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MFJ-993B Manual 2B

1. Instruction Manual Frequency Indicators Antenna IntelliTune Indicators Memory Power Level LC Limit Range Indicators Auto Semi StickyTune SWR Forward power in watts Reflected power in watts Forward power bar meter Reflected power bar meter SWR bar meter Antenna symbol antenna side of L network Inductance value Capacitance value when on antenna side Capacitance value when on transmitter side Figure 13 Main Mode Menus Display Tuner Indicators Various tuner indicators are shown on the main menus to indicate tuner status Refer to Figure 13 for locations of these indicators The number enclosed within is the item number of Figure 14 e Antenna A small 1 appears to indicate antenna is selected 15 a small 2 appears to indicate antenna 2 is selected 16 e IntelliTune When IntelliTune is ON a bar appears on top of the Antenna indicator 17 e Memory A small A B C or D appears to indicator the selected memory bank when Memory is ON 18 21 e Power Level When 150 watt power level is selected a bar appears on the upper left corner of the Memory indicator 22 O 2005 2012 MFJ Enterprises Inc 15 MFJ 993B IntelliTuner Automatic Antenna Tuner Instruction Manual e LC Limit When LC Limit is OFF a bar appears on the upper right corner of the Memory indicator 23 e Meter Range When Auto Range is ON a two dot vertical b
2. Press C UP or L UP to turn on or increase setting Press C DN or L DN to turn off C DN to cycle the Memory among banks A B C and D or decrease setting less than 0 5 second to bypass the tuner press and hold for 0 5 to 2 seconas to start the tuning process press and hold for more than two seconds to toggle the StickyTune on and off C DN to switch the capacitor between the input and output side L UP to cycle the Auto Tune SWR among 0 5 1 0 and 1 5 above the target SWR L DN to cycle the Meter Range among 30 watts 300 watts and auto range C UP L UP to toggle the power level between 300 and 150 watts C DN L DN to overwrite tuner memory with the current tuner setting Figure 3 Mode Button Flow Chart and Button Action O 2005 2012 MFJ Enterprises Inc MFJ 993B IntelliTuner Automatic Antenna Tuner Instruction Manual Back Panel TRANSMITTER ANTENNA 1 ANTENNA 2 MFJ ENTERPRISES INC 7 STARKVILLE MS USA Z Y o BALANCED LINE WIRE o 0 O rose r A A 1A GROUND O A Z RADIO Do not connect WIRE and INTERFACE Install Jumper When Using ANTENNA 1 at same time BALANCED LINE Antenna Figure 4 MFJ 993B Back Panel e Power This jack accepts a standard 2 1 x 5 5 mm coaxial plug with positive center and negative sleeve The tuner requires 11 15 volts DC at up to 1 amp The use
3. e AUTO Button Used to select automatic or semi automatic tuning mode Button out selects automatic mode the tuning routine is automatically started when 2 10 watts of power is applied and the SWR is a preset amount above the preset target SWR Button in selects the semi automatic mode the tuning routine starts only when the TUNE button is pressed for 0 5 2 seconds The Auto Semi indicator on the main display indicates the selected mode O 2005 2012 MFJ Enterprises Inc 5 MFJ 993B IntelliTuner Automatic Antenna Tuner Instruction Manual TUNE Button Has three different functions based on the length of time you press and hold it before releasing Press TUNE quickly less than 0 5 second to bypass the tuner RF from the transmitter goes directly to the antenna with no matching Press and hold TUNE for 0 5 2 seconds to start the automatic tuning process The transmitter must be keyed first with at least two 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 transmitter with one hand and using the other hand to push the TUNE button to start the tuning process unless a transceiver interface cable is installed When StickyTune is enabled a bar appears on top of the Auto Semi indicator and the tuning process starts automatically when the transmitter is keyed w
