Digital SWR/Wattmeter
Model MFJ-826B
VERSION 2A
INSTRUCTION MANUAL
CAUTION: Read All Instructions Before Operating Equipment
MFJ ENTERPRISES, INC.
300 Industrial Park Road
Starkville, MS 39759 USA
Tel: 662-323-5869 Fax: 662-323-6551
COPYRIGHT 2008-2010 MFJ ENTERPRISES, INC.
C
DISCLAIMER
Information in this manual is designed for user purposes only and is not intended to
supersede information contained in customer regulations, technical manuals/documents,
positional handbooks, or other official publications. The copy of this manual provided to
the customer will not be updated to reflect current data.
Customers using this manual should report errors or omissions, recommendations for
improvements, or other comments to MFJ Enterprises, 300 Industrial Park Road,
Starkville, MS 39759. Phone: (662) 323-5869; FAX: (662) 323-6551. Business hours:
M-F 8-4:30 CST.
MFJ-826B Digital SWR/Wattmeter Instruction Manual
Contents
THE BASICS
Introduction...................................................................................................................................... 1
Features............................................................................................................................................ 1
Specifications................................................................................................................................... 1
Front Panel....................................................................................................................................... 2
LCD Display ....................................................................................................................... 2
LCD Contrast Control......................................................................................................... 2
MODE Button.....................................................................................................................2
PEAK Button ...................................................................................................................... 2
ALRM LED ........................................................................................................................3
ALARM Button .................................................................................................................. 3
POWER Button................................................................................................................... 3
Back Panel ....................................................................................................................................... 3
Power .................................................................................................................................. 3
RS-232 ................................................................................................................................ 3
Ground ................................................................................................................................ 3
Antenna............................................................................................................................... 3
Transmitter.......................................................................................................................... 3
Installation ....................................................................................................................................... 4
THE MENUS
Main Mode Menus........................................................................................................................... 4
Digital Wattmeter Menu ..................................................................................................... 4
Power Bar Meter Menu....................................................................................................... 4
SWR Bar Meter Menu ........................................................................................................ 5
SWR/Power Bar Meters Menu ........................................................................................... 6
Setup Mode Menus .......................................................................................................................... 6
Meter Range Menu ............................................................................................................. 7
Alarm SWR Menu .............................................................................................................. 7
Beep Menu.......................................................................................................................... 7
APPENDICES
Factory Defaults............................................................................................................................... 7
Self Test ........................................................................................................................................... 8
SWR Bridge Calibration .................................................................................................................. 9
Frequency Counter Calibration...................................................................................................... 10
In Case of Difficulty ......................................................................................................................10
Technical Assistance...................................................................................................................... 10
© 2008-2010 MFJ Enterprises, Inc.
i
MFJ-826B Digital SWR/Wattmeter Instruction Manual
FIGURES
Figure 1. MFJ-826B Front Panel .................................................................................................... 2
Figure 2. MFJ-826B Back Panel..................................................................................................... 3
Figure 3. Power Bar Meter (High Range)....................................................................................... 5
Figure 4. Power Bar Meter (Mid Range) ........................................................................................ 5
Figure 5. Power Bar Meter (Low Range) ....................................................................................... 5
Figure 6. SWR Bar Meter ............................................................................................................... 5
Figure 7. Main Mode Menus Display ............................................................................................. 6
TABLES
Table 1. Failure Messages............................................................................................................... 8
© 2008-2010 MFJ Enterprises, Inc.
ii
MFJ-826B Digital SWR/Wattmeter Instruction Manual
The Basics
Introduction
The MFJ-826B digital SWR/Wattmeter/Frequency Counter measures up to 1500 watts. It has three highresolution ranges with accuracy in each range from 1.8 to 54 MHz. True peak or average forward and
reflected watts, SWR and frequency can be simultaneously displayed.
There are also auto-ranging bar meter modes to display forward and reflected power, SWR and power
twin bar meters, or SWR only bar meter; SWR and forward power are also displayed numerically.
PeakHold
seconds. These digital-analog displays make it visually easy to tune antenna tuners, amplifiers and
transmitters.
There are three high-resolution forward/reflected power ranges that are automatically selected: a QRP
range (25 watts full scale), a mid-range (250 watts full scale) and a high-range (1500 watts full scale).
TrueActive
Built-in frequency counter gives any transmitter digital frequency readout in continuous carrier mode.
Perfect for older and QRP rigs such as MFJ-9420 travel radios and MFJ-9340 QRPCubs
The MFJ-826B enters a “sleep” mode when idle and when no transmit signal is present, turning off the
microprocessor clock to avoid the generation of spurious signals.
Features
• Power range of 25, 250 or 1500 watts
• 1.8 to 54 MHz continuous frequency coverage
• Adjustable alarm SWR from 1.5 to 3.0
• Multifunction backlit LCD display with contrast control
• Numeric readings for frequency, SWR, forward and reflected power
• Bar meters for SWR, forward and reflected power with auto-ranging
• Peak or average power mode
• Built-in frequency counter
• Built-in bootloader for field upgradeable firmware
Specifications
• RF power range : 25, 250 or 1500 watts
• Frequency range : 1.8 to 54 MHz continuous coverage
• Frequency counter accuracy : ±1 kHz
• A/D conversion resolution : 10-bit
• Forward power display resolution : 0.1 for < 100 watts and 1 for ≥ 100 watts
• Reflected power display resolution : 0.1 for < 10 watts and 1 for ≥ 10 watts
• SWR display resolution : 0.01 for < 10:1 and 0.1 for ≥ 10:1
• Power bar meters resolution : 60 segments
TM
feature freezes the highest forward power displayed bar segment for one, two or three
TM
peak reading circuit gives true peak or average power on all modes.
TM
.
© 2008-2010 MFJ Enterprises, Inc.
1
Loading...