The material contained in this document is the property of Electronics & Innovation Ltd., it is subject
to change without notice.
February 2007 Page 3 of 17 Revision C
Chapter 1 Introduction
1.1
Introduction
The E&I Model 325LA is an all solid state amplifier which has a flat frequency response
from 250 kHz to 150 MHz. It provides up to 25W of linear power with low harmonic and
intermodulation distortion. Gain is 50 dB nominal, with variation of less than +/-1.5 dB
over the entire frequency range. Input and output impedances are 50
Ω
and the unit may
be driven to full power output by most RF synthesizers, signal generators and swept
signal sources.
The E&I Model 325LA will provide its rated forward power output into any load
impedance, regardless of match. It will absorb the power reflected from a mismatched
load without causing failure or oscillation.
Forward and reflected RF power is displayed on the front panel meter. The Model 325LA
is packaged for bench mounting and can be supplied with rack mounting adapters. It has
an integral power supply which operates from an 85 – 264 VAC 47 - 63 Hz main supply.
The Model 325LA will raise the power level of signal sources and generators without
requiring tuning or band-switching. The Class A linear circuitry will amplify signals of AM,
FM, SSB, TV and complex modulations, limited only by their peak input and bandwidth,
with minimum distortion.
1.2
Specifications
Physical and electrical specifications are listed in Figure 1.
1.3
Instrument Identification
Each amplifier is identified by a serial number tag on the back panel of the unit. Both the
model number and the serial number should be given in any correspondence with the
company.
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.
2.2 Mains Voltage Setting
The unit automatically adjusts to accommodate the available AC line voltage.