4. Inc MFJ 993B IntelliTuner Automatic Antenna Tuner Instruction Manual The Menus Main Mode Menus The main mode menus show various tuner settings and status There are four main mode menus arranged in a wrap around structure When powered on tuner operation starts with the main menu that was last used Within each main menu press the MODE button briefly to view the next main menu Press and hold the MODE button for two seconds to enter the setup mode see below Various tuner indicators are shown on all four main menus Antenna 1 2 IntelliTune Memory Power Level LC Limit Meter Range Auto Semi and StickyTune Refer to Figures 13 and 14 for details on the displayed information Note In sideband mode the frequency readout on the tuner display jumps around to different frequencies while transmitting and stops on another frequency when un keyed This is normal and is a characteristic of sideband mode because sideband signals jump up and down in frequency and power Note In bypass mode the decimal point in the SWR reading is replaced with a comma Digital Wattmeter Menu Shows the frequency SWR and forward and reflected power in watts Power Bar Meter Menu Shows the frequency SWR forward power and bar meters for forward and reflected power The top bar meter is the forward power and the bottom bar meter is the reflected power The numeric reading of forward power appears at the end of the bar meters A
5. Installation EE SWR Wattmeter cccccccsssssccccccsscssevssscccsessscsssssscceeessess THE MENUS Main Mode Menu Digital Wattmeter Menu Power Bar Meter Men SWR Bar Meter Menu L Network Men TUNEL INCICAOTS unid eebe KEE 2005 2012 MFJ Enterprises Inc Instruction Manual Contents MFJ 993B IntelliTuner Automatic Antenna Tuner Instruction Manual Meter ROBE A A AAA a a Al 16 AMO CMM EE 16 Sticky TEE 16 Setup Mode MEUS ii ias 17 Power Level Menu pdas 17 Jager WR Meuse ed ee ee 17 Alito Tune IV REM OU cin A lend uay P aa ad amaya E 18 M teriRaneeMenUu e ra us u na a a a N EE 18 Peak Hold Menu TEE 18 Memory M eT use l n Su ee AE aD aa aaa 18 TntellET ne Menus ae eege Deeg Ee EE 19 ANE MENU EE 20 Beep Mei vi caida 20 Refresh Me ta a ERT d 20 Power On Reset POR Sticky Tune Mem 20 PC Limit Me ms lacio 20 OPERATION Manta TIAS A eege ee ee dE 21 Meter Codes and Audible Beepsu n na eneen Oe ete esis eda enee 21 Transceiver Foldbadkai A Eege 23 Grounding Hints incoloro iria 23 Antenna Systemi ts aaa iia 24 Coaxial Cable Sel ctrom cito alto inet din mk uyu dsd u tasas 24 ET e KEE 24 Matching Problems usina 25 APPENDICES Resetting the TU ii A A t SASS E EA 26 Bactory Dal e u ceases cee E Sas 26 Delete Antenna Memor 27 Total Rea iaa ea 27 Self KE E 27 Power Down Circuit Tetuan cus aaa Ed Ed ARA da E 29 Rel K E
6. and L UP buttons simultaneously to toggle the power level between 300 and 150 watts Refer to Table 2 for meter code Target SWR Menu Allows you to set the target SWR from 1 0 to 2 0 The tuning process will stop when a match with an SWR less than or equal to the target SWR is found Setting the target SWR lower than 1 5 may result in longer tuning times The target SWR is shown on the initial display when the tuner is powered on Default is 1 5 Shortcut Press both TUNE and C UP buttons simultaneously to toggle the target SWR between 1 5 and 2 0 which is indicated by the meter SWR scale Refer to Table 2 for meter code 2005 2012 MEI Enterprises Inc 17 MFJ 993B IntelliTuner Automatic Antenna Tuner Instruction Manual Auto Tune SWR Menu Allows you to set the SWR threshold in the range 0 5 to 1 5 In the automatic mode the tuning process will automatically start when the SWR is above the target SWR by this amount of SWR threshold For example for target SWR of 1 5 and auto tune SWR of 0 5 the tuning process will start whenever the SWR rises above 2 0 1 5 0 5 and there is at least two watts of RF power applied Default is 0 5 Shortcut Press both TUNE and L UP buttons simultaneously to cycle the auto tune SWR among 0 5 1 0 and 1 5 Refer to Table 2 for meter code Note The AUTO button should always be IN semi automatic unless a compatible radio interface cable is connected between the MFJ 993B and
7. knob to recall Menu 61 TUNER ATAS and then rotate the Main Dial to change the setting to tunEr Press the FUNC key momentarily to save the new setting and exit to normal operation d Turn the FT 100 s power off then on again to re initialize the radio regarding the tuner status Turn the radio off Insert the 3 5 mm stereo phone plug into the tuner s RADIO INTERFACE jack Insert the 2 1 x 5 5 mm coaxial power plug into the tuner s POWER jack Insert the 8 pin modular plug into the MFJ 5124 s TO RADIO jack Important Make sure the DC power to the radio has been turned off The radio does not fuse the DC power to the tuner and damage to the radio can occur if the interface s power connection comes in contact with ground Connect the 8 pin mini DIN connector to the mating 8 pin mini DIN connector at the end of the BAND DATA cable pigtail on the back of the radio Push the POWER button on the tuner to the in position and then power on the radio Operation for FT 100 The operation of the MFJ 5124Y radio interface is similar to the operation of the FC 20 described in the Y aesu radio s operating manual 1 2 Press the FUNC key as needed to recall Operating Function Row 7 MTR TUN PRO VOX Press the B TUN key on the radio for Y second to turn the external tuner function on the TUN icon will appear bolded in the radio s display Press and hold the B TUN key on the radio to begin
