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Form 080/01
Complimentary Reference Material
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Summary of Contents for E&I 325LA
- Page 1 Complimentary Reference Material This PDF has been made available as a complimentary service for you to assist in evaluating this model for your testing requirements. TMG offers a wide range of test equipment solutions, from renting short to long term, buying refurbished and purchasing new. Financing options, such as Financial Rental, and Leasing are also available on application.
- Page 2 325LA 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 3 Warranty Electronics & Innovation Ltd., (hereafter E&I) warrants for the period of one year from the date of original delivery, each unit to be free of defects in materials and workmanship. For the period of 12 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 4 Chapter 2 Operation 2.1 Introduction The E&I 325LA RF amplifier is used to increase the RF output level of signal sources in the 0.25 to 150 MHz range. No tuning or any other form of adjustment is required. Mains Voltage Setting The unit automatically adjusts to accommodate the available AC line voltage.
- Page 5 The Mains Fuse Fl is located on the rear panel. The replacement part number is F981-ND Rack Installation In order to install the Model 325LA in a standard 19 inch relay rack, the mounting brackets must be attached to the cover as follows: Remove the four feet on the underside of the amplifier if the minimum vertical usage of the relay rack is necessary.
- Page 6 2.8 Front Panel Display The 325LA front panel has a passive LCD display designed for simplicity and ease of use. During initialization, the LCD shows the software revision. Pf:___W Pr:___W Status:________ Figure 2.1 : Front Panel Display After the amplifier is initialized, the LCD indicates Forward Power, Reflected Power, and amplifier status (see figure 2.1).
- Page 7 Flow control: none An example configuration using HyperTerminal on a PC is shown in figure 2.2. Figure 2.2: Example RS-232 setup using Hyper Terminal In the default state, the RS-232 port will echo the same information sent to the front panel LCD display, allowing a running datalog to be stored to disk using the capture feature of the terminal program.
- Page 8 Chapter 3 Technical Description 3.1 GENERAL DESCRIPTION The E&I Model 325LA is a linear Class A amplifier capable of increasing the output of any signal generator, frequency synthesizer, sweep generator or laboratory signal source from 250 kHz to 150 MHz. The Model 325LA is completely protected against damage due to load mismatch provided that the input RF level does not exceed 1 VRMS or 1.4V peak.
- Page 9 Precautions The input and output of the Model 325LA should not be connected together. This will cause oscillation and may damage the input preamplifier. When the input signal voltage of the signal source is unknown, insert an attenuator between it and the Model 325LA input.
- Page 10 Chapter 4 Maintenance Introduction The E&I 325LA RF amplifier requires no periodic maintenance. The instrument is unconditionally stable and is fail safe under all load conditions. Damages can only be externally caused by an input signal in excess of the specified IV RMS maximum.
- Page 11 NB: Removal of the cover voids the warranty! The E&I Model 325LA amplifier is housed in an aluminum chassis. A block diagram schematic is illustrated in figure 4. The cover can be removed by releasing the 6 M3 screws on the side of the unit.
- Page 12 Appendix: Figures Figure 1 325LA Specifications Figure 2 Front and Rear View Figure 3 Gain Test Set-Up Figure 4 Harmonic Test Set-Up Figure 5 Block Diagram The material contained in this document is the property of Electronics & Innovation Ltd., it is subject to change without notice.
- Page 13 Figure 1: 325LA Specification: Frequency Coverage: 250 kHz to 150 MHz Gain: 50 dB Gain Variation: ±1.5 dB Maximum Class A Linear Output: All harmonics more than 23 dB below main signal at 20W output; lower at Harmonic Distortion: reduced power output.
- Page 14 Figure 2 The material contained in this document is the property of Electronics & Innovation Ltd., it is subject to change without notice. February 2007 Revision B...
- Page 15 Figure 5 Power Power Sweep 150 KHz – 300 20 dB Attenuator Figure 4 Power Spectrum Sweep 150 KHz – 300 20 dB Attenuator The material contained in this document is the property of Electronics & Innovation Ltd., it is subject to change without notice.
- Page 16 DC Status_ret DC Status PSU Enable ret PSU Enable Controller LCD1 Title 325LA RF Amp Size Document Number 325LA-SCH-01 Date: Tuesday , July 05, 2005 Sheet The material contained in this document is the property of Electronics & Innovation Ltd., it is subject to change without notice.
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