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ifi S251-250 Operating And Maintenance Instructions Manual

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OPERATING AND MAINTENANCE
WIDE BAND SOLID STATE AMPLIFIER
Prepared by:
INSTRUCTIONS
MODEL S251-250
DOCUMENT NUMBER
S251-250MNL V1.0
Instruments for Industry
903 South Second Street
Ronkonkoma, NY 11779
Phone: 631 467-8400
Fax:
631 467-8558
Email:
info@ifi.com

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Summary of Contents for ifi S251-250

  • Page 1 OPERATING AND MAINTENANCE INSTRUCTIONS MODEL S251-250 WIDE BAND SOLID STATE AMPLIFIER DOCUMENT NUMBER S251-250MNL V1.0 Prepared by: Instruments for Industry 903 South Second Street Ronkonkoma, NY 11779 Phone: 631 467-8400 Fax: 631 467-8558 Email: info@ifi.com...

  • Page 2: Table Of Contents

    TABLE OF CONTENTS SECTION DESCRIPTION PAGE INTRODUCTION...................4 GENERAL DESCRIPTION ................5 AC Connection and Set-Up ..............5 WARRANTY INFORMATION ..............6 GENERAL INFORMATION Scope Of This Manual ................7 General Specifications ................7 Protection Circuits ................8 Status Indicators, Controls and Connectors ........10 Operating Instructions ...............13 Data Sheets ..................17 PRINCIPALS OF OPERATION Proper Usage And Warnings .............18...
  • Page 3 LIST OF FIGURES FIGURE DESCRIPTION PAGE S251-250 ILLUSTRATION ................4 S251-250 REAR PANEL ILLUSTRATION ..........10 FRONT PANEL DISPLAY START-UP MENU ......... 13 GPIB ADDRESS MENU................14 MAIN MENU STATUS DISPLAY ............. 15 TURNING ON THE AMPLIFIER ............... 16 S251-250 SCHEMATIC DIAGRAM ............19...

  • Page 4: Introduction

    CONTENTS (For a typical Wide Band Amplifier ) Quantity Description High Power Wide Band Amplifier, Model S251-250 AC power line cord Operation and Instruction Manual, Doc. No. S251-250 Amplifier Data Sheets (Included with Unit) FIGURE 1.0...

  • Page 5: General Description

    SECTION 2.0 GENERAL DESCRIPTION The Instruments for Industry, Inc. (IFI) manufactured S251-250 Wide Band Amplifier is a Bench Top or rack mount amplifier providing 250 Watts of RF power from 800 MHz to 2500 MHz instantaneously. The Amplifier features a Color Touchscreen that displays continuous forward and reflected power in three-digit metering.

  • Page 6: Warranty Information

    This warranty is the full extent of obligation and liability assumed by IFI with respect to any and all IFI products. IFI neither makes, nor authorizes any person to make, any other guarantee or warranty concerning IFI Products.

  • Page 7: General Information

    4.1 SCOPE OF THIS MANUAL This manual is intended to inform a qualified transmitter operator or technician of the normal operating and maintenance procedures for the S251-250. It is not intended to be a course of instruction for unqualified personnel.

  • Page 8: Protection Circuits

    Should an over heating condition occur, either through component failure or by a restricted airflow, the S251-250 contains heat sensors that will shut down the system. As a result, the air inlet and outlet openings should be free of obstructions for proper cooling of the amplifier. Operation is restored after Fault Reset when the amplifier cools to normal temperature levels.
  • Page 9 4.3.5 Mismatch Protection The S251-250 is designed to operate with a tuned 50 Ohm load and should any mismatching of the 50 Ohm load occur, the Reverse Power, also called Reflective Power, will increase producing a high VSWR.

  • Page 10: Status Indicators, Controls And Connectors

    4.4 STATUS INDICATORS, CONTROLS AND CONNECTORS The S251-250 has various controls and status indicators, which are identified below and can be visually located on Figure 1.0, S251-250 Illustration and Figure 2.0, S251-250 Rear Panel Illustration. A narrative description for the function and purpose of each control and status indicator is provided within paragraphs 4.4.1 and 4.4.2.
  • Page 11 4.4.1 S251-250 PANEL STATUS INDICATORS INDICATOR FUNCTION FAULT INDICATOR The Fault indicator displays a fault when either a Thermal, Power Supply or Module Fault occurs on Front panel display. Some units may have Green Status LED Indicators in addition to the Controller Display.
  • Page 12 4.4.2 S251-250 CONTROLS CONTROL FUNCTION Local When depressed, the amplifier is restored to the local control from the GPIB mode of control. ALC Switch The optional Automatic Leveling Control (ALC) is a feature, which selects the method for leveling, either internal, external or manual.

