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INSTRUCTION MANUAL

AL-RE101

LOOP ANTENNA

SECTI ON 2

-

PRODUCTS AVAILABLE FROM COM-POWER

1912 1 E l T o ro R d

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Si l vera do, Ca lifo rni a 9 26 76

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(9 49) 459 -96 00

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co m-p o wer. com

Rev101617

2.0 Products Available from Com-Power

www.com-power.com

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Содержание AL-RE101

Страница 1: ...Page 1 of 26 INSTRUCTION MANUAL AL RE101 LOOP ANTENNA 19121 El Toro Rd Silverado California 92676 949 459 9600 com power com Rev101617 INSTRUCTION MANUAL for LOOP ANTENNA Model AL RE101...

Страница 2: ...Factors 10 4 1 1 Interpolation of Antenna Conversion Factors 12 5 0 Antenna Theory 13 5 1 Open Circuit Antenna Terminal Voltage vs Flux Density 13 5 2 Determination of Antenna Conversion Factors 15 5...

Страница 3: ...power com Rev101617 List of Figures FIGURE 1 AL RE101 Features 7 FIGURE 2 AL RE101 Loop Antenna Dimensions 8 FIGURE 3 Typical Test Arrangement 9 FIGURE 4 Antenna Conversion Factors 10 FIGURE 5 Typical...

Страница 4: ...escriptions of product features product specifications safety precautions operational instructions antenna theory measurement guidelines warranty and product maintenance information Information contai...

Страница 5: ...RUCTION MANUAL AL RE101 LOOP ANTENNA SECTION 2 PRODUCTS AVAILABLE FROM COM POWER 19121 El Toro Rd Silverado California 92676 949 459 9600 com power com Rev101617 2 0 Products Available from Com Power...

Страница 6: ...2676 949 459 9600 com power com Rev101617 3 0 Product Information 3 1 Incoming Inspection Please check the contents of the shipment against the package inventory in section 3 2 to ensure that you have...

Страница 7: ...ng instrumentation 7 cm Spacing 2 The 7 cm spacing required for MIL STD 461 RE101 is achieved when the front edge of the plexi glass bottom plate of the antenna assembly is positioned perpendicularly...

Страница 8: ...3 3 cm 5 24 in Number of Turns N 36 Turns Wire Type 7 Strand 41 AWG Litz Wire Loop Shielding Electrostatic Shield Resistance of Loop Coil RC 10 nominal Inductance of Loop Coil L 340 H nominal Connecto...

Страница 9: ...Test Arrangement Generally the AL RE101 Loop Antenna is intended to be positioned at a 7 cm distance from the Equipment Under Test EUT Due to the small size of the loop coil its close proximity to th...

Страница 10: ...Hz as shown in Figure 4 To find the factors for frequencies between those listed on the table see section 4 1 1 The 100 k factors are used when the AL RE101 Loop Antenna is connected to a measuring in...

Страница 11: ...ngth value or flux density in dBpT EXAMPLE CALCULATION 1 An EUT emission is identified at a frequency of 500 Hz with a measured value of 40 dB V or 100 V on a measurement instrument having a nominal i...

Страница 12: ...tenna conversion factor at 60 Hz is calculated Using the Figure 4 table the following values are known Frequency Antenna Conversion Factor 50 1 50 Hz ACF1 77 7 dBpT V 2 100 Hz ACF2 71 7 dBpT V Using E...

Страница 13: ...open circuit loop terminal voltage number of turns in the coil area of the coil the frequency and the average flux density within the area of the coil Equation 3 is resolved below by substituting the...

Страница 14: ...itude ei is 120 V or 41 6 dB V NOTE The same result can be determined using Equation 1 and the 100 k antenna conversion factor given in Figure 4 EQUATION 1 Magnetic Field Strength in dBpT Measured Val...

Страница 15: ...e AL RE101 Loop Antenna in Equation 7 where RL load resistance or input impedance of measurement instrument in ohms RC loop coil resistance 10 L loop coil inductance 0 00034 H VL V voltage across R in...

Страница 16: ...ncy of 500 Hz with the AL RE101 Loop Antenna connected directly to a spectrum analyzer having an input impedance RL of 50 ohms which indicates a measured amplitude VL V of 100 V or 40 dB V 500 x 3 144...

Страница 17: ...ls are terminated by the input impedance of the measuring instrument RL The measured voltage VL is proportional to the impedance of the loop coil RC jXC and RL This relationship is demonstrated in Equ...

Страница 18: ...00 com power com Rev101617 In Equation 6e Equation 6a is integrated to substitute for ei in order to solve for B VL And finally in Equation 6f we multiply by 106 in order to convert the units from Tes...

Страница 19: ...rent can be monitored by measuring the voltage drop across a 1 ohm resistor placed in series with the drive line to the transmit loop or it can be monitored using a current probe placed around the dri...

Страница 20: ...r Power sweep generator Network analyzer Spectrum Analyzer with tracking generator 6 1 2 Measuring Instruments Any properly functioning calibrated measuring instrument or combination of measuring inst...

Страница 21: ...ilure such as a cold solder joint broken wire etc can be detected And from section 6 2 Calibration 2 The loop antenna shall be considered to be calibrated when the levels have been compared to the val...

Страница 22: ...der the above conditions the measured value in dB V on the measuring instrument connected to the AL RE101 Loop Antenna at any given frequency plus the respective appropriate antenna conversion factor...

Страница 23: ...AL RE101 Loop Antenna at 30 Hz is 43 35 dB V The theoretical 50 ohm antenna conversion factor for the AL RE101 Loop Antenna calculated using Equation 5 and Equation 7 and given in the table shown in...

Страница 24: ...anty to repair damage resulting from attempts to install repair service or modify the instrument by personnel other than Com Power service representatives Under no circumstances does Com Power recogni...

Страница 25: ...eable parts If the unit does not operate or needs calibration please contact Com Power Corporation Any modifications or repairs performed on the unit by someone other than an authorized factory traine...

Страница 26: ...ION 9 TYPICAL PERFORMANCE DATA 19121 El Toro Rd Silverado California 92676 949 459 9600 com power com Rev101617 9 0 Typical Performance Data 0 20 40 60 80 100 0 01 0 1 1 10 100 1000 Frequency kHz Conv...

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