8. active for the first tune only Then it will turn off StickyTune can be enabled by cycling power with POR Sticky Tune set to ON or by pressing TUNE for more than two seconds M LC Limit Menu The upper limits of inductance L and capacitance C are factory limited according to frequency and maximum power rating 1 e higher frequencies need less inductance and less capacitance when the L network is properly tuned Pressing C UP and or L UP allows capacitance and inductance to be increased only to these limits When a selected capacitance or inductance is higher than its allowed limit and the frequency is changed that selection is automatically reduced to the value of its limit These limits are used to prevent matching of extreme load impedance outside the tuner s specification which may result in excess voltage and or current across the tuner s components This setting is not stored in non volatile memory and reverts back to the default when the tuner power is turned off Refer to Figures 13 and 14 for the on screen LC Limit indicator Default is ON Note If this feature is turned OFF it will be re set to ON whenever power is cycled 20 2005 2012 MFJ Enterprises Inc MFJ 993B IntelliTuner Automatic Antenna Tuner Instruction Manual Operation Manual Tuning Manual tuning may be used to touch up the tuner s settings For example if the target SWR is set at the default of 1 5 the tuner will stop when a
9. and the transmitter 14 15 16 MFJ 993B IntelliTuner Automatic Antenna Tuner Instruction Manual Remove the cover from the tuner 12 screws with a Phillips screwdriver Connect the 50 ohm dummy load to the ANTENNA 1 connector connect the wattmeter between the transmitter and the TRANSMITTER connector on the tuner Turn on the power to the transmitter Using a frequency in the middle of the HF band such as 7 253 MHz for calibration is recommended Press and hold both the C UP and L UP buttons while turning the tuner power on A message will display and both meter needles will bounce Key the transmitter to output 100 watts and adjust trimmer capacitor C91 for minimum reflected power Notice the reflected meter movement is exaggerated for easier calibration Key the transmitter to 100 watts output and adjust the FWD trimpot R72 until the display shows forward power of i watts The forward meter gle should indicate 100 watts Press the TUNE button A message displays and the reflected meter goes to full scale Turn off the transmitter and reverse the ANTENNA 1 and TRANSMITTER connections that is connect the 50 ohm dummy load to the TRANSMITTER connector and connect the transmitter wattmeter to the ANTENNA 1 connector Turn on the transmitter s power Key the transmitter to 100 watts output and adjust the REF trimpot R71 until the display shows reflected power of Fiz Ed watts The forward meter yes the forward meter also
10. high and auto range press the TUNE and L DN buttons simultaneously The forward needle will read 300 for high range 30 for low range and 100 for auto range until the buttons are released When auto range is enabled a two dot vertical segment low range or a three dot vertical segment high range appears in the lower right corner of the Range indicator on the main LCD screen One beep indicates high range is selected two beeps indicate low range three beeps indicate auto range Refer to Figures 13 and 14 for the on screen Range indicator SWR is calculated from the forward and reflected power reflected A measurements as shown by the equation at the right The SWR is 1 SE read from the eight red SWR curves ranging from 1 0 to infinity SWR forward power by observing the point where the forward and reflected power SS JE power needles cross on the red curved scales across the center of the meter No cumbersome or time consuming SWR sensitivity adjustments are required with this meter Figure 9 shows an SWR of approximately 2 0 forward power The meter also indicates various operational states of the tuner Refer to Meter Codes and Audible Beeps on page 21 for more details The MFJ 993B also includes an SWR bar meter and an audio SWR indicator selectable by pressing L UP and L DN buttons simultaneously It also has bar meters for forward and reflected power 12 2005 2012 MFJ Enterprises
