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E&I 3100LA Quick Start Manual
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E&I 3100LA Quick Start Manual

Broadband power amplifier
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3100LA
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.

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Summary of Contents for E&I 3100LA

  • Page 1 3100LA 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: Table Of Contents

    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 General Information

    250 KHz to 150 MHz. It is rated at 100 watts of RF power with low harmonic and intermodulation distortion. 150 watts of saturated power can be produced with increased distortion products. A highly linear Class A design, the 3100LA will amplify inputs of AM, FM, SSB, pulse and any complex modulation signals. The amplifier has 50 dB gain, it is unconditionally stable and will not oscillate even with combinations of mismatched source and load impedance.

  • Page 4: Chapter 2 Operation

    Optional Rack Mount Ears Chapter 2 Operation 2.1 INTRODUCTION The 3100LA RF amplifier is used to amplify the RF level of signal sources in the 250 KHz to 150 MHz range. No tuning or any other form of adjustment is required.
  • Page 5 2.3.2 Front Panel Display The 3100LA 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 2.3.3 RS 232 Interface The 3100LA 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. The RS-232 link has the following parameters:...

  • Page 7: Technical Information

    Chapter 3 Technical Description 3.1 GENERAL DESCRIPTION The 3100LA is designed to amplify signals by 50 dB in the frequency band of 250 KHz to 150 MHz. The signal from the front panel N connector is fed via a length of 50 ohm coaxial cable into the input of the driver amplifier module.

  • Page 8: Maintenance

    Chapter 4 Maintenance 4.1 INTRODUCTION The E&I 3100LA 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 9 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. Connect AC power supply. Switch on power and observe that the display initializes. Connect a sweep generator (HP 8601 or similar) capable of sweeping the frequency range 250 KHz to 150 MHz, to the input connector.
  • Page 10 Set the sweep generator to the video sweep mode with the start frequency at 150 kHz and the sweep width to 150 MHz. Disconnect the 3100LA from the set-up and connect the sweep/generator RF output directly to the 30 dB attenuator.
  • Page 11 (CCW) so that the output is reduced by 50 dB. Reconnect the 3100LA into the test set-up of Figure 4-1. Place the 3100LA power switch to the "ON" position. Observe the gain versus frequency sweep on the oscilloscope.

  • Page 12: Chapter 5 Safety

    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. If this is not available, wrap the instrument in heavy paper or plastic and place in a rigid outer box of wood, fiberboard or very strong corrugated cardboard.