ETS-Lindgren 3301C User Manual
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ETS-Lindgren 3301C User Manual

Active monopole antenna
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Model 3301C
Active Monopole Antenna
User Manual
Model 3301C Antenna Base

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Summary of Contents for ETS-Lindgren 3301C

  • Page 1 Model 3301C Active Monopole Antenna User Manual Model 3301C Antenna Base...
  • Page 2 ETS-Lindgren L.P. reserves the right to make changes to any product described herein in order to improve function, design, or for any other reason. Nothing contained herein shall constitute ETS-Lindgren L.P. assuming any liability whatsoever arising out of the application or use of any product or circuit described herein.

  • Page 3: Table Of Contents

    Rechargeable AA Nickel-Metal Hydride batteries (8) ......10   MIL-STD-461F Test Kit ................ 10   4-TR Light Tripod (Optional) ................ 11   ETS-Lindgren Product Information Bulletin ..........12 2.0 Maintenance ............... 13     Battery Replacement ................... 13   Annual Calibration ..................16  ...
  • Page 4   Alarm DIP Switches ................40   Change DIP Switch Settings..............41   Charging the Batteries ................. 42 7.0 Calibrating the Model 3301C ..........43     Calibration Steps ..................43   Example of Antenna Factor Calculation ............45  ...

  • Page 5: Notes, Cautions, And Warnings

    Warning: Denotes a hazard. Failure to follow instructions could result in SEVERE personal injury and/or property damage. Included text gives proper procedures. See the ETS-Lindgren Product Information Bulletin for safety, regulatory, and other product marking information. General Notices This equipment has been tested and found to...
  • Page 6 This page intentionally left blank.

  • Page 7: Introduction

    The Model 3301C is designed to provide reception of an electric field in a signal band without tuning or band switching from 30 Hz to 50 MHz. The 3 dB roll off points for the antenna factor are at 170 Hz and 30 MHz.

  • Page 8: Standard Configuration

    111 dB nominal at mid-band. In addition, at 10 dB and 30 dB (+/-10%), internal attenuators enable the Model 3301C to be used in fields up to 25 V/m, expanding the dynamic range to 141 dB. A saturation indicator provides an alert to the need for internal attenuators.

  • Page 9: Monopole Element

    ONOPOLE LEMENT The monopole element includes these parts for assembly:  (1) 116474 Rod section without antenna adapter  (1) 116474 Rod section with antenna adapter  (1) 116862 Center section The monopole may be assembled as follows:  For a finished length of 40.95 in (1040 mm)—Assemble all parts, including the 116862 center section.

  • Page 10: Counterpoise

    The Model 3301C is shipped with 8 Nickel-Metal Hydride (NiMH) batteries installed. The batteries are rechargeable, and include an AC adapter for charging. You must charge the batteries before using the Model 3301C for the first time. See Charging the Batteries on page 42 for more information.

  • Page 11: 4-Tr Light Tripod (Optional)

    4-TR Light Tripod (Optional) ETS-Lindgren offers the non-metallic, non-reflective 4-TR Light Tripod for use at both indoor and outdoor EMC test sites.  Constructed of linen phenolic and delrin, designed with an adjustable center post for precise height adjustments. Maximum height is 1.00 m (39.37 in), and minimum height is...

  • Page 12: Ets-Lindgren Product Information Bulletin

    ETS-Lindgren Product Information Bulletin See the ETS-Lindgren Product Information Bulletin included with your shipment for the following:  Warranty information  Safety, regulatory, and other product marking information  Steps to receive your shipment  Steps to return a component for service ...

  • Page 13: Maintenance

    Before performing any maintenance, follow the safety information in the ETS-Lindgren Product Information Bulletin included with your shipment. Maintenance of the Model 3301C is WARRANTY limited external components such as cables or connectors. Clean the exterior of the cabinet using a damp cloth and mild cleaner.
  • Page 14 Turn over the Model 3301C antenna base and place it on a stable surface with the bottom facing up. Use a Phillips screwdriver to remove the eight screws from around the perimeter of the base, and then lift the lid to remove it from the base.
  • Page 15 Insert one new battery into each battery holder, matching the –/+ –/+ on the battery with the on the board. Slide the end of the battery into the appropriate end of the holder, and then press the – end of the battery down until the entire battery is secure in the holder.

