Introduction – Bird Technologies 8329-300 User Manual

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Chapter 1

Introduction

This publication refers to the Tenuline Attenuator Model

8329-300. This chapter contains introductory information

including product specifications, items supplied, and acces-

sory items available.

Purpose and

Function

The Model 8329-300 Attenuator is a low-reflection resis-

tance network for application in reducing RF power by

known and controlled amounts. It is a self-contained instru-

ment that requires no external source of power (except if

blower equipped) or utility service. The radiator has rhom-

bic shaped cooling fins spaced evenly along its length for the

most efficient cooling. This attenuator is useful for lowering

a high input RF power to a level suitable for feeding into an

oscilloscope, frequency counter or similar device. The

attenuator is designed to match the most commonly used 50

ohm transmission line systems.

Description

Relying only on ambient air currents, this Tenuline

Attenuator will safely absorb, and dissipate harmlessly as

heat, up to 2000 watts of input power. When equipped with

an optional blower, Model BA-300, the increased air flow

will allow a doubling of the rated load capacity to 4000

watts. Over the frequency range of dc to 500 MHz, the

power output will be reduced by 30dB (99.9%) ±0.5dB. Up to

500 MHz, the input VSWR will not exceed 1.1 and the out-

put VSWR 1.15.

This attenuator is a passive device that is self-contained

and does not need any external source of power or utilities

to function. The exception would be the use of the optional

BA-300 blower for a higher cooling rate. The BA-300-115 re-

quires 115V at 50/60 Hz and the BA-300-230 requires 230V

at 50/60 Hz.

Dimensions

and Weight

This attenuator is 23-1/4"L x 7-1/8"W x 17-3/16"H (591 x 181

x 437mm). It has a net weight of 57 lbs. (26kg) and a ship-

ping weight of approximately 68 lbs. (31 kg). Equipped with

a blower assembly the net weight is 70.5 lbs. (32kg) and the

shipping weight is 85 lbs. (39kg).

Items

Supplied

The following items are supplied with the Model 8329-300.

LC Female connector - input end

N Female connector - output end