11. is pushed MFJ recommends that the Yaesu tune power setting be set to 20 watts Yaesu menu 145 tGEn TUN PWR during the tune process Refer to Yaesu Radio Interface MFJ 5124Y4 on pages 41 42 for connections and operation GND O Center pin KEY connects to the Tip of 3 5 mm Stereo Phone Plug O Ground GND connects to the Sleeve of 3 5 mm Stereo Phone Plug Figure 8 Yaesu Interface Cable FT 2000 5000 series O 2005 2012 MFJ Enterprises Inc MFJ 993B IntelliTuner Automatic Antenna Tuner Instruction Manual e Transmitter SO 239 connector for coax cable from transceiver or amplifier e Ground Wing nut terminal for RF ground wire connection e Balanced Line Two binding posts for connecting balanced line antennas To use balanced line antenna install a jumper as shown to the WIRE binding post e Wire Binding post for connecting single wire antennas The WIRE binding post is internally connected to the ANTENNA 1 connector Note When using the WIRE binding post there should be no coax cable connected to the ANTENNA I connector e Antenna 1 SO 239 connector for coax cable from antenna The ANTENNA 1 connector is internally connected to the WIRE binding post Note When using the ANTENNA I connector there should be no jumper and no wire attached to the WIRE binding post e Antenna 2 SO 239 connector for coax cable from antenna Installation WARNING Never operate the tuner with its cover removed C
12. new setting and exit to normal operation If you press the MNU key momentarily the new setting will not be saved 2 Insert the 3 5 mm stereo phone plug into the MFJ 993B RADIO INTERFACE jack 3 Connect the 3 5 mm mono plug on the MFJ 5124Y3 to the REMOTE jack on the rear panel of the transceiver 4 Connecta 12V 1000 mA DC source to the MFJ 993B 5 Push the POWER button on the MFJ 993B to the in position The radio may be powered on either before or after the tuner is powered on Operation for FTpx 9000 series of radios The transceiver is controlled by the MFJ 993B To operate 1 Press the TUNE button on the MFJ 993B for 4 2 seconds to initiate the tuning process The radio will automatically transmit a low power carrier and start the tuning process When tuning is completed the radio will stop transmitting and you will be ready for operation on this frequency Yaesu Radio Interface MFJ 5124Y4 The MFJ 5124Y4 radio interface allows users of Yaesu FT 2000 series and FTpx 5000 series transceivers to connect to the MFJ 993B IntelliTuner Automatic Antenna Tuner With this interface control signals are connected between the radio and the tuner The operator can then control the tuner and radio with a single push of the TUNE button on the front panel of the MFJ 993B Connections for FT 2000 series of radios 1 Before connecting the MFJ 5124Y4 to your radio set the maximum TUNE power of the radio as follows On your tr
13. of a regulated supply is not mandatory but is recommended for best performance An optional 12 volts DC 1 5 amp power supply the MFJ 1316 is available from MFJ Enterprises Inc WARNING Do not apply voltages greater than 18 volts to this unit or permanent damage may result Note When the tuner power is OFF the tuner is bypassed and RF from the transmitter goes directly to the antenna ANTENNA 1 with no matching When turned on the tuner powers up in bypass mode e Remote Port A female DB 9 connector for connecting to the MFJ 993RC Remote Control allowing remote operation of the tuner The MFJ 993RC duplicates all the front panel buttons except POWER and MODE In addition there are two LEDs on the remote control The red Tuning LED lights to indicate tuning is in progress and the green SWR LED lights when the SWR is below the target SWR Note To use the MFJ 993RC remote control both the ANT and AUTO buttons on the MFJ 993B automatic tuner must be locked in otherwise Antenna I and Automatic mode are selected e Radio Interface A 3 5 mm stereo phone jack for connecting to the tuner interface connector of compatible radios Most radios provide 13 8 VDC power through the tuner interface connector If separate power supplies are used to power the MFJ 993B the MFJ 993B should be powered on first for certain radios NES 2 will display and both needles will bounce so the radio knows an external tuner is attached The
