IntelliTunerTM Automatic Antenna Tuner
IntelliTunerAutomatic Antenna TunerTMModel MFJ-993BINSTRUCTION MANUALCAUTION: Read All Instructions Before Operating EquipmentMFJ ENTERPRISES, INC.300 Industrial Park RoadStarkville, MS 39759 USATel: 662-323-5869 Fax: 662-323-6551VERSION 1ACOPYRIGHTC200 5 MFJ ENTERPRISES, INC.
MFJ-993B IntelliTuner Automatic Antenna TunerInstruction ManualContentsTHE BASICSIntroduction. 1Features. 2Specifications. 2Fast Start . 3Front Panel. 4SWR/Wattmeter. 4LCD Display . 4LCD Contrast Control. 4ANT Button . 4MODE Button. 4C-UP and C-DN Buttons . 4L-UP and L-DN Buttons. 5AUTO Button . 5TUNE Button. 5VOL Control . 5POWER Button. 5Back Panel . 7Power . 7Remote Port . 7Radio Interface. 7Transmitter. 8Ground . 8Balanced Line . 9Wire . 9Antenna 1. 9Antenna 2. 9Installation . 9SWR/Wattmeter. 10THE MENUSMain Mode Menus. 11Digital Wattmeter Menu . 11Power Bar Meter Menu. 11SWR Bar Meter Menu . 12L-Network Menu . 12Tuner Indicators . 13Antenna. 13IntelliTune. 13Memory. 13Power Level . 13LC Limit . 14Meter Range. 14 2003-2005 MFJ Enterprises, Inc.i
MFJ-993B IntelliTuner Automatic Antenna TunerInstruction ManualAuto/Semi . 14StickyTune . 14Setup Mode Menus . 15Power Level Menu. 15Target SWR Menu . 15Auto Tune SWR Menu . 15Meter Range Menu . 16Peak Hold Menu . 16Memory Menu . 16IntelliTune Menu . 17SWR Beep Menu . 17Beep Menu. 17Refresh Menu. 17LC Limit Menu . 18OPERATIONManual Tuning. 18Meter Codes and Audible Beeps. 19Foldback Circuit . 20Grounding Hints . 21Antenna System Hints. 21Location . 21Matching Problems . 21APPENDICESResetting the Tuner . 23Factory Defaults. 23Delete Antenna Memory. 24Total Reset . 24Self Test . 24Power Down Circuit Test. 25Relay Test . 26Firmware Version Number via Meter. 26Setting the Speaker Volume. 26Wattmeter Calibration. 27SWR Bridge Calibration . 27Frequency Counter Calibration. 28In Case of Difficulty . 29Technical Assistance. 29List of Accessories. 29Circuit Block Diagram. 30ii 2003-2005 MFJ Enterprises, Inc.
MFJ-993B IntelliTuner Automatic Antenna TunerInstruction ManualFIGURESFigure 1. Installation Block Diagram. 3Figure 2. MFJ-993B Front Panel . 4Figure 3. Mode Button Flow Chart and Button Action . 6Figure 4. MFJ-993B Back Panel. 7Figure 5. Alinco Interface Cable. 8Figure 6. Icom Interface Cable . 8Figure 7. SWR/Wattmeter . 10Figure 8. Power Bar Meter (High Range). 12Figure 9. Power Bar Meter (Low Range) . 12Figure 10. SWR Bar Meter . 12Figure 11. Main Mode Menus Display . 13Figure 12. Tuner Indicators. 14Figure 13. Power-On Operations . 23Figure 14. MFJ-993B Circuit Block Diagram . 30TABLESTable 1.Table 2.Table 3.Table 4.Memory Resolution . 16Meter Needle Stationary Codes . 19Meter Needle Bounce Codes . 20Failure Messages. 25 2003-2005 MFJ Enterprises, Inc.iii
MFJ-993B IntelliTuner Automatic Antenna TunerInstruction ManualTHIS PAGE IS LEFT BLANK INTENTIONALLYiv 2003-2005 MFJ Enterprises, Inc.
