MFJ-269D Instruction Manual LF/HF/VHF/UHF SWR Analyzer
7
The BNC
Frequency Counter Input
is for frequency counter measurements only. See section 4.5 for
the counter's operating instructions.
3.2
Power-up Display
Important Note:
Before powering up the analyzer, check the status of the
UHF
switch located above the
LCD window on the left. This switch must be in the "up" or in the
Off
position unless
UHF
operation is
intended.
Note:
The following is a description of the basic opening (or default) menu used by the MFJ-269D.
Your analyzer also has an
advanced user
section (5.0).
When applying
Power
, a sequence of message screens appear on the LCD display. The first screen lists
the software version (
Ver)
: Be sure to have this number handy when referring technical questions about
your analyzer to MFJ Customer Service:
The second message shows the software copyright date:
The third message is a voltage check. It displays the operating voltage, indicating battery condition or
the voltage of your external power supply.
The fourth and final screen is the first "working display" (Complex Impedance). The two analog panel
meters also activate when the working display comes up.
3.3
Main Measurement Modes (LF/HF/VHF, 0.10-230 MHz)
Momentarily pressing (or tapping) the
Mode
button after the first working display appears allows you to
scroll through all five basic measurement modes provided by the MFJ-269D. The opening mode is
Impedance R & X
(resistance and reactance). As each new mode comes up, its title screen appears for
about two seconds, and then the companion data screen appears. Each of the five Basic Modes are listed
below:
1. Impedance R&X:
This is the analyzer's "default mode", and it is the function most commonly used.
The top line of the data screen displays
Frequency
in MHz and
SWR
, while the bottom line shows
complex impedance where
Rs
equals the load's series resistive component and
Xs
shows the load's series
reactive component. In this function, the analog
SWR
and Impedance Meters (
Z
) are also activeated.
2. Coax Loss:
Pressing
Mode
once brings up the
Coax Loss --
followed by the data screen. The top line
shows
Frequency
in MHz and the bottom line displays
Coax Loss in dB
.
3. Capacitance in pF:
The third mode displays
Frequency
in MHZ on the top line, followed by
Xc
(capacitive reactance) on the bottom line. The analog meter also shows reactance
X
.
MFJ Enterprises
(c) 2014
MFJ-269D
Ver 14.14