14. on and off The memory resolution is the width of frequency spectrum that the tuner recognizes as being the same as a tuned frequency already in memory The memory resolution is approximately 0 1 percent of the lower frequency of each amateur band For example the memory resolution on the 40 meter band 7000 to 7300 kHz is 7 kHz if the tuner has memorized a setting for 7050 kHz it will automatically call up this setting for any frequency from 7047 to 7053 kHz Memory resolution is smaller at lower frequency to accommodate the higher antenna Q and larger at higher frequency where the antenna Q is lower The memory resolutions for the HF amateur bands are 18 2005 2012 MFJ Enterprises Inc MFJ 993B IntelliTuner Automatic Antenna Tuner Instruction Manual Meter Frequency Range kHz Memory Resolution kHz 160 1800 2000 2 75 80 3500 4000 4 60 5330 5 5346 5 5366 5 5371 5 and 5403 5 5 memory locations 40 7000 7300 7 30 10100 10150 10 20 14000 14350 14 17 18068 18168 18 15 21000 21450 21 12 24890 24990 25 10 28000 29700 28 Table 1 Memory Resolution The memory resolution for non amateur frequency bands between 160 and 10 meters is approximately 0 2 percent of the lower frequency of that band There are over 2500 memory locations for each memory bank and each antenna has four memory banks A D Tuner settings are stored in memory separately for An
15. power scale is printed just below the display on the front panel Each power bar meter is consisted of 60 bar segments When in the high power range each vertical bar segment consists of three dots Below 100 watts each bar segment represents two watts above 100 watts each bar segment represents 20 watts The forward bar meter has a peak hold feature The peak meter hold function freezes the highest displayed bar segment of the forward power for about one second so that you can more easily read the meter This function can be turned ON and OFF in the Peak Hold setup mode For low power tuning meter range of 30 watts is available When in the low power range divide the readings on the printed power scale by ten and each vertical bar segment consists of two dots Below 10 watts each bar segment represents 0 2 watt above 10 watts each bar segment represents two watts Refer to the SWR Wattmeter section on page 12 for more details on power range The power meter can be set to auto range Auto range automatically sets the meter scale according to the input RF power to the tuner Forward power greater than 30 watts or reflected power greater than six watts automatically sets the meter to the high power range Forward power less than 25 watts and reflected power less than four watts automatically set the meter to the low power range When auto range is enabled a two dot vertical segment appears on the on screen tuner indicator Refer to Fig
16. relay on and off Press button to engage the relay and release it to disengage the relay Listen for relay clicks Press the TUNE button to proceed to the next group of four relays There are 19 relays in the tuner Repeat the above procedure to test all the relays Normal operation is resumed after this test Firmware Version Number via Meter Make sure the meter is calibrated The firmware version number is shown in the copyright message of the self test To obtain a decimal firmware version number via the meter press and hold the C UP button while turning the power on The version number X YY is represented by the meter forward needle for X forward reading 10 and the reflected needle for YY reflected reading For example forward needle on 10 watt mark and reflected needle on 20 watt mark represent firmware version number 1 20 Release button to resume normal operation 2005 2012 MFJ Enterprises Inc 29 MFJ 993B IntelliTuner Automatic Antenna Tuner Instruction Manual Setting the Speaker Volume To set the speaker volume press and hold both the L UP and L DN buttons while turning the power on The message i will display and send as Morse code repetitively Insert a small flat blade screwdriver into the VOL hole on the front panel to adjust the volume level Turn clockwise to increase volume level Turn the power off Wattmeter Calibration To calibrate the meter needles you will need a Phillips screwdriver and a t