  • Page 16: Annual Calibration

    See the Product Information Bulletin included with your shipment for information on ETS-Lindgren calibration services. Replacement and Optional Parts ETS-Lindgren may substitute a similar part or new part number with the same functionality for another part/part number. Contact ETS-Lindgren for questions about part numbers and ordering parts.

  • Page 17: Service Procedures

    Part Description Part Number MIL-461F Test Kit 113359 3301C Calibration Fixture 3301CAL Tripod,Non-Conductive,1M,Light 4-TR,1ML Service Procedures For the steps to return a system or system component to ETS-Lindgren for service, see the Product Information Bulletin included with your shipment. Maintenance...
  • Page 18 This page intentionally left blank. Maintenance...

  • Page 19: Specifications

    3.0 Specifications Operational Specifications Frequency Range: 30 Hz to 50 MHz (maximum usable bandwidth) Low Frequency Roll Off: The low frequency roll off is switch-selectable to be 3 dB down at 22 kHz, 1.9 kHz, or 170 Hz. High Frequency Roll Off: Antenna factor is 3 dB down at 30 MHz Antenna Factor: ...

  • Page 20: Table Of Acceptable Pulse Repetition Rates

    Saturation Indicator The saturation indicator will properly Impulse Response: indicate saturation for pulsed signals which fall within the following boundaries:  The product of the pulse width to pulse repetition rate must be greater than 0.003.  The pulse repetition rate must be less than value listed for the applicable duty cycle.

  • Page 21: Electrical Specifications

    Electrical Specifications Output Impedance: 50 Ω (nominal) BNC Connector: For 50-Ω cable Physical Specifications Size:  Length: 19.05 cm (7.5 in)  Width: 19.05 cm (7.5 in)  Height: 8.89 cm (3.5 in)  Weight (Antenna base only): 1.4 kg (3.1 lb) Tripod Mounting: 1/4–20 hole on the base Monopole Element:...

  • Page 22: Ac Adapter & Battery Specifications

    AC Adapter & Battery Specifications Battery:  Rechargeable AA Nickel-Metal Hydride batteries (8)  2000 mAH recommended Battery Charge Time: Approximately 3.5 hours, depending on charge level of batteries Battery Operating Time Approximately 30 hours (Typical): Input Rating: Nominal 90–265 VAC 50/60 Hz Adapter Output Power: º...

  • Page 23: Assembly Instructions

    28. Counterpoise and Monopole Element The counterpoise is designed to be placed on top of the Model 3301C. This prevents the body of the unit from intruding into the field to be measured. Do not lift the Model 3301C by the counterpoise.
  • Page 24 3. If not already in place, insert one thumbscrew knob into each of the holes in the grounding strips. Slightly tighten the thumbscrew knobs. There is no need to ever remove the thumbscrews from the grounding strips; you may leave them inserted and tightened securely. If you do remove the thumbscrews, make sure to place them in a safe, retrievable location.
  • Page 25 At the same time, fit the right half of the counterpoise with the left half. Slide the right half of the counterpoise towards the back of the Model 3301C so that the thumbscrew knobs are flush with the ends of the slots.
  • Page 26 7. Assemble the monopole element:  For a finished length of 40.95 in (1040 mm)—Assemble (2) 116474 rod sections and (1) 116862 center section.  For a finished length of 39.37 in (1000 mm)—Assemble (2) 116474 rod sections. Do not use the 116862 center section. Assembly Instructions...
  • Page 27 9. Connect the output of the unit to a 50-ohm receiver, spectrum analyzer, or RF voltmeter. 10. Press the power switch to the left to turn on power to the Model 3301C. The power LED displays green when the unit is on. For complete information on the front panel controls and indicators, see Operation on page 35.