MFJ-993B IntelliTuner Automatic Antenna TunerInstruction ManualThe BasicsIntroductionThe MFJ-993B IntelliTunerTM lets you rapidly tune any antenna automatically: balanced, unbalanced, orsingle-wire. The MFJ-993B is a comprehensive automatic antenna tuning center with SWR/wattmeter,antenna switch for two antennas, and a 4:1 current balun for balanced lines.MFJ's exclusive InstantRecallTM, IntelliTuneTM and AdaptiveSearchTM algorithms give you fast automatictuning with more than 20,000 non-volatile VirtualAntennaTM memories. Each of the two antennas hasfour banks of memory; each memory bank has over 2500 non-volatile memories for tuner settings.The tuner includes a highly efficient switching L-network with wide matching capability, 1.8 to 30 MHzcoverage, cross-needle power meters, backlight LCD display, a port for an accessory remote control, aradio interface port, and heavy-duty 16 amp/1000 volt relays. It is rated at 300 watts to match 6 to 1600ohms antennas (SWR up to 32:1) or 150 watts to match wider range of 6 to 3200 ohms (SWR up to 64:1).A maximum of 256 values of inductance and 256 values of capacitance are available. With thecapacitance switched between the input and output side, this provides a total of 131,072 L/C tuningcombinations. The nominal tuning ranges are 0 to 24 μH and 0 to 3900 pF.All MFJ IntelliTunersTM learn and remember. When you transmit, they automatically adjust for minimumSWR and remember the frequency and tuner settings, safely stored in non-volatile memory. The nexttime you operate on that frequency (or close to it) and antenna, these tuner settings are instantly restoredand you’re ready to operate in milliseconds. Each of two antenna selections has four banks of memory,which can learn and remember more than 2500 frequencies and tuner settings per bank.When you key your transmitter, MFJ’s InstantRecallTM checks its memory to see if you have operatedthat frequency before. If so, tuning is instantaneous and you’re ready to operate. If not, MFJ’sIntelliTuneTM algorithm (based on MFJ’s famous SWR Analyzer technology) kicks in. It measures thecomplex impedance of your antenna. Next, it calculates the components it needs and instantly snaps themin. Finally, it fine-tunes to minimize SWR, and you’re ready to operate--all in a fraction of a second.If the antenna impedance is not within the tuner’s measurement range, MFJ’s AdaptiveSearchTMalgorithm goes into action. Frequency is measured and relevant components values are determined. Onlythose values are searched for fast tuning. If it still cannot find a match, the search is performed againusing a different search pattern.The target SWR can be set at 1.0 through 2.0. The minimum power to tune is approximately two watts.You can manually tune where you can’t transmit (for listening out of ham bands).All MFJ’s IntelliTunersTM support radio tuner interfaces that are compatible with Alinco EDX-2 tuner,Icom AH-3 and AH-4 tuners, Kenwood AT-300 tuner, Yaesu FC-30 tuner, and certain Yaesu radios withCAT system. Optional interface cables MFJ-5124A (for Alinco), MFJ-5124I (for Icom), MFJ-5124K (forKenwood), MFJ-5124Y and MFJ-5124Y2 (for Yaesu) are available from MFJ Enterprises, Inc. Theoptional MFJ-993RC Remote Control provides most tuner controls, allowing convenient remote locatingof the tuner itself.The tuners enter a “sleep” mode when idle and when no transmit signal is present, turning off themicroprocessor clock to avoid the generation of spurious signals. 2003-2005 MFJ Enterprises, Inc.1
