Ets-lindgren 3301B Active Rod & Field Antenna (Archived) User Manual

Model 3301B Active Rod & Field Antenna User Manual Archived 3/18/10

10 | Receiving Your Order This page intentionally left blank. Archived 3/18/10

Maintenance | 11 3.0 Maintenance 3.1 Maintenance Recommendations To ensure reliable and repeatable long-term performance, annual recalibration

12 | Maintenance This page intentionally left blank. Archived 3/18/10

Standard Configuration | 13 4.0 Standard Configuration • Adjustable monopole element • Antenna base with built-in preamplifier and an isolate

14 | Standard Configuration This page intentionally left blank. Archived 3/18/10

Specifications | 15 5.0 Specifications 5.1 Operational Specifications Frequency Range: 30 Hz to 50 MHz (maximum usable bandwidth) Low Frequen

16 | Specifications Saturation Indicator Impulse Response: The saturation indicator will properly indicate saturation for pulsed signals which fall

Specifications | 17 Batteries: The Model 3301B is supplied with two 6V sealed lead-acid batteries. The batteries will operate for approximately 10

18 | Specifications This page intentionally left blank. Archived 3/18/10

Principles of Operation | 19 6.0 Principles of Operation 6.1 Description The ETS-Lindgren Model 3301B electric field receiving antenna is com

ii | ETS-Lindgren L.P. reserves the right to make changes to any products herein to improve functioning or design. Although the information in this do

20 | Principles of Operation SATURATION INDICATOR The Saturation indicator is located above the power indicator. Readings should not be taken when

Principles of Operation | 21 The antenna rod terminal is directly connected to the high impedance gate of a field effect transistor. Do not lift

22 | Principles of Operation If both roll off switches are simultaneously set in the on position, the low frequency 3 dB roll of point will be appr

Power Circuitry | 23 7.0 Power Circuitry The Model 3301B is powered by two 6 VDC sealed lead-acid batteries. A battery charger is supplied with

24 | Power Circuitry The battery charger is protected against overcurrent by a 200 mA 250 VAC time-delay fuse. If it becomes necessary to replace t

Power Circuitry | 25 2. Locate the two fuses in their holders mounted on the circuit board, and replace the fuses. 3. Replace the bottom panel

26 | Power Circuitry This page intentionally left blank. Archived 3/18/10

Setup and Use | 27 8.0 Setup and Use The Model 3301B is designed for ease of use, and is designed for five accurate reading types in a variety

28 | Setup and Use 8.2 High Sensitivity Readings The Model 3301B is optimized to facilitate extremely sensitive readings. For best performance, a

Theory of Operation | 29 9.0 Theory of Operation 9.1 The Rod There are three factors of primary interest in understanding a rod antenna. Thes

| iii Table of Contents Safety Symbol Definitions ...

30 | Theory of Operation Finally, the interaction of the rod with the ground must be understood. The theoretical understanding of the rod assumes t

Theory of Operation | 31 It is the output impedance which determines the effective low frequency cutoff of the unit. The Model 3301B is still usa

32 | Theory of Operation high. However, the amplifier is being called upon to amplify signals at many frequencies simultaneously. In the time domai

The Antenna Factor | 33 10.0 The Antenna Factor The antenna factor data provided with the unit is simply a ratio of the field strength presente

34 | The Antenna Factor This page intentionally left blank. Archived 3/18/10

Antenna Impulse Response | 35 11.0 Antenna Impulse Response The Model 3301B is designed and optimized for the measurement of CW type signals. H

36 | Antenna Impulse Response In the same way, the antenna will not efficiently pass spectral components that fall below its bandwidth. For the Mod

Antenna Impulse Response | 37 begins to discharge through its resistance to ground. If the PRF is slow enough so that the capacitor is fully disc

38 | Antenna Impulse Response This page intentionally left blank. Archived 3/18/10

Calibration Procedure | 39 12.0 Calibration Procedure ETS-Lindgren recommends the equivalent capacitance method of calibration for the Model 33

iv | 9.0 Theory of Operation ... 29 9.1

40 | Calibration Procedure This page intentionally left blank. Archived 3/18/10

Warranty Policy for Standard EMCO Brand Products | 41 Appendix A: Warranty Policy for Standard EMCO Brand Products SCOPE AND DURATION OF WARRANT

42 | Warranty Policy for Standard EMCO Brand Products Warranty coverage does not include any defect or performance deficiency (including failur

Warranty Policy for Standard EMCO Brand Products | 43 MADE BY BUYER EXCEED THE PURCHASE PRICE OF THE PRODUCT IN RESPECT OF WHICH DAMAGES ARE CLAI

44 | Warranty Policy for Standard EMCO Brand Products This page intentionally left blank. Archived 3/18/10

European Community Declaration of Conformity | 45 Appendix B: European Community Declaration of Conformity The EC Declaration of Conformity is t

46 | European Community Declaration of Conformity This page intentionally left blank. Archived 3/18/10

Data and Illustrations | 47 Appendix C: Data and Illustrations PERIODIC RECTANGULAR PULSE TRAIN SPECTRUM OF RECTANGULAR PULSE Amplitudes and

48 | Data and Illustrations ALTERING PULSE WIDTH / PULSE REPETITION RATE The following figures A–D depict the effect of altering either the pulse w

Data and Illustrations | 49 ACTIVE ELECTRIC FIELD ANTENNA CALIBRATION FIXTURE Archived 3/18/10

| v Safety Symbol Definitions This product and related documentation must be reviewed for familiarization with safety markings and instructions prior

50 | Data and Illustrations ACTIVE ROD ANTENNA CALIBRATION SETUP Archived 3/18/10

Data and Illustrations | 51 TYPICAL CURVES—MINIMUM DISCERNIBLE SIGNAL AT VARIOUS BANDWIDTHS Archived 3/18/10

52 | Data and Illustrations TYPICAL ATTENUATION EFFECT FOR SWITCHES 1 AND 2 Archived 3/18/10

Data and Illustrations | 53 TYPICAL ROLL OFF CURVES FOR SWITCHES 3 AND 4 Archived 3/18/10

54 | Data and Illustrations TYPICAL ROLL OFF CURVES—41” ROD ANTENNA, 0 DB ATTENUATION Generator output 250 mV Archived 3/18/10

Data and Illustrations | 55 TYPICAL ROLL OFF CURVES—41” ROD ANTENNA, 10 DB ATTENUATION Generator output 250 mV Archived 3/18/10

56 | Data and Illustrations TYPICAL ROLL OFF CURVES—41” ROD ANTENNA, 30 DB ATTENUATION Generator output 8000 mV Archived 3/18/10

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Introduction | 7 1.0 Introduction The ETS-Lindgren Model 3301B is a broadband, high sensitivity electric-field receiving antenna. The Model 3301B

8 | Introduction This page intentionally left blank. Archived 3/18/10

Receiving Your Order | 9 2.0 Receiving Your Order 2.1 Unpacking and Acceptance Step 1. Upon delivery of your order, inspect the shipping cont