  • Page 28: Mil-Std-461F Test Kit

    MIL-STD-461F Test Kit The MIL-STD-461F Test Kit includes:  BNC cable (27 in)  Ferrite bead  BNC bulkhead connector  Right-angle bracket Assembly Instructions...
  • Page 29 Attach the ferrite bead at the midpoint of the BNC cable. Attach the angle bracket to the ground plane (screws not included). Plug the BNC cable into the Output on the Model 3301C. Plug the other end of the BNC cable into the BNC bulkhead connector in the right-angle bracket.
  • Page 30 This page intentionally left blank. Assembly Instructions...

  • Page 31: Mounting Instructions

    The Model 3301C is a precision measurement device. Handle your antenna with care. 4-TR Light Tripod Mounting Options Use the 1/4–20 mount on the bottom of the Model 3301C Active Monopole Antenna to mount directly onto an ETS-Lindgren 4-TR Light Tripod; no additional hardware is required.

  • Page 32: 7-Tr And Mast Mounting Options

    7-TR and Mast Mounting Options Following are options for mounting the Model 3301C onto an ETS-Lindgren 7-TR Tripod or mast. Contact the ETS-Lindgren Sales Department for information on ordering optional mounting hardware. Mast refers to 2070 Series, 2075, and 2175 Antenna Towers.

  • Page 33: 2X2 Boom Mounting Options

    2x2 Boom Mounting Options 2x2 boom refers to a typical 2-inch by 2-inch boom. Following are options for mounting the Model 3301C onto a 2x2 boom. Contact the ETS-Lindgren Sales Department for information on ordering optional mounting hardware. Mounting Instructions...
  • Page 34 This page intentionally left blank. Mounting Instructions...

  • Page 35: Operation

    ETS-Lindgren Product Information Bulletin included with your shipment. Front Panel Controls and Indicators When you turn on the Model 3301C, the saturation and power lights will blink and an audible alarm will sound for five to eight seconds. HARGE TATUS...

  • Page 36: Charger Connector

    The saturation indicator will blink red and the unit will beep when the Model 3301C is in saturation. Do not take readings when the unit is in saturation.

  • Page 37: Output Connector

    The power switch operates as an on/off switch for Model 3301C and the battery charging function. When you are using the Model 3301C, the switch should be set to ON. When the Model 3301C is off or you are charging the batteries, the switch should be set to OFF/CHG.

  • Page 38: Dip Switches

    10 dB attenuator. When the 10 dB attenuator or 30 dB attenuator is switched on, the Model 3301C can measure field strengths up to 2.5 V/m or 25 V/m respectively without saturating.
  • Page 39 The Model 3301C is optimized to facilitate extremely sensitive readings. For the most sensitive applications, all internal attenuation should be off. The noise limiting factor on the Model 3301C is the high front end impedance presented to the front end of the wideband amplifier.

  • Page 40: Alarm Dip Switches

    The Model 3301C is shipped with all active alarm DIP switches set to ON. To change DIP switch settings to disable the beep, see the steps on page 41.

  • Page 41: Change Dip Switch Settings

    Monopole Element on page 23 for more information. Disconnect all cables from the antenna base. Turn over the Model 3301C antenna base and place it on a stable surface with the bottom facing up. Use a Phillips screwdriver to remove the eight screws from around the perimeter of the base.

  • Page 42: Charging The Batteries

    Never attempt to recharge a non-rechargeable battery. For maximum battery life, fully charge the batteries before placing the Model 3301C into service for the first time. Failing to fully charge the batteries may result in reduced battery life and cause premature battery failure.

  • Page 43: Calibrating The Model 3301C

    Calibration Steps Depending on the your calibration configuration, see Model 3301C Calibration With Receiver and Signal Generator on page 46 or Model 3301C Calibration With Network Analyzer on page 47. Disconnect the Model 3301C Active Monopole Antenna from power.
  • Page 44 Place a signal source on the signal generator port of the 3301CAL and a receiver on the receiver port. Terminate the output of the Model 3301C with 50 Ω, and record the input signal strength. Compensate for test fixture and effective height of antenna: The receiver port on the 3301CAL has a 5 db loss in signal strength from the mounting stud due to the resistor network in the fixture.