MFJ-993B IntelliTuner Automatic Antenna TunerInstruction ManualFeatures Automatically matches antennas with impedances of 6 to 1600 ohms or 6 to 3200 ohmsHandles 300 watts (match 6 to 1600 ohms) or 150 watts (match 6 to 3200 ohms)Tune in less than 15 seconds, usually less than 5 secondsOver 20,000 non-volatile memories for tuner settingsFour memory banks per antenna with over 2500 memories per bankHighly efficient switching L-network matching circuit1.8 to 30 MHz continuous frequency coverageAdjustable target SWR 1.0 to 2.0Adjustable SWR threshold 0.5 to 1.5Lighted cross-needle SWR/wattmeter with high, low, and auto range optionsMultifunction backlit LCD display with contrast controlNumeric readings for SWR, forward and reflected powerBar meters for SWR, forward and reflected power with range optionsAudio SWR meter with volume controlBuilt-in frequency counterTwo SO-239 coax fed antenna connectorsConnector for random wire or single wire antennasBuilt-in 4:1 current balun for balanced line antennasOptional remote controlOptional radio interface for compatible radiosSpecifications Impedance matching range: 6 to 1600 ohms (300 watts) or 6 to 3200 ohms (150 watts)SWR matching range: up to 8:1 for 50 ohms and up to 32:1 for 50 ohms (300 watts)up to 8:1 for 50 ohms and up to 64:1 for 50 ohms (150 watts)Minimum power for tuning: 2 wattsMaximum power while tuning: 100 watts with foldback, 20 watts without foldbackRF power limit: 300 watts SSB/CWFrequency range: 1.8 to 30 MHz continuous coverageFrequency counter accuracy: 1 kHz across HF bandsFrequency counter range: up to 50 MHzCapacitance range: 0 to 3908 pF nominal (256 values)Inductance range: 0 to 24.86 μH nominal (256 values)Relay rating: 16 amp 1000 voltsRelay electrical life: 100,000 operationsRelay mechanical life: 10 million operationsMemory endurance: 1 million erase/write cyclesMemory data retention: 200 yearsPower requirements: 12 - 15 volts DC, 2.1 5.5 mm coaxial plug, center pin positiveCurrent consumption: 1 amp or lessDimensions (approx.): 10.1 2.8 9.2 in. (257 71 234 mm) (width/height/depth)not including connectorsWeight (approx.): 3.9 lb (1.77 kg)†Specifications and design are subject to change without notice. 2 2003-2005 MFJ Enterprises, Inc.
MFJ-993B IntelliTuner Automatic Antenna TunerInstruction ManualFast StartWARNING Never operate the tuner with its cover removed. Contact with the components inside thetuner while transmitting will result in painful RF burns.Locate the tuner so that the rear terminals are not accessible during operation. The singlewire and balanced line connection may have high voltage while transmitting.Disconnect all antennas from the tuner during lightning storms.Always tune with low power (about 10 watts). Apply maximum power only after tuning up.Never exceed tuner specifications.Do not transmit with a high SWR for extended periods of time.1. Connect the MFJ-993B to a 12-15 VDC voltage source capable of supplying at least 1 amp.2. Connect your transmitter to the TRANSMITTER connector using a 50-ohm coaxial cable.3. Connect your coax-fed antenna to the ANTENNA 1 connector using a 50-ohm coaxial cable, orconnect your random wire to the WIRE binding post, or connect your balanced line antenna to theBALANCED LINE binding posts and connect a jumper between the other two posts as indicated.4. Connect your ground connection to the GROUND post.5. Press the [POWER] button to turn on the MFJ-993B tuner. Place the [ANT] button in the outposition to select antenna 1. Press the [AUTO] button in to select semi-automatic mode.6. Key your transmitter to output a carrier of 10 watts CW, FM or AM.7. Press and hold the [TUNE] button on the MFJ-993B for one second to start the automatic tuningprocess. When completed, check to ensure an SWR of 2.0 or less before increasing RF power.8. You are ready to transmit.Note:During the automatic tuning process, the tuner will make some noise. These are the relaysswitching at a very fast pace and it is normal operation. Do not be alarmed.Note:When the tuner power is OFF, the tuner is in bypass mode and RF from the transmitter goesdirectly to the antenna (ANTENNA 1) with no matching. When the tuner power is ON,pressing [C-DN] and [L-DN] simultaneously or pressing [TUNE] quickly places the tuner inbypass mode (zero inductance and zero capacitance) and indicates by the reflected needlebouncing to 20 watts.Antenna 1TransmitterAntenna 2MFJ-993B50-ohm CoaxRF Ground12 VDCFigure 1. Installation Block Diagram. 2003-2005 MFJ Enterprises, Inc.3