  • Page 13: Operating Instructions

    Apply power to the unit using the front panel ON/OFF switch. When the circuit breaker or AC Power On switch is energized, An IFI Splash Screen will be displayed after the Microprocessor (MPU) booting cycle this whole process will be about 45 seconds. The Screen in Figure 3.0 will...
  • Page 14 4.5.3 - Entering the GPIB Address FIGURE 4.0 - GPIB ADDRESS The GPIB Address can be changed by selecting the GPIB Button . Pressing the Button will scroll through the numbers There are 31 numbers 1 through 31 . Page...

  • Page 15: Turning On The Amplifier

    4.5.4 Turning ON the Amplifier FIGURE 5.0 – MAIN MENU AND STATUS DISPLAY (Typical) The amplifiers status can be monitored using the Main Menu. The Gain (GAIN), Total Hours Operating Hours, Amplifier and Base Plate Temperature, STATUS and Faults, Forward (FWD) and Reflected (RFL) Status are continuously displayed.

  • Page 16: Data Sheets

    4.6 DATA SHEETS Provided with each S251-250 are specific Amplifier Data Sheets measured from the amplifier using a calibrated 50 Ohm Pad to assist the operator in maximizing the performance of the Wide Band Amplifier. The Amplifier Data Sheets are provided with each amplifier exhibiting the actual metering indication required to produce rated power output as indicated on the data sheet.

  • Page 17: Principals Of Operation

    5.1.2 Input Signal Levels The S251-250 is designed to operate with less than a 0 dBm ( 1.0 mW ) input signal however, to prevent over driving the amplifier, the Input Protection circuit will activate if the input signal exceeds 3 dBm ( 2.0 mW ) and will automatically compensate for the increased input signal by reducing the...

  • Page 18: S251-250 Schematic Diagram

    5.2 FEATURES OF THE S251-250 AMPLIFIER The S251-250 amplifier is intended for applications requiring high gain and power output to 200 Watts, over a wide range of frequencies, without tuning adjustments. The S251-250 amplifies an input signal source over the frequency range from 800 MHz to 2500M Hz and at a minimum gain of 53dB FIGURE 7.0...

  • Page 19: Optional Features

    5.3.1 Automatic Level Control In this mode, the S251-250 serves as the voltage comparator and variable gain stage. It will enable the maintenance of a constant RF voltage vs. frequency at the input to an imperfect load or a virtually constant E-Field at a measurement point in space.

  • Page 20: Automatic Leveling Control (Alc )

    SECTION 6.0 AUTOMATIC LEVELING CONTROL 6.1 ALC FEATURES The Automatic Leveling Control (ALC) switch located on the front panel has three positions, 'INT', 'OFF' and 'EXT'. Described below are the features of each position Important Note: Figures 5.0 and 6.0 indicates the display for a typical amplifier and the ALC option is indicated however if the amplifier is not equipped with this option, the ALC option will not be displayed.

  • Page 21: Leveling Using The "Int' Mode

    6.1.3 The 'EXT' or External Position The S251-250 serves as the voltage comparator and variable gain stage. It will enable the maintaining of a constant RF voltage vs. frequency at the input to an imperfect load or a virtually constant E-Field at a measurement point in space.

  • Page 22: Leveling Using The 'Ext' Mode

    Connect the ALC on the rear panel to the detected output port on the remote detector. Connect the remote detector in series with the S251-250 output and at the input to the load. The system is now ready for operation. Amplitude adjustments can be made with the level control as in manual operation.

  • Page 23: Ieee-488 Interface Option

    IEEE-488.2 Standard is implemented, which defines the protocols and syntax of commands. The GPIB command codes for the IFI Amplifier series are discussed on subsequent pages and, for ease of identification; the command codes are identified within the text by bold capital characters. For full information on the IEEE protocols and syntax the IEEE-488.2 Standard should be consulted.
  • Page 24 Commands for Solid State Amplifier Code Amplifier Function STBY Standby & Returns ‘SB’ OPRT Operate & Returns ‘ON’ RESET Fault Reset & Returns ‘STANDBY’ ATTUxx Increase Attenuation (xx- # of steps) [Response with Gain value, ‘GAIN: XXXXX %’] ATTDxx Decrease Attenuation (xx- # of steps) [Response with Gain value, ‘GAIN: XXXXX %’] REQUEST STATUS Code AMPLIFIER STATUS...
  • Page 25 REQUEST AMPLIFIER STATUS (POWER AND METERING) CODE Amplifier FUNCTION POWERFWD Returns Forward Power Value in Watts, ‘POWER FWD: XXXXX W’ POWERRFL Returns Reflected Power Value in Watts, ‘POWER RFL: XXXXX W’ PS1V Returns Power Supply 1 Volts Value in Volts, ‘PWRSPLYV1: XXXXX V’ PS1I Returns Power Supply 1 Current Value in Amps, ‘PWRSPLYI1: XXXXX A’...
  • Page 26 RS-232 or USB Operation of Serial Port on RF Amplifier 1 – Connect serial port of amplifier to computer using a null modem cable or a standard serial cable with a null modem adapter. 2 – Use a program such as Hyperterm to communicate with the amplifier. (To reach “Hyperterm”...
  • Page 27 5 – When used with an RS-232 or RS-422 interface each character that is sent to the amplifier is echoed back. RS-422 Communication Interface Communication Standard RS422 Communication Baud Rate 19200 Communication Update Rate 50 Hz Average Data Latency 100 mSec Data Latency Variation 100 mSec Control Functions...

