MFJ-259C Instruction Manual
HF/VHF SWR Analyzer
ii
TABLE OF CONTENTS
1.0 INTRODUCTION........................................................................................................................................ 1
1.1
A Quick Word about Accuracy................................................................................................. 1
1.2
Typical Uses ............................................................................................................................ 2
1.3
Frequency Range ..................................................................................................................... 2
2.0 POWER SOURCES ..................................................................................................................................... 2
2.1
External Power Supply............................................................................................................. 3
2.2
Using Internal Batteries ........................................................................................................... 3
2.3
Using Rechargeable “AA” Type Batteries ................................................................................ 3
2.4
Using Conventional “AA” Drycell Batteries............................................................................. 4
2.5
“Power Saving” Mode (sleep mode) ......................................................................................... 4
3.0 MAIN MENU AND DISPLAY .................................................................................................................... 4
3.1
General Connection Guidelines................................................................................................ 4
3.2
Power-up Display..................................................................................................................... 5
3.3
Main MODE descriptions ........................................................................................................ 5
3.4
Blinking “VOLTAGE LOW” display warning ......................................................................... 6
4.0 MAIN (OR OPENING) MODE.................................................................................................................... 7
4.1
General Connection Guidelines................................................................................................ 7
4.2
Antenna SWR.......................................................................................................................... 7
4.3
Coax Loss ................................................................................................................................ 9
4.4
Capacitance ............................................................................................................................. 9
4.5
Inductance ............................................................................................................................... 10
5.0 ADVANCED OPERATION......................................................................................................................... 11
5.1
Forward ................................................................................................................................... 11
5.2
General Connection Guidelines................................................................................................ 12
5.3
(Magnitude of) Impedance mode.............................................................................................. 12
5.4
Return Loss and Reflection Coefficient mode ........................................................................... 13
5.5
Distance to Fault mode ............................................................................................................ 13
5.6
Resonance Mode...................................................................................................................... 14
5.7
Percentage Transmitted Power ................................................................................................. 14
6.0 ADJUSTING SIMPLE ANTENNAS............................................................................................................ 14
6.1
Dipoles .................................................................................................................................... 14
6.2
Verticals .................................................................................................................................. 15
6.3
Tuning a simple antenna.......................................................................................................... 15
7.0 TESTING AND TUNING STUBS AND TRANSMISSION LINES ............................................................. 16
7.1
Testing Stubs ........................................................................................................................... 16
7.2
Velocity Factor of Transmission Lines ..................................................................................... 16
7.3
Impedance of Transmission Lines or Beverage antennas .......................................................... 17
7.4
Adjusting Tuners ..................................................................................................................... 18
7.5
Adjusting Amplifier Matching Networks ................................................................................. 18
7.6
Testing RF Transformers ......................................................................................................... 19
7.7
Testing Baluns......................................................................................................................... 19
7.8
Testing RF Chokes................................................................................................................... 20
8.0 TECHNICAL ASSISTANCE ....................................................................................................................... 20