  • Page 45: Example Of Antenna Factor Calculation

    Move the receiver cable to the output port on the Model 3301C, and then place a 50 Ω load on the receiver port of the 3301CAL. Read the output signal. The antenna factor is the input signal (read from the receiver port on the 3301CAL) plus the combined correction factor of 11 dB, minus the output signal (read from the output port on the Model 3301C).

  • Page 46: Model 3301 Calibration With Receiver And Signal Generator

    Model 3301 Calibration With Receiver and Signal Generator Attenuators may be required if VSWR of the receiver or signal generator is high. Calibrating the Model 3301C...

  • Page 47: Model 3301 Calibration With Network Analyzer

    Model 3301 Calibration With Network Analyzer Attenuators are not required with a network analyzer. Calibrating the Model 3301C...
  • Page 48 This page intentionally left blank. Calibrating the Model 3301C...

  • Page 49: Data And Illustrations

    8.0 Data and Illustrations Periodic Rectangular Pulse Train Data and Illustrations...

  • Page 50: Spectrum Of Rectangular Pulse

    Spectrum of Rectangular Pulse Amplitudes and phases of an infinite number of harmonics are required to fully describe the envelope. Data and Illustrations...

  • Page 51: Altering Pulse Width / Pulse Repetition Rate

    Altering Pulse Width / Pulse Repetition Rate The following figures A–D depict the effect of altering either the pulse width or pulse repetition rate. A narrow pulse width (A, C) spreads the pulse energy over a wider frequency band. Wider pulses (B, D) cause narrower lobes. A low pulse repetition rate (A, B) creates widely spaced spectral lines.

  • Page 52: Active Electric Field Antenna Calibration Fixture

    Active Electric Field Antenna Calibration Fixture Data and Illustrations...

  • Page 53: Active Monopole Antenna Calibration Setup

    Active Monopole Antenna Calibration Setup Data and Illustrations...

  • Page 54: Typical Curves-Typical Antenna Factors At The Default Switch Position

    Typical Curves–Typical Antenna Factors at the Default Switch Position (All Off) Data and Illustrations...

  • Page 55: Typical Curves-Typical Maximum Noise Voltage Using 10 Hz Bandwidth

    Typical Curves–Typical Maximum Noise Voltage Using 10 Hz Bandwidth Data and Illustrations...

  • Page 56: Typical Curves-Typical Minimum Discernable Electric Field Levels (Db Uv/M) Under Different Bandwidths

    Typical Curves–Typical Minimum Discernable Electric Field Levels (dB uV/m) Under Different Bandwidths Data and Illustrations...

  • Page 57: Typical Antenna Factors For Different Switch Configurations

    Typical Antenna Factors for Different Switch Configurations Data and Illustrations...
  • Page 58 This page intentionally left blank. Data and Illustrations...

  • Page 59: Appendix A: Warranty

    Appendix A: Warranty See the Product Information Bulletin included with your shipment for the complete ETS-Lindgren warranty for your Model 3301C Active Monopole Antenna. 3301C URATION OF ARRANTIES FOR ODEL All product warranties, except the warranty of title, and all remedies for warranty failures are limited to two years.
  • Page 60 This page intentionally left blank. Warranty...

  • Page 61: Appendix B: Ec Declaration Of Conformity

    Appendix B: EC Declaration of Conformity The EC Declaration of Conformity is the method by which ETS-Lindgren L.P. declares that the equipment listed on this document complies with the EMC Directive and Low Voltage Directive. Factory Issued by ETS-Lindgren L.P.
  • Page 62 Date of Declaration: October 23, 2009 The authorizing signatures on the EC Declaration of Conformity document authorize ETS-Lindgren L.P. to affix the CE mark to the indicated product. CE marks placed on these products will be distinct and visible. Other marks or inscriptions liable to be confused with the CE mark will not be affixed to these products.

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