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深圳市朗普电子科技有限公司

Theory of Operation

5

The electrical values of the element circuits are carefully

balanced and designed so that current from the reverse wave

will cancel the other almost completely. The result is

directivity always higher than 25 dB, which means that the

element is highly insensitive (nulled) to the REVERSE

direction wave. Being highly directional, the Thruline

element is sensitive (at one setting) only to one of the

travelling waves that produce standing waves by

interference. Thruline Wattmeter measurements are,

therefore, independent of position along standing waves.

Figure 4

Readings with

Various

Envelopes

TEL:0755-88851600
FAX:0755-88850158

http://www.17Lp.com

E-mail:[email protected] [email protected]

深圳市朗普电子科技有限公司

TEL:0755-88851600
FAX:0755-88850158

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Содержание 4391A

Страница 1: ...91A Copyright 2008 by Bird Electronic Corporation Instruction Book Part Number 920 4391A Rev H Thruline and Power Analyst are Registered Trademark of Bird Electronic Corporation TEL 0755 88851600 FAX...

Страница 2: ...vice or Adjust Alone Under no circumstances should any person reach into an enclosure for the purpose of service or adjustment of equipment except in the presence of someone who is capable of renderin...

Страница 3: ...hat have a minimum capacity of 4600 milliamper hours mAh Do not install batteries that are not Nickel Metal Hydride Do not install NiMH batteries that have less than 4600 mAh capacity Failure to compl...

Страница 4: ...severe shock to individuals CAUTION Never apply RF power to the Model 4391A Wattmeter unless both line section sockets are filled with either an element or a dust plug If an element is used it is advi...

Страница 5: ...UTTORE LA PROZIONE DI SICUREZZA POTREBBE VENIRNE COMPROMESSA SERVICE SERVICING INSTRUCTIONS ARE FOR USE BY SERVICE TRAINED PERSONNEL ONLY TO AVOID DANGEROUS ELECTRIC SHOCK DO NOT PERFORM ANY SERVICING...

Страница 6: ...CION Y FUSIBLE DE VOLTAJE CORRECTO VEA EL MANUAL AUSSCHLIESSLICH VORSCHRIFTSM SSIGE WECHSELSPANNUNGS EINSTELLUNG UND SICHERUNG BENUTZEN SIEHE DAZU HANDBUCH UTILLIZZARE TENSIONE E FUSIBLE ADATTI FARE R...

Страница 7: ...RE PR SENTE DANS LA PRISE DE L L MENT H F CONSERVER L L MENT DANS LA PRISE LORS DE L EMPLOI HF SPANNUNG KANN IN DER HF ELEMENT BUCHSE ANSTEHEN ELEMENT W HREND DES BETRIEBS EINGEST PSELT LASSEN PUEDE H...

Страница 8: ...equipment capabilities and how to install it Experienced operators can refer to Chapter 4 Operating Instructions All instructions necessary to operate the equipment are contained in this section Maint...

Страница 9: ...Bird Model 4391M Power Analyst viii TEL 0755 88851600 FAX 0755 88850158 http www 17Lp com E mail df 17Lp com Lp Lp 17 com TEL 0755 88851600 FAX 0755 88850158...

Страница 10: ...Reading Reflected CW Power 12 Reading SWR 12 Measuring Peak Envelope Power 13 Measuring Amplitude Modulation 14 Measuring Power in dBm 15 Measuring Return Loss 15 Insertion Loss or Attenuation 16 Mon...

Страница 11: ...nted Circuit PC Board Removal 25 QC Connectors Removal 26 Line Section Removal 27 Battery Replacement 28 Parts List 30 Customer Service 33 Specifications 34 TEL 0755 88851600 FAX 0755 88850158 http ww...

Страница 12: ...itude modulation in 50 ohm coaxial transmission lines It is intended for use with CW AM FM SSB TV and Pulse modulation envelopes The instrument directly reads PEP or CW power in watts milliwatts or ki...

Страница 13: ...Change type RF connectors which may be easily interchanged with any other Bird QC connector See Bird Catalog for types available Operating power is derived from rechargeable nickel metal hydride batt...

Страница 14: ...eys select which parameter is to be measured The three modifier keys simply modify the way in which the result is displayed The range selector switches identify to the computer the nominal full scale...

Страница 15: ...aves is in the Plug in Element The circuitry of the element and its relationship to the other components of the Thruline Watt meter are illustrated in the schematic diagram Energy will be produced in...

Страница 16: ...highly insensitive nulled to the REVERSE direction wave Being highly directional the Thruline element is sensitive at one setting only to one of the travelling waves that produce standing waves by in...

Страница 17: ...Bird Model 4391A Power Analyst 6 TEL 0755 88851600 FAX 0755 88850158 http www 17Lp com E mail df 17Lp com Lp Lp 17 com TEL 0755 88851600 FAX 0755 88850158...

Страница 18: ...orrect AC voltage is selected via a rear panel switch Figure 5 The meter may be operated in this manner with the batteries removed if desired CAUTION Long term storage of this instrument can affect ba...

Страница 19: ...ed the other socket should be filled with a dust plug or a higher power element Also for greatest accuracy the element s should be chosen having the lowest possible power range that will not result in...

Страница 20: ...1 For a 250 watt element they are set at 2 5 and x100 Sometimes it is necessary to use milliwatts or kilowatts as the unit of measure In other words 1 watt becomes 10 x 100 milliwatts and 2500 watts b...

Страница 21: ...Bird Model 4391A Power Analyst 10 TEL 0755 88851600 FAX 0755 88850158 http www 17Lp com E mail df 17Lp com Lp Lp 17 com TEL 0755 88851600 FAX 0755 88850158...

