AR 250S1G6C Operating And Service Manual
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AR 250S1G6C Operating And Service Manual

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Operating and
Service Manual
250S1G6C
Model
10051311
Part Number
Serial Number
160 Schoolhouse Road, Souderton, PA 18964 • 215-723-8181 • Fax 866-859-0582 • www.arworld.us

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Summary of Contents for AR 250S1G6C

  • Page 1 Operating and Service Manual 250S1G6C Model 10051311 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 Power Supplies ....................... 1 Specifications ......................1 Installation ......................1 1.4.1 Location ........................1 1.4.2 Power ........................2 OPERATING INSTRUCTIONS ................ 5 General ........................5 Amplifier Front and Rear Panels ................
  • Page 16 Model 250S1G6C 2.10.3 Fiber-Optic Serial Communications ..............28 2.10.4 USB Communications ..................28 2.10.5 Ethernet Communications ..................29 2.11 Remote Commands ....................29 2.11.1 Power On / Off ..................... 30 2.11.2 RF On/Off ......................30 2.11.3 RF Gain Adjust ..................... 30 2.11.4 RF Gain Query .....................
  • Page 17 Dual Directional Coupler Removal Procedure (Rear Output) ......64 A.3.1 Dual Directional Coupler Re-Installation Procedure (Rear Output) ....68 FIGURES Model 250S1G6C Front Panel ................6 Model 250S1G6C Rear Panel ................6 Rear Panel 7-16 DIN Connector ................8 Align Connectors for Interface ................10 Placement of Wrenches on Connector ..............
  • Page 18 Model 250S1G6C...

  • Page 19: General Information

    Select an operating location that will permit air to circulate freely around the amplifier’s cabinet. The Model 250S1G6C 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 1.4.2 Power The Model 250S1G6C is designed to operate using AC primary power of 100-240 Volts Alternating Current (VAC), 47–63 Hz single phase, 1750 watts maximum. CAUTION: Dangerous voltages are present in the Model 250S1G6C whenever the unit is plugged into an AC outlet.
  • Page 21 Amplifiers Model 250S1G6C The Model 250S1G6C is a solid-state, This is a multiple purpose amplifier. The Class A design, self-contained, air- low level of spurious signals and cooled, broadband power amplifier linearity make it ideal for use as a driver...
  • Page 22 Model 250S1G6C • 250 W • 1.0 - 6.0 GHz Electrical Specifications Parameter Symbol Minimum Typical Maximum Unit Rated Power Output (1.0 – 6.0 GHz) PSAT >425 Input for Rated Output Power Output @ 3 dB Compression P3dB >400 Power Output @ 1 dB Compression P1dB >375...
  • Page 23 Model 250S1G6C • 250 W • 1.0 - 6.0 GHz Mechanical Specifications Parameters Unit 50.3 x 47 x 65.3 Dimensions (With Cabinet) (W x H x D) 19.8 x 18.5 x 25.7 48.3 x 44.5 x 65.3 Dimensions (No Cabinet) – 10U for 19” Rack 19.0 x 17.5 x 25.7...
  • Page 24 Connector Enclosure RF Sample Ports Front Enclosure Front Rear No Enclosure Rear Contact your AR RF/Microwave Instrumentation Sales Associate for specific model configuration pricing. Envelope Drawing AR RF/Microwave Instrumentation • 160 Schoolhouse Rd, Souderton, PA 18964 • 215-723-8181 • info@arworld.us •...
  • Page 25 Model 250S1G6C • 250 W • 1.0 - 6.0 GHz TYPICAL PSAT POWER @ 0dBm INPUT TYPICAL POWER @ P3dB COMPRESSION AR RF/Microwave Instrumentation • 160 Schoolhouse Rd, Souderton, PA 18964 • 215-723-8181 • info@arworld.us • www.arworld.us • ISO 9001:2015 Certified •...

  • Page 26: Power

    Model 250S1G6C • 250 W • 1.0 - 6.0 GHz TYPICAL POWER @ P1dB COMPRESSION TYPICAL SMALL SIGNAL GAIN @ -20dBm INPUT AR RF/Microwave Instrumentation • 160 Schoolhouse Rd, Souderton, PA 18964 • 215-723-8181 • info@arworld.us • www.arworld.us • ISO 9001:2015 Certified •...
  • Page 27 Model 250S1G6C • 250 W • 1.0 - 6.0 GHz TYPICAL 2 HARMONICS @ 200 W AR RF/Microwave Instrumentation • 160 Schoolhouse Rd, Souderton, PA 18964 • 215-723-8181 • info@arworld.us • www.arworld.us • ISO 9001:2015 Certified • ISO 17025:2017 Accredited...
  • Page 28 TYPICAL NOISE FIGURE 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 250S1G6C 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: Amplifier Front And Rear Panels

    Model 250S1G6C AMPLIFIER FRONT AND REAR PANELS Figure 2-1 shows the front panel of the Model 250S1G6C Broadband Microwave Amplifier. Figure 2-2 shows the rear panel of the Model 250S1G6C Broadband Microwave Amplifier. Figure 2-1. Model 250S1G6C Front View Item...

