MFJ Instruction Manual. HF/VHF SWR Analyzer. 1. MFJ HF/VHF SWR ANALYZER. INTRODUCTION. The MFJ SWR Analyzer is an easy to operate . Downloaded by. Page 2. Page 3. Page 4. Page 5. Page 6. Page 7. Page 8. Page 9. Page Page Page Page Page Page MFJ Instruction Manual. HF/VHF/UHF SWR Analyzer. MFJ SWR HF/ VHF ANALYZER. TABLE OF CONTENTS. Warning: READ SECTION BEFORE.
|Country:||Central African Republic|
|Published (Last):||23 December 2015|
|PDF File Size:||18.75 Mb|
|ePub File Size:||12.79 Mb|
|Price:||Free* [*Free Regsitration Required]|
Watch for any display or meter dropout.
Proper alignment mnaual a You have now set initial rough settings for all three detectors, proceeding to impedance mfj 259b manual loads.
This is true for ANY antenna analyzer, since you do not want the analyzer to measure the load at two frequencies!
This adjustment directly affects output signal harmonic content. You may also like.
MFJ B Hf/vhf SWR Analyzer Instruction Manual | eBay
Before proceeding, be sure you have printed a copy of the board layout showing adjustment points, have read all this, and have suitable loads. To enter Test Mode:. Entering test mode may be tricky with some units, and it may take practice. Small set of non-metallic alignment wands for coils, and small jeweler’s screwdrivers for controls.
Never apply external voltages greater mfj 259b manual 3 volts to the antenna port! Be sure the mfj 259b manual goes back exactly as removed. Note that L1-L4 are slug-tuned and require an insulated hex-head tuning wand. Three or four series diodes will reduce voltage below 12 volts.
Since the loads are used to set the number of bits in critical calculations, the maximum reactance error will always be worse than the percentage of resistive mfj 259b manual error.
R56 will not affect anything except the analog SWR meter reading. This is accomplished by setting the analyzer to mid-HF, generally around 15 MHz.
MFJ Enterprises Inc.
mfj 259b manual This page is the most current result. Any one of the s will do the job. Also the and b require 8 or 10 AA batteries.
Show More Show Less. Dirty band-switch contacts may be restored mfj 259b manual spray tuner-cleaners, or WD Acceptable results will be obtained when load resistors are mounted in the very bottom of a UHF-male connector. The item may have some signs of cosmetic wear, but is fully operational and functions as intended. Using this, it is possible to calibrate the B with higher values of load resistance. The second shortfall is the internal amplifier must be linear and have very low total harmonic content.
You should also check the next lower band after each adjustment to ensure that the lower band hasn’t moved excessively. mfj 259b manual
MFJ-259B Analyzer Mini-Manual
Without following these steps many special functions may not work correctly, even if the unit tests properly on calibration loads! This is the approximate resonant frequency of the stub.
Harmonics are worse with low supply voltages, and with low impedance loads. mfj 259b manual
They have different features. Ratings and Reviews Write a review. This item may be a floor model or store return that mcj been used. The theory is frequency spacing between impedance minimums, when converted to half wavelengths, is the distance to an open or short.
This is the weak point for accuracy. Each band should overlap the next by a small amount to ensure mfj 259b manual coverage from 1. A one-bit error can cause a resistive load to appear reactive total of Vs and Mfj 259b manual must always be below bits for a load to be considered resistive.