  • Page 28: Maintenance And Servicing

    MAINTENANCE AND SERVICING 8.1 PERIODIC MAINTENANCE The only periodic maintenance required on the S251-250 amplifier system is ensuring that the cooling vents are not obstructed in such a manner that the airflow is restricted. Periodic cleaning of the vents may be required depending on the degree of dust in the atmosphere.
  • Page 29 Page...

  • Page 30: Equipment Return Procedure

    In many cases, a faulty accessory could give the illusion that the equipment itself has failed. For this reason it is important to return all the accessories with the equipment. It is also IFI's policy to verify performance of all associated accessories of Section 1.0 before returning the equipment to service.

  • Page 31: Amplifier Data Sheets

    APPENDIX A AMPLIFIER DATA SHEETS Page...
  • Page 32 APPENDIX B DRAWINGS S251-250 BILL OF MATERIALS (BOM) 901031 INTERCONNECT, S251-250 Page...
  • Page 33 Bill of Materials Fiished Good Product Description Lot# Build Qty Rev Ltr S251-300 SSA, 0.8-2.5 GHz, 300W Level Product Code Component Product Description Qty Req'd Revision Designation Seq# Manufactor Info / Notes S251-300 0I-901014 INTERCONNECT DIAGRAM - S2505-300, 200 S251-300 0O-850052 OUTLINE DRAWING - SMX100 S251-300...
  • Page 34 Bill of Materials Fiished Good Product Description Lot# Build Qty Rev Ltr S251-300 SSA, 0.8-2.5 GHz, 300W Level Product Code Component Product Description Qty Req'd Revision Designation Seq# Manufactor Info / Notes S251-300 800101-06 CABLE - RF - EZ FLEX .141 - SMA/M-SMA/M S251-300 800101-07 CABLE - RF - EZ FLEX .141 SMA/M SMA/M...
  • Page 35 Bill of Materials Fiished Good Product Description Lot# Build Qty Rev Ltr S251-300 SSA, 0.8-2.5 GHz, 300W Level Product Code Component Product Description Qty Req'd Revision Designation Seq# Manufactor Info / Notes S251-300 DIV-2W500M2500M500 POWER DIVIDER/COMBINER - 2 WAY - COAXIAL - 500- 2500MHZ - 500W CW , N FEMALE, IL=0.4dB S251-300 DIV-ZFRSC-42+...
  • Page 36 Bill of Materials Fiished Good Product Description Lot# Build Qty Rev Ltr S251-300 SSA, 0.8-2.5 GHz, 300W Level Product Code Component Product Description Qty Req'd Revision Designation Seq# Manufactor Info / Notes S251-300 TER-STR-8-141 TERMINAL STRIP-BLOCK DOUBLE - 0.438 SPACING - 20A - #14 AWG - 8 POS.
  • Page 37 GND6 J3 FAN 3 J3 FAN 3 S3-3 GND LUG TEMP IN J3-1 CHECKED BY: CHECKED BY: CHECKED BY: S251-250 PA, RF BLOCK S251-250 PA, RF BLOCK S251-250 PA, RF BLOCK +48VDC3 J3-2 ATTACHED SENSOR 4 SENSOR 4 GND10 S4-1...
  • Page 38 6/1/2017 6/1/2017 6/1/2017 LINE LINE NEUT 500540-1 500540-1 TITLE TITLE TITLE -12V PS5 GND-AUX S251-250 PS INTERCONNECT NOTE: CHANGE R2 TO 270 OHM NEUT NEUT CHECKED BY: CHECKED BY: CHECKED BY: +5V-AUX POW-ECS45US12 POW-ECS45US12 +12V-AUX APPROVED BY: APPROVED BY: APPROVED BY:...

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