  • Page 31: Interface Identification

    Model 250S1G6C 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. 2.3.1 Local Controls The control panel located on the front of the amplifier allows for local control and status monitoring using the controls listed below.

  • Page 32: Inputs And Outputs

    Model 250S1G6C 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 33 Model 250S1G6C 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 34: Align Connectors For Interface

    Model 250S1G6C 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 35: Placement Of Wrenches On Connector

    Model 250S1G6C Figure 2-5. Placement 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.

  • Page 36: Ieee-488, Usb, And Rs-232 Interfaces

    Model 250S1G6C 2.4.3 IEEE-488, USB, and RS-232 Interfaces The Model 750S1G6C’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 37: Local User Interface

    Model 250S1G6C 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 values and settings will be different on the actual amplifier depending on user settings and operating conditions.

  • Page 38: Main Menu Screen

    Model 250S1G6C 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 39: Select Screen

    Model 250S1G6C 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 40: User Screen

    Model 250S1G6C 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, the piggy-back assembly firmware is listed. At the bottom of the screen, 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).

  • Page 41: Vswr Limit Screen

    Model 250S1G6C 2.6.8 VSWR Limit Screen The VSWR Limit screen is used to set a software limit on the calculated output VSWR. If the calculated output VSWR exceeds the selected limit, a fault will be triggered, and the RF Output will be disabled.

  • Page 42: Gpib Address Screen

    Model 250S1G6C 2.6.10 GPIB Address Screen The 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.

  • Page 43: Key Beep Screen

    Model 250S1G6C 2.6.12 Key Beep Screen The Key Beep screen allows the user to turn on or off the audible beep that occurs when a valid touch event takes place. This setting is only stored in volatile memory and will be lost when power to the unit is cycled.

  • Page 44: Fault Screen

    Model 250S1G6C 2.6.14 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.

  • Page 45: Control States

    Model 250S1G6C Remotely, the ALC Lockout state affects the Level Adjust and the Mode Select commands. In the locked state, the Level Adjust command for ALC Threshold, Detector Gain, and Response Time are simply ignored. This is also true of the Mode Selection. These commands can be issued to the amplifier while in the locked state, but their associated values will not change regardless of the Keylock position.

  • Page 46: Power Off, Rf Off

    Model 250S1G6C 2.7.1 Power OFF, RF OFF AC power is applied, the Keylock in not INHIBIT. The control system is waiting for a user action or a remote command. 2.7.2 Power ON, RF OFF The Power button has been pressed or the remote command for ‘Power On’ has been sent.

  • Page 47: Control Lines

    Model 250S1G6C 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 48 Model 250S1G6C 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 49: Fault Definition

    Model 250S1G6C 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 50: No-Fault Control Actions

    Model 250S1G6C 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 51: 2.10 Remote Control Interfaces

    Model 250S1G6C 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 52: 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, so a fiber-optic cable is needed with ST connectors on one end and SMA connectors on the other.

  • Page 53: 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 54: Power On / Off

    Model 250S1G6C 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 55: Power Indicator Frequency

    Model 250S1G6C 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 56: Alc Mode

    Model 250S1G6C 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 57: Alc Response Setting Adjust

    Model 250S1G6C 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 58: Machine State Query

    Model 250S1G6C 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_thresh>, Response Format: RESP=<resp><LF> The RF Gain setting (0-100%), padded with leading spaces to be 3 characters <rf_gain>: <det_gain>:...

  • Page 59: Amplifier State Query

    Model 250S1G6C 2.11.14 Amplifier State Query This command queries the state of the amplifier. STATE? Query: STATE=<space><char1><char2><char3><char4><LF> Response Format: <char1> - <char4>: ASCII character (0 to 9 or A to F) representing a hexadecimal character To query the state of the amplifier, send the following command: Example: STATE?<LF>...

  • Page 60: Forward Power Query

    Model 250S1G6C 2.11.14.1 Hex Character to Binary Bits conversion table Below is a table that can be used as a reference when deciphering the response from the STATE query. The binary bits of each of the four ASCII characters from the response can be located here.