MFJ-993B IntelliTuner Automatic Antenna TunerInstruction ManualFront Panel60 40205001010200 1FWD 100 REF 0.53.0 2.05.0ANTSWRHi x1Lo x.1SWR1 1.2PWR 0251.5 250753100 300MODEZC-UPL-UPAUTOC-DNL-DNTUNELCDMFJ IntelliTunerTMAUTOMATIC ANTENNA TUNERPOWERVOLBYPASSDual Power Level300/150 WattsFigure 2. MFJ-993B Front Panel. SWR/Wattmeter: The cross-needle meter measures forward power, reflected power, and SWR. Itoperates whenever the tuner is power on. Full-scale readings are 300 watts forward and 60 wattsreflected. The meter can be set to low power range of 30 watts forward and 6 watts reflected. TheSWR is measured at the point where the two needles cross. See “SWR/Wattmeter” on page 10 formore detailed information. LCD Display: A 2-line by 16-character alphanumeric display. It displays the tuner’s various menusand status. The display contrast can be adjusted by the [LCD] control on the front panel. Below thedisplay are the SWR and power bar meter scales. Refer to Figures 11 and 12 for descriptions of thevarious displayed information. LCD Contrast Control: A trimpot control that adjusts the contrast of the LCD display. Use a smallflat blade screwdriver and turn clockwise to increase contrast. ANT Button: Used to select the antenna to tune. Button out selects Antenna 1; button in selectsAntenna 2. The Antenna indicator on the main display indicates the selected antenna. A balancedfeedline or a single-wire antenna is, by default, Antenna 1. Changing the [ANT] button will switchthe antenna only when there is no RF power; also, the tuner setting for the selected antenna, ifavailable, is instantly restored from memory when enabled. MODE Button: Time-sensitive and used to navigate through the various main menus and to enter orexit the setup menus. C-UP and C-DN Buttons: Used to manually increase or decrease the capacitance of the L-networkmatching circuit. The capacitance range is 0 to 3908 pF (picofarads). The upper limit of capacitance,dependent on frequency, is used to limit the maximum voltage and current across the tuner’scomponents. This limit can be removed in the LC Limit setup menu, but is not recommended.Note:4Pressing [C-UP] and [C-DN] simultaneously toggles the capacitor between the inputand output sides of the L-network. Forward needle bounces to 30 watts when thecapacitor is on the transmitter side. Reflected needle bounces to 5 watts when thecapacitor is on the antenna side. 2003-2005 MFJ Enterprises, Inc.
MFJ-993B IntelliTuner Automatic Antenna Tuner Instruction ManualL-UP and L-DN Buttons: Used to manually increase or decrease the inductance of the L-networkmatching circuit. The inductance range is 0 to 24.86 μH (microhenries). The upper limit ofinductance, dependent on frequency, is used to limit the maximum voltage and current across thetuner’s components. This limit can be removed in the LC Limit setup menu, but is not recommended.Shortcut: Press both [L-UP] and [L-DN] buttons simultaneously to toggle SWR Beep on andoff. See “SWR Beep Menu” on page 17.Note: AUTO Button: Used to select automatic or semi-automatic tuning mode. Button out selectsautomatic mode--the tuning routine is automatically started when at least 2 watts of power is appliedand the SWR is a preset amount above the preset target SWR. Button in selects the semi-automaticmode--the tuning routine starts only when the [TUNE] button is pressed. The Auto/Semi indicator onthe main display indicates the selected mode.Note: Pressing [C-DN] and [L-DN] (both DOWN buttons) simultaneously places the tuner inbypass mode. The reflected needle bouncing to the 20-watt mark indicates this. RF fromthe transmitter goes directly to the antenna with no matching.During the