MFJ-266C HF/VHF/UHF Antenna Analyzer
Instruction Manual
Version 2A
iii
2012 MFJ Enterprises, Inc
Contents
1.0 Introduction........................................................................................................... 1
2.0 Power Sources........................................................................................................ 2
2.1 Internal Batteries ............................................................................................... 2
2.2 External Power Supply...................................................................................... 3
3.0 Operating Mode ..................................................................................................... 3
3.1 Display Backlight.............................................................................................. 3
3.2 Main Menu Screen ............................................................................................ 4
3.3 Frequency Counter Mode (D -> FC) ................................................................. 4
3.4 Antenna Analyzer Mode (U -> ANT) ............................................................... 5
3.5 RF Signal Source .............................................................................................. 5
3.6 L/C Measurement Mode ................................................................................... 5
4.0 Frequency Selection .............................................................................................. 6
4.1 Variable Tuning ................................................................................................ 6
4.2 Range Selection ................................................................................................ 6
4.3 HF-Band Selection ............................................................................................ 6
5.0 Accuracy Limits ..................................................................................................... 7
5.1 SWR Measurements and Local Interference ..................................................... 7
5.2 Checking for Local Interference........................................................................ 7
5.3 Detector Linearity and Accuracy....................................................................... 7
5.4 Calibration-Plane Error ..................................................................................... 8
5.5 Sign Ambiguity (± j) ......................................................................................... 8
6.0 Antenna Measurements .......................................................................................... 9
6.1 Antenna Connectors .......................................................................................... 9
6.2 SWR.................................................................................................................. 9
6.3 Measuring SWR................................................................................................ 9
6.4 SWR, Bandwidth, and Resonance................................................................... 10
6.5 Antenna Tuning .............................................................................................. 10
6.6 Antenna matching ........................................................................................... 11
6.7 Matching Antennas Through A Tuner (ATU)................................................. 11
6.8 Antenna Impedance Readings ......................................................................... 11
6.9 Unpredictable SWR ........................................................................................ 12
7.0 Advanced Functions............................................................................................. 12
7.1 Frequency Measurement ................................................................................. 12
7.2 Field Strength Measurement ........................................................................... 12
7.3 Stimulus Generator as a Signal Source............................................................ 13
7.4 Measuring Unknown Capacitance................................................................... 13
7.5 Measuring Unknown Inductance..................................................................... 14
7.6 Tuning a ¼-Wave or ½-Wave Coaxial Stub.................................................... 14
7.7 Determining Velocity Factor........................................................................... 15
7.8 Testing RF Transformers ................................................................................ 15
7.9 Checking HF Baluns ....................................................................................... 16
7.10 Checking Coax Cable.................................................................................... 16
8.0 Quick Guide to Analyzer Controls and Functions ................................................ 17
Technical Assistance.................................................................................................. 19
12 MONTH LIMITED WARRANTY ....................................................................... 20