  • Page 61: Reverse Power Query

    Model 250S1G6C 2.11.16 Reverse Power Query This command queries the internally detected reverse power (values are corrected and linearized).. RPOW? Query: RPOW=<power><LF> Response Format: The detected reverse power (0-99999) in Watts (value is always five <power>: characters, padded with spaces).

  • Page 62: Reset Faults

    Model 250S1G6C 2.11.20 Reset Faults This command clears a resettable fault. A fault can only be cleared if the underlying issue that created the fault has been resolved. RESET Syntax: None Parameters: Example To clear a reported fault, send the following command: RESET<LF>...

  • Page 63: Clear Fault Log

    Model 250S1G6C 2.11.23 Clear Fault Log Use this command to clear the entire contents of the error log. This action is permanent and cannot be undone. FSTA:LOG:CLEAR Syntax: None Response Format: To clear the entire fault log, send the following command: Example: FSTA:LOG:CLEAR<LF>...

  • Page 64: Sbb (Piggyback) Firmware Query

    Model 250S1G6C 2.11.26 SBB (Piggyback) Firmware Query This command queries the firmware of the piggyback SBB assembly. *SBB? Query: SBB_SW_REV<revision><LF> Response Format: Where: x is the firmware revision. The revision of the SBB assembly. <revision>: Example: To query the piggyback SBB firmware revision, send the following command: *SBB?<LF>...

  • Page 65: Default Values

    Model 250S1G6C 2.11.29 Default Values These commands define the default values of the system settings listed below. The default value is what will be used upon AC mains power-on. Not all settings listed below are available on all models. DEFAULT:LEVEL:GAIN<value>...
  • Page 66 Model 250S1G6C Rev E...

  • Page 67: Theory Of Operation

    3. THEORY OF OPERATION INTRODUCTION The Model 250S1G6C RF amplifier consists of a 1–6 GHz RF amplifier assembly. The RF amplifier assembly consists of a Pre-Amplifier (Pre-Amp), one (1) Quadrature-Coupled Amplifier (Quad Amp) used as a driver, one (1) High power Quad Amp, (1) 4-Way Splitter, (4) High power Quad Amp, (1) 4-way Combiner and Directional Coupler assembly.

  • Page 68: A3, A5-A8 Quad Amp, High Power

    Model 250S1G6C 3.2.3 A3, A5-A8 Quad Amp, High Power The power module operates on a dual supply of VGG = -8V and VDD = +24V, with a VDD draw of 11.5 amps and VGG draw below 0.1 amps. Power-on sequence is to apply VGG first, and then VDD, reversing this sequency for power-off.

  • Page 69: Control System

    Model 250S1G6C CONTROL SYSTEM 3.4.1 A16 ALC Board (Schematic 10023927) This section describes the operation of the level control board. The level control board performs the following functions: • Provides automatic level control of the amplifier’s output when the amplifier is placed in the ALC mode.
  • Page 70 Model 250S1G6C Rev E...

  • Page 71: Maintenance

    4. MAINTENANCE GENERAL MAINTENANCE INFORMATION The Model 250S1G6C requires very little maintenance since it is a relatively simple instrument. It is built with etched circuit wiring and solid-state devices that will ensure long, trouble free life. However, should trouble occur special care must be taken in servicing to avoid damage to the devices or the etched circuit board.

  • Page 72: Troubleshooting

    GaAs FETs and other ESD-sensitive devices. Troubleshooting the Model 250S1G6C 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

    RF energy when these doors are opened. NOTE: The Model 250S1G6C is shipped with a mating connector, which has a jumper between Pins 1 and 8, installed in the rear panel interlock connector. The unit will not operate unless the interlock circuit is closed.

  • Page 74: Power Supply Faults (Schematic 10050406)

    Model 250S1G6C 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 J3 in the rear panel). 5. Check the voltage on A7 J5, pin 30; it should be < 0.01V.

  • Page 75: Alc Fault

    Model 250S1G6C 4.3.8 ALC Fault 1. Indication – ALC 2. As stated previously, the power limit controls could not limit either the forward or reverse power to the preset threshold. This can be a transient type of problem, if the fault can be cleared. If the fault cannot be cleared with no RF input drive power, then there is a malfunction in the ALC board or associated circuit.

  • Page 76: Low Or No Power Output (Rf Test) (Diagram 10049979)

    1. The Model 250S1G6C’s typical gain response at -20 dBm input and 0 dBm input is shown in Figure 4-1 and Figure 4-2. The actual gain may vary considerably from that shown in these Figures but should be ≥ 32 at -20dBm input and ≥...

  • Page 77: Typical Response @ 0 Dbm Input

    Model 250S1G6C Figure 4-2. Typical Response at 0 dBm Input 2. Typical Response of the A1 Pre-Amp (see Figure 4-3). Figure 4-3. Typical Pre-Amp Response Rev E...