tuning process, the tuner will make some noise. These are the relaysswitching at a very fast pace and it is normal operation. Do not be alarmed.TUNE Button: Has three different functions based on the length of time you press and hold it beforereleasing. Press [TUNE] quickly (less than 0.5 second) to bypass the tuner. RF from the transmittergoes directly to the antenna with no matching.Press and hold [TUNE] for 0.5 to 2 seconds to start the automatic tuning process. The transmittermust be keyed first with at least 2 watts of power. When the SWR is already below the target SWR,pressing [TUNE] will fine-tune the match for a lower SWR, if possible.“StickyTune” allows for one-handed tuning operation. Normal tuning requires keying the transmitterwith one hand and using the other hand to push the [TUNE] button to start the tuning process. Totoggle the StickyTune mode on and off, press and hold the [TUNE] button for two seconds. Whenenabled, a bar appears on top of the Auto/Semi indicator, and the tuning process starts automaticallywhen the transmitter is keyed with at least 2 watts of power regardless of the SWR. This works inboth automatic and semi-automatic modes. One beep indicates on and two beeps indicate off. VOL Control: A trimpot control that adjusts the volume level of the audio SWR meter. Use a smallflat blade screwdriver and turn clockwise to increase volume level. POWER Button: Used to turn the power on and off. Note that during power-on the analog meterbounces three times (to indicate the model number, 993). When the power is off, the tuner is placedin bypass mode and Antenna 1 is selected. When turning on the power, the tuner automaticallyrestores all previous settings and displays the target SWR on the main screen.WARNING: Do not turn the power on and off rapidly, otherwise the tuning settingmemory can be corrupted and the unit will have to be reset to factory defaults.Note:When the tuner power is OFF, the tuner is in bypass mode and RF from the transmittergoes directly to the antenna (ANTENNA 1) with no matching. 2003-2005 MFJ Enterprises, Inc.5
MFJ-993B IntelliTuner Automatic Antenna TunerInstruction ManualMODE BUTTON FLOW CHARTMAIN MODES14.100MHz1.1FWD 100 REF 0.5SETUP MODESDigitalWattmeterPOWER LEVELMODETARGET SWRFor 2 sec.14.100MHzMODE14.100MHz0.00uH0pF1.1100PowerBar Meter1.1100SWRBar Meter1,0100L-NetworkAUTO TUNE SWRMETER RANGEPEAK HOLDMODEMODEFor 2 sec.orIdle for 8 sec.MEMORYIntelliTuneSWR BEEPBEEPBUTTON ACTIONREFRESH(while in the main modes)MODEPressPOWERin to turn power on, out to turn power off.PressANTPressMODEto switch main modes and setup modes.PressC-UPto increase capacitance.PressC-DNto decrease capacitance.PressL-UPto increase inductance.PressL-DNto decrease inductance.PressAUTOin to select semi-automatic mode,TUNEMODEin to select antenna 2, out to select antenna 1.C-UP L-UPLC LIMITC-UP or L-UP to turn onPressor increase setting.out to select automatic mode.Press C-DN or L-DN to turn offPressor decrease setting.less than 0.5 second to bypass the tuner; press and hold for 0.5 to 2 seconds to start thetuning process; press and hold for more than two seconds to toggle the StickyTune on and off.PressC-UP C-DNto switch the capacitor between the input and output side.PressL-UP L-DNto toggle the SWR Beep on and off.PressC-UP L-UPto increase both capacitance and inductance.PressC-DN L-DNto bypass the antenna tuner.PressTUNE C-UPto toggle the Target SWR between 1.5 and 2.0.PressTUNE L-UPto cycle the Auto Tune SWR among 0.5, 1.0 and 1.5 above the target SWR.PressTUNE C-DNto cycle the Memory among banks A, B, C and D.PressTUNE L-DNto cycle the Meter Range among 30 watts, 300 watts and auto range.PressTUNE C-UP L-UPto toggle the power level between 300 and 150 watts.PressTUNE C-DN L-DNto overwrite tuner memory with the current tuner setting.Figure 3. Mode Button Flow Chart and Button Action.6 2003-2005 MFJ Enterprises, Inc.
