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A150
Broadband Power Amplifier
HIGH RF VOLTAGES MAY BE PRESENT AT THE OUTPUT OF THIS UNIT. All
operating personnel should use extreme caution in handling these voltages and be
thoroughly familiar with this manual.
Do not attempt to operate this unit prior to reading this manual.
The material contained in this document is the property of Electronics & Innovation Ltd., it is subject to
change without notice.
1
August 2012
Revision E
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Summary of Contents for E&I A150
- Page 1 A150 Broadband Power Amplifier HIGH RF VOLTAGES MAY BE PRESENT AT THE OUTPUT OF THIS UNIT. All operating personnel should use extreme caution in handling these voltages and be thoroughly familiar with this manual. Do not attempt to operate this unit prior to reading this manual.
- Page 2 Warranty Electronics & Innovation Ltd., (hereafter E&I) warrants for the period of three years from the date of original delivery, each unit to be free of defects in materials and workmanship. For the period of 36 months E&I will, at its option, repair or replace defective parts so as to render the unit fully operational such that it performs according to the original specifications;...
- Page 3 Chapter 1 Introduction The A150 is a broadband solid state amplifier covering the frequency spectrum from 300 KHz to 35 MHz. It is rated at 150 watts of RF power with low harmonic and intermodulation distortion. Over 200 watts of saturated power can be produced with increased distortion products.
- Page 4 Chapter 2 Operation 2.1 INTRODUCTION The A150 RF amplifier is used to amplify the RF level of signal sources in the 300 KHz to 35 MHz range. No tuning or any other form of adjustment is required. The A150 produces rated power output at its output connector, regardless of load impedance.
- Page 5 2.3.2 Front Panel Display The A150 front panel has a passive LCD display designed for simplicity and ease of use. During initialization, the LCD shows the software revision. After the amplifier is initialized, the LCD indicates Forward Power, Reflected Power, and amplifier status (see figure 2.1).
- Page 6 Field Service. 2.3.3 RS 232 Interface The A150 features a standard RS-232 serial interface suitable for connection to a PC or host system. The communication protocol is extremely simple to facilitate readback and control with readily available terminal programs such as Hyperterm.
- Page 7 Chapter 3 Technical Description 3.1 GENERAL DESCRIPTION The A150 is designed to amplify signals by 53 dB in the frequency band of 300 KHz to 35 MHz. The signal from the front panel BNC connector is fed via a length of 50 ohm coaxial cable into the input of the driver amplifier module.
- Page 8 Rev _in DC_ok_ret DC Status_ret DC Status PSU Enable ret PSU Enable Controller LCD1 Title A150 RF Amplifier 3200L RF Amplif ier Size Document Number A150 – SCH-01 3200L-SCH-01 1/12/05 Date: Sheet The material contained in this document is the property of Electronics & Innovation Ltd., it is subject to change without notice.
- Page 9 Chapter 4 Maintenance 4.1 INTRODUCTION The E&I A150 RF amplifier requires no periodic maintenance. The instrument is unconditionally stable and is fail-safe under all load conditions. Damage can only be externally caused by the incorrect selection of the AC supply voltage or by an input signal in excess of the specified 1 volt rms equivalent to a power level of 13dBm.
- Page 10 Performance limits quoted are for guidance only and should not be taken for guaranteed performance specifications unless they are also quoted in the Specification Section 1.2. 4.2 PERFORMANCE CHECKS To determine the amplifier’s performance carry out the following procedure. 4.2.1 Initial Check The following check can be made after repair and adjustments or whenever the condition of the unit is in question.
- Page 11 Set the sweep generator to the video sweep mode with the start frequency at 300 kHz and the sweep width to 35 MHz. Disconnect the A150 from the set-up and connect the sweep/generator RF output directly to the 30 dB attenuator.
- Page 12 Return sweep/generator output level to full deflection. Rotate the step attenuator (CCW) so that the output is reduced by 50 dB. Reconnect the A150 into the test set-up of Figure 4-1. Place the A150 power switch to the "ON" position.
- Page 13 harmonics is less than -25 dB with respect to the carrier while manually scanning the frequency band of 300 KHz to 35 MHz. An indicated power output of 125W should be maintained during this operation. PACKAGING FOR RESHIPMENT In the event of the equipment being returned for servicing it should be packed in the original shipping carton and packing material.
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