Firmware Query This command queries the firmware of the ALC board assembly. *ALC? Query: ALC_SW_REV<revision><LF> Response Format: The revision of the ALC Board. <revision>: Example: To query the ALC Board firmware revision, send the following command: *ALC?<LF>...

  • Page 66: System Serial Number Query

    Model 2500A225C 2.11.28 System Serial Number Query This command queries the serial number of the system. Query: <number><LF> Response Format: The serial number of the amplifier (6 to 8 characters). <number>: Example: To query the serial number, send the following command: SN?<LF>...

  • Page 67: Theory Of Operation

    3. THEORY OF OPERATION INTRODUCTION The Model 2500A225C RF amplifier consists of a .01-225 MHz RF amplifier assembly. The RF amplifier assembly consists of a pre-amplifier/driver module, and a two-way splitter that feeds (2) four-way splitters to drive (8) final amplifier modules. These 8 final amplifier modules are combined through (1) eight-way combiner to yield a combined power of 2500 watts or more.

  • Page 68: A13 Eight-Way Combiner

    POWER SUPPLIES The Model 2500A225C contains seven switching power supplies. The input voltage range to the power supply is 200–240 VAC, 50/60Hz. The AC input power is approximately 8500 watts. PS1 is a multiple output supply. PS1 has a +5V, standby supply for the A14 control panel, the A15 remote interface board used for the remote interfaces, the -15V supplied to the A1 preamp, the A2 driver module and the A5-A12 final modules.

  • Page 69: Control System

    Model 2500A225C CONTROL SYSTEM 3.4.1 A14 Control/Fault Board The A14 Control/Fault board consists of one 16-bit microcontrollers and several other ICs that monitor and indicate the status of the amplifier. Power is supplied using only a single 5-volt power supply. The board offers...
  • Page 70 Model 2500A225C Rev A...

  • Page 71: Maintenance

    Section 4.4. Shipping instructions are as follows. To return an item, contact AR Customer Service for an RMA number and shipping instructions. Returns from outside the United States are not permitted without prior authorization. If shipping from outside of the United States, closely follow all directions on the RMA form for return shipping and marking.

  • Page 72: Cooling System

    LDMOS and other ESD-sensitive devices. Troubleshooting the Model 2500A225C 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.

  • Page 73: General - Reading Faults

    If the fault does not clear with the RF drive off, some other problem exists in the amplifier. The digital control panel of the 2500A225C indicates the output power from 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.

  • Page 74: Interlock Fault

    RF energy when these doors are opened. NOTE: The Model 2500A225C is shipped with a mating connector, which has a jumper between Pins 1 and 8 and 10 and 14, installed in the rear panel interlock connector. The unit will not operate unless the interlock circuit is closed.

  • Page 75: Power Supply Faults (Schematic 10052651 For Lv, 10053509 For Hv)

    Model 2500A225C 4.4.5 Power Supply Faults (Schematic 10052651 for LV, 10053509 for HV) 4.4.5.1 PS1 and PS2 Fault The PS1 power supply does not have a fault line. Operation must be verified manually checking both AC input and DC output. The AC input should be between 200-240 VAC and DC outputs will be J18 Pins 1 and 2 =+5 VDC, Pin 5= +15 VDC, Pin 8= -15 VDC.

  • Page 76: Low Or No Power Output (Dc Tests) (Schematic 10052651 For Lv, 10053509 For Hv)

    Low or No Power Output (DC Tests) (Schematic 10052651 for LV, 10053509 for HV) All indicators on the Model 2500A225C are normal, the front panel display reads RF On, and the cooling fans are operating. 1. Check the position of the RF Gain control—is it set to maximum gain? 2.

  • Page 77: Low Or No Power Output (Rf Test)

    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.

  • Page 78: Typical A1 Pre-Amplifier Response -20 Dbm Input

    Model 2500A225C 2. The typical response for the A1 Pre-Amplifier/Driver (at maximum gain setting) is shown in Figures 4-3 and 4-4. Figure 4-3. 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.

  • Page 79: Locating And Replacing Modules

    LOCATING AND REPLACING MODULES Remove rack enclosure left side panels to 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.

  • Page 80: Sma Module Input

    Model 2500A225C Figure 4-7. SMA Module Input Figure 4-8. Final Module RF Output Rev A...

  • Page 81: Rf Module

    Model 2500A225C 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. Rev A...
  • Page 82 Model 2500A225C Rev A...

  • Page 83: Appendix A. Installing Software Upgrades

    Appendix A. Installing Software Upgrades The 2500A225C has the capability to upgrade software. The first step that should be taken is to power-down the unit from the front panel. 1. Go to the AR Website and download the AR Firmware Upgrade Utility along with the model specific upgrade file for the device being upgraded.
  • Page 84 Model 2500A225C Rev A...
  • Page 85 These modules are not field-repairable and should never be opened outside of AR’s Microelectronics Lab. The modules in these product lines have a security label on two sides of the modules between the housing and lid/cover. If the security label is removed and or cut, the warranty of the module will be voided.

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