MFJ-993B IntelliTuner Automatic Antenna TunerInstruction ManualBack Panel*TRANSMITTERMFJ ENTERPRISES, INC.STARKVILLE, MS USABALANCED LINEPOWER12VDC1A ANTENNA 1ANTENNA 2WIREREMOTEPORTGROUNDRADIOINTERFACE*Install Jumper When UsingBALANCED LINE Antenna!Do not connect WIRE andANTENNA 1 at same time!Figure 4. MFJ-993B Back Panel. Power: This jack accepts a standard 2.1 5.5 mm coaxial plug with positive center and negativesleeve. The tuner requires 12 volts DC at up to 1 amp. The use of a regulated supply is notmandatory but is recommended for best performance. An optional 12 volts DC 1.5 amp powersupply, the MFJ-1316, is available from MFJ Enterprises,
Icom AH-3 and AH-4 tuners, Kenwood AT-300 tuner, Yaesu FC-30 tuner, and certain Yaesu radios with CAT system. Optional interface cables MFJ-5124A (for Alinco), MFJ-5124I (for Icom), MFJ-5124K (for Kenwood), MFJ-5124Y and MFJ-5124Y2 (for Yaesu) are available from MFJ Enterprises, Inc. The
Random Length Radiator Wire Antenna 6 6. Windom Antenna 6 7. Windom Antenna - Feed with coax cable 7 8. Quarter Wavelength Vertical Antenna 7 9. Folded Marconi Tee Antenna 8 10. Zeppelin Antenna 8 11. EWE Antenna 9 12. Dipole Antenna - Balun 9 13. Multiband Dipole Antenna 10 14. Inverted-Vee Antenna 10 15. Sloping Dipole Antenna 11 16. Vertical Dipole 12 17. Delta Fed Dipole Antenna 13 18. Bow .
Random Length Radiator Wire Antenna 6 6. Windom Antenna 6 7. Windom Antenna - Feed with coax cable 7 8. Quarter Wavelength Vertical Antenna 7 9. Folded Marconi Tee Antenna 8 10. Zeppelin Antenna 8 11. EWE Antenna 9 12. Dipole Antenna - Balun 9 13. Multiband Dipole Antenna 10 14. Inverted-Vee Antenna 10 15. Sloping Dipole Antenna 11 16. Vertical Dipole 12 17. Delta Fed Dipole Antenna 13 18. Bow .
Icom AH-3 and AH-4 tuners, Kenwood AT-300 tuner, Yaesu FC-30 tuner, and certain Yaesu radios with CAT system. Optional interface cables MFJ-5114A (for Alinco), MFJ-5114I (for Icom), MFJ-5114K (for Kenwood), and MFJ-5114Y, MFJ-5114Y2 and MFJ-5124Y3
Wire-Beam Antenna for 80m. 63 Dual-Band Sloper Antenna. 64 Inverted-V Beam Antenna for 30m. 65 ZL-Special Beam Antenna for 15m. 66 Half-Sloper Antenna for 160m . 67 Two-Bands Half Sloper for 80m - 40m. 68 Linear Loaded Sloper Antenna for 160m. 69 Super-Sloper Antenna. 70 Tower Pole as a Vertical Antenna for 80m. 71 Clothesline Antenna. 72 Wire Ground-Plane Antenna. 73 Inverted Delta Loop for .
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1. Connect an outdoor or indoor antenna directly to either Tuner 1 or Tuner 2 jack with a coaxial cable. This is to receive over-the-air digital TV signals from TV broadcasters. 2. Connect Cable signal source using a coaxial RF cable to either Tuner 1 or Tuner
Modifications for the ICOM created 28-03-2002 from www.mods.dk (AH-4) Icom, AH-4, AH-3 ( automatic antenna tuner ) connection to any radio. English language (AT-160) Using the AT-160 with the IC-706MKII English language (AT-500) AT-500 Automatic Antenna Tuner Modification English language (AT-500) ICOM AT-500 Tuner Hint English language (I290) Icom I290 scan modification English
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