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Related Manuals for ifi S251-2KWP
Summary of Contents for ifi S251-2KWP
- Page 1 OPERATING AND MAINTENANCE INSTRUCTIONS MODEL S251-2KWP WIDE BAND SOLID STATE AMPLIFIER DOCUMENT NUMBER S251-2KWPMNL 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 ...
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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... - Page 3 LIST OF FIGURES FIGURE DESCRIPTION PAGE S251-2KWP ILLUSTRATION ..............4 S251-2KWP 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 S251-2KWP SCHEMATIC DIAGRAM ............
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Page 4: Introduction
CONTENTS (For a typical Wide Band Amplifier ) Quantity Description High Power Wide Band Amplifier, Model S251-2KWP AC power line cord Operation and Instruction Manual, Doc. No. S251-2KWP 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 S251-2KWP Wide Band Amplifier is a Bench Top or rack mount amplifier providing 2000 Watts of RF power from 1000 MHz to 2500 MHz. 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 S251-2KWP. It is not intended to be a course of instruction for unqualified personnel. -
Page 8: Protection Circuits
Fault Reset when the amplifier cools to normal temperature levels. 4.3.2 Input Protection The S251-2KWP is designed to operate with less than a 0 dBm (1.0 mW) input signal however, to prevent overdriving 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 9 4.3.5 Mismatch Protection The S251-2KWP 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.
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Page 10: Status Indicators, Controls And Connectors
4.4 STATUS INDICATORS, CONTROLS AND CONNECTORS The S251-2KWP has various controls and status indicators, which are identified below and can be visually located on Figure 1.0, S251-2KWP Illustration and Figure 2.0, S251-2KWP 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 S251-2KWP 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.
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Page 12: Operating Instructions
4.4.2 S251-2KWP 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 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...
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Page 14: Turning On The Amplifier
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 . 4.5.4 Turning ON the Amplifier Page... - Page 15 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 FIGURE 7.0 – Pulsing the Amplifier (Typical) 1.) A pulse must be applied and meet the criteria to see any type of power of the amplifier. The Front panel display what parameters are being read. See Figure 7. If it does not meet the criteria No Signal or a Fault will display as shown in the figure below.
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Page 17: Data Sheets
4.6 DATA SHEETS Provided with each S251-2KWP 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 18: Principals Of Operation
5.1.2 Input Signal Levels The S251-2KWP 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 19: S251-2Kwp Schematic Diagram
5.2 FEATURES OF THE S251-2KWP AMPLIFIER The S251-2KWP amplifier is intended for applications requiring high gain and power output to 2000 Watts, over a wide range of frequencies, without tuning adjustments. The S251-2KWP amplifies an input signal source over the frequency range from 1000 MHz to 2500MHz and at a minimum gain of... -
Page 20: Optional Features
0 to 5 volts. 5.3.1 Automatic Level Control In this mode, the S251-2KWP 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 21: 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 22: Leveling Using The "Int' Mode
6.1.3 The 'EXT' or External Position The S251-2KWP 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 23: 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 S251-2KWP 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 24: 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 25 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...
- Page 26 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 27 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 28 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...
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Page 29: Maintenance And Servicing
Reverse Sample Ports Ports 8.3 EQUIPMENT RETURN PROCEDURE Should the S251-2KWP require repair or it is recommended that the reader follow the Equipment Return Procedure so the equipment can be repaired or calibrated and returned in an efficient and timely manner. - Page 30 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.
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Page 31: Amplifier Data Sheets
APPENDIX A AMPLIFIER DATA SHEETS Page...