MFJ MFJ-266B - Antenna Analyzer Mode (U -> ANT); L;C Measurement Mode

MFJ-266B HF/VHF/UHF Antenna Analyzer Instruction Manual
 2012 MFJ Enterprises, Inc. Version 1D 5
3.4 Antenna Analyzer Mode (U -> ANT)
In this mode, the analyzer's built-in stimulus generator drives a bridge
circuit and the unit functions as a network analyzer. The top line of the
screen displays band selection (a single letter) and the operating
frequency in MHz (see Section-4). The bottom line simultaneously
displays complex impedance (Z = R+JX), impedance magnitude (Z =
Ω), and SWR for any load connected to the antenna jack. Note that only
SWR is displayed in the UHF operating range.
50+j 0 50 1.0
Stimulus Frequency
Band (Frequency) Selection
SWR (1.0:1)
10.000MHz D SWR
Impedance MagnitudeComplex Impedance
3.5 RF Signal Source
RF output from the MFJ-266B’s built-in stimulus generator is available
at the ANT connector in Analyzer mode. This signal is a +2 dBm
continuous carrier. When using the analyzer as a signal source, the
operating range, band, and frequency are selected in the normal manner
and will be displayed on the screen (see Frequency Selection, Section-4).
3.6 L/C Measurement Mode
The MFJ-266B may be used to measure the value of unknown capacitors
and inductors. To measure L/C values, connect the device to be tested to
the antenna jack and follow the procedure outlined below:
Measure Capacitance
Turn the analyzer off, then press and hold the Up button while turning
PWR back on. The screen will display the value in pF along with the
stimulus frequency being used for the measurement.
Measure Inductance
Turn the analyzer off, then press and hold the Down button while
turning PWR back on. The display will show inductance in uH along
with the stimulus frequency.
5.000MHz D C=
122 pF
Capacitance
Frequency Band
5.000MHz D L=
10.200 uH
Inductance
Frequency Band
5.000MHz D C=
Xc>1.5k
Frequency Band
Reactance out of Range
Change Stimulus Frequency