  • Page 78: Typical A2 Quad Amp Driver Response

    Model 250S1G6C 3. The Typical response for the A2 Quad Amp Driver is shown in Figure 4-4. Figure 4-4. Typical A2 Quad Amp Driver Response 4. The Typical response for the A Pre-Amp and A2 Quad Amp Driver is shown in Figure 4-5.

  • Page 79: Typical A3 Quad Amp Gain Response

    Model 250S1G6C 5. The Typical gain response for the A3 Quad Amp is shown in Figure 4-6. Figure 4-6 Typical A3 Quad Amp Gain Response Rev E...
  • Page 80 Model 250S1G6C Rev E...
  • Page 81 AR’s facility or at one of AR’s authorized distributor locations. If you wish to have AR or one of our distributors perform these procedures, contact AR’s Customer Service Department at 215.723.0275 or service@arworld.us.

  • Page 82: Removal And Re-Installation Of The Dual Directional Coupler

    Model 250S1G6C A.1 REMOVAL AND RE-INSTALLATION OF THE DUAL DIRECTIONAL COUPLER The procedures in this section detail the removal and re-installation of the dual directional coupler. Section A.2 is for Front Output units and Section A.3 is for Rear Output units. Be sure to follow the proper procedure.
  • Page 83 Model 250S1G6C Figure 2 4. Carefully disconnect the Forward and Reverse SMB connections from the ALC board. 5. With a 5/16” wrench, carefully loosen the blue coaxial cables SMA connections from the front panel. 6. Observe the connection between the directional coupler and combiner (Figure 3).
  • Page 84 Model 250S1G6C 9. Carefully remove the two top midframe bracket screws (Figure 5). Figure 5 10. Carefully remove the two bottom midframe bracket screws (Figure 6). This will allow separation of the right side of the front panel and the midframe.
  • Page 85 Model 250S1G6C 11. Carefully pull back on the front panel to disengage the directional coupler from the combiner (Figure 7). Figure 7 12. Firmly support the body of the directional coupler and remove the four directional coupler front panel screws (Figure 8).

  • Page 86: Dual Directional Coupler Re-Installation Procedure (Front Output)

    Model 250S1G6C Figure 9 A.2.1 Dual Directional Coupler Re-Installation Procedure (Front Output) 1. Carefully reconnect all attenuators, filters, and detectors to their proper port location and position. 2. Re-install top and bottom mounting plates to directional coupler. Pay close attention to the direction of coupler before re-installation into the amplifier.
  • Page 87 Model 250S1G6C 10. Carefully inspect all connections for proper location and ensure all connectors are properly secure. Loose connections will result in inadequate amplifier performance and may damage associated components. 11. Re-install right side and top covers. 12. Re-install amplifier inside of cabinet enclosure.

  • Page 88: Dual Directional Coupler Removal Procedure (Rear Output)

    Model 250S1G6C A.3 DUAL DIRECTIONAL COUPLER REMOVAL PROCEDURE (REAR OUTPUT) 1. Carefully remove amplifier from cabinet enclosure. 2. Remove both the top and right side covers to expose the Directional Coupler/Combiner assembly (Figure Figure 1 3. Take careful note of the connections between the rear panel sample ports, directional coupler and ALC board (Figure 2).
  • Page 89 Model 250S1G6C 4. With a 5/16” wrench, carefully disconnect the white SMA to SMB cables Forward and Reverse ports of the coupler (Figure 3). Figure 3 5. With a 5/16” wrench, carefully loosen the blue coaxial cables SMA connections from the rear panel. Leave coaxial cables connected to coupler.
  • Page 90 Model 250S1G6C 8. Ensure that the 7-16 male connection is completely unthreaded from the directional coupler (Figure 5). Figure 5 9. With a 11/32” wrench, loosen the four combiner bracket nuts. The two front nuts are displayed in Figure 6 below.
  • Page 91 Model 250S1G6C 11. Firmly support the body of the directional coupler and remove the four directional coupler rear panel screws (Figure 7). Figure 7 12. Carefully remove dual directional coupler, attached hardware and cables from amplifier. 13. Calibrate dual directional coupler with all attenuators, filters, detectors, and cables attached and in their proper location.

  • Page 92: Dual Directional Coupler Re-Installation Procedure (Rear Output)

    Model 250S1G6C A.3.1 Dual Directional Coupler Re-Installation Procedure (Rear Output) 1. Carefully position the directional coupler inside the amplifier. Pay close attention to the direction of coupler before re-installation into the amplifier. The INPUT (J1) of the directional coupler will be connected to the combiner.
  • Page 93 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.
  • Page 94 Model 250S1G6C Rev E...

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