Страница 22: ...rrect setting of the range switches by the operator nor will the meter or its elements be damaged if the switches are incorrectly set The Model 4391A arrives at values of CW power by a method quite di...

Страница 23: ...e indicated by the range switches Reading SWR Two elements with a 10 to 1 power range ratio are required for this mode Press the SWR key momentarily If average forward power is between 10 and 120 of t...

Страница 24: ...B Reflected Power VSWR Return Loss dB Reflected Power 1 01 46 1 0 00 1 45 14 7 3 37 1 02 40 1 0 01 1 50 14 0 4 00 1 03 36 6 0 02 1 75 11 3 7 44 1 04 34 2 0 04 2 00 9 50 11 11 1 05 32 3 0 06 2 25 8 30...

Страница 25: ...ercent Over modulation will be indicated as 99 9 percent Refer to Table 3 Table 3 Amplitude Modulation Because of the threshold of the RF diode a modulated signal which has a minimum power level below...

Страница 26: ...message is displayed if CW power is more than 24 dB below or peak power is more than 6 dB above the nominal element range Refer to Table 4 Table 4 Watts dBm Equivalents Measuring Return Loss The meas...

Страница 27: ...ll the maximum or minimum reading depress and hold the MAX or MIN key When these keys are released the meter goes back to displaying the current value of the parameter being measured Recalling max or...

Страница 28: ...blank To find a peak begin making the adjustment in whichever direction produces a right facing arrow and continue slowly in that direction until the arrow head turns around At this point the peak ha...

Страница 29: ...important precautions regarding static electricity when opening the housing WARNING Use only NIckel Metal Hydride NiMH batteries that have a minimum capacity of 4600 milliamper hours mAh Do not insta...

Страница 30: ...and dirt from the front panel and lower hous ing Remove stubborn dirt with mild detergent and a soft cloth 3 Clean the inside of the line section bores using cotton swab stick dampened with alcohol 4...

Страница 31: ...L element socket 3 Connect a BNC to BNC cable assembly from the output of calibrator source to the DC feed in adapter 4 Set the RF Power Analyst range switches to the 10 and x100 positions Connect AC...

Страница 32: ...the contact spring in the element socket If the contact spring changes position you might experience erratic power readings You can use a small screwdriver to adjust the position of the contact spring...

Страница 33: ...tly toward the center of the element socket bore so that the profile of the element contact is visible when viewing the element socket from the top of the socket bore Figure 17 3 If the contact is acc...

Страница 34: ...lement wiper contact Refer to page 21 Loose hold down catch Readjust catch to hold element securely in place Worn line section Replace line section Refer to page 27 Defect on Data Acquisition PC board...

Страница 35: ...Low charge on the batteries Recharge the batteries Defective circuit component Replace the Main circuit board assembly Refer to page 25 Same segment on all displays doesn t light Defective circuit com...

Страница 36: ...ts to the housing item 2 4 Lift the Main PC board and remove one battery tube Refer to figure on page 29 5 On the Main PC board unsolder and remove the red and orange wires that come from the power su...

Страница 37: ...tor that secure the connectors to the housing Figure 20 item 1 2 Remove the two QC connectors item 2 by pulling them away from the line section assembly Figure 19 Removing Main PCB TEL 0755 88851600 F...

Страница 38: ...hex nuts units with serial numbers 1724 and above Figure 21 item 5 that secure the PCB cover then remove the cover item 6 and spacers item 7 5 Disconnect the ribbon cable assembly from the PC board h...

Страница 39: ...n but do not remove the remaining two screws that secure the Main PCB item 2 4 Tilt the Main PC board assembly up to expose the bat teries then tighten the two screws to secure the PCB 5 Unfasten the...

Страница 40: ...re the front cover 10 Charge the batteries for 16 hours before using the instrument Figure 22 Tilt Main PCB to Expose Batteries Figure 23 Battery Replacement TEL 0755 88851600 FAX 0755 88850158 http w...

Страница 41: ...tor QC F N 4240 062 2 2 LED display DS1 DS4 5 1337 4 3 Keyboard legend 4386 012 1 4 PC board Main assembly 4391B007 1 5 Velcro strap 5 1958 1 6 PC board assy includes rectifier circuit 4391A041 1 7 Fu...

Страница 42: ...w Machine filister head No 4 40 1 4 in lg sst COML 2 6 Support 4381 029 2 7 Screw Machine filister head No 8 32 1 2 in lg sst COML 4 8 Screw Machine filister head No 4 40 7 8 in lg sst COML 2 9 Spacer...

Страница 43: ...391 027 2 5 Screw Machine filister head No 4 40 1 4 in lg sst COML 2 6 Support 4381 029 2 7 Screw Machine filister head No 8 32 1 2 in lg sst COML 4 8 Hex Nut with nylon insert No 4 40 1131 1013 00 2...

Страница 44: ...instruments returned must be shipped prepaid and to the attention of Bird Service Center Bird Service Center 30303 Aurora Road Cleveland Solon Ohio 44139 2794 Phone 440 519 2298 Fax 440 519 2326 E ma...

Страница 45: ...e Temperature Range Operating Storage 10 C to 45 C 50 F to 113 F 20 C to 45 C 4 F to 113 F Input Power Requirements Voltage Frequency Power Batteries Battery Life 100 130 or 200 230 VAC Switch Selecta...

Страница 46: ...be waived by Buyer unless made in writing within ten 10 days from the date of discovery of the defect The above warranties shall not extend to any products or parts thereof which have been subjected...

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