17. should indicate 100 watts the reflected meter is at full scale Press the TUNE button to end calibration Remove the transmitter wattmeter and the 50 ohm dummy load from the tuner Secure the cover back onto the tuner Connect your transmitter to the TRANSMITTER connector and connect your antenna to the appropriate antenna connector on the tuner Frequency Counter Calibration To calibrate the frequency counter you will need a transmitter a 50 ohm dummy load two 50 ohm SO 239 coax cables a Phillips screwdriver and a tuning tool or small flat blade screwdriver WARNING Do not touch anything inside the tuner during operation Serious painful RF burns can result WARNING Never operate the MFJ 993B with its cover removed dangerous voltages and currents can be present during operation Never exceed tuner specifications Turn off the power to the tuner and the transmitter Remove the cover from the tuner 12 screws with a Phillips screwdriver Connect the 50 ohm dummy load to the ANTENNA 1 connector connect the transmitter to the TRANSMITTER connector on the tuner Turn on the power to the transmitter Set and lock the frequency to exactly 29 000 MHz Press and hold both the C DN and L DN buttons while turning the tuner power on Both meter needles will go to full scale and a message will display Key the transmitter to output about 10 watts Adjust trimmer capacitor C118 located between the two big
18. th 8 Before connecting the MFJ 5124Y to your radio follow the instructions in the radio s manual for installing the FC 40 automatic antenna tuner Press the MENU button momentarily to enter the Menu mode b Rotate the SELECT knob to select Menu item 110 TGEN EXT TUN Press the SELECT knob momentarily to toggle the display between 110 TGEN and EXT TUN c Rotate the CLAR VFO B knob to change the setting to Etu to enable the External Tuner d Press and hold the MENU button for one second to save the new setting and exit to normal operation If you only momentarily press the MENU button the new setting will not be retained Turn the radio off Insert the 3 5 mm stereo phone plug into the tuner s RADIO INTERFACE jack Insert the 2 1 x 5 5 mm coaxial power plug into the tuner s POWER jack Insert the 8 pin modular plug into the MFJ 5124 s TO RADIO jack Important Make sure the DC power to the radio has been turned off The radio does not fuse the DC power to the tuner and damage to the radio can occur if the interface s power connection comes in contact with ground Connect the 8 pin mini DIN connector to the mating 8 pin mini DIN connector marked as TUNER on the back of the radio Push the POWER button on the tuner to the in position and then power on the radio Operation for FT 950 The operation of the MFJ 5124Y radio interface is similar to the operation of the FC 40 described in the
19. the SWR the lower the power is set to prevent damage However even if your transceiver has a foldback circuit you should manually set the power level to 20 watts or less for tuning Even with foldback the tuning process can be hard on your transceiver s finals When an amplifier is used the amplifier must be bypassed during tuning Note MFJ recommends that a transceiver specific interface cable be used between the MFJ 993B and your transceiver to ensure that tuning only occurs at low power Grounding Hints To minimize RFI single wire feedlines such as used with Windom or longwire antennas should be kept away from other wiring Radiation will be minimized if the single wire feeder runs parallel and reasonably close to the wire that connects the tuner to the outdoor ground The antenna feed wire should be adequately insulated to prevent arcing or accidental contact 2005 2012 MFJ Enterprises Inc 23 MFJ 993B IntelliTuner Automatic Antenna Tuner Instruction Manual CAUTION For operator safety a good outside earth ground or water pipe ground should always be installed and connected to the case of the MFJ 993B Make certain the safety ground also connects to the transmitter and other station accessories A wing nut post marked GROUND is provided for ground connections For safety always use good DC and RF grounds It is particularly important to have a good RF ground when using a single wire feeder since t
20. the tuner The best way to operate 160 meters with an 80 or 40 meters antenna is to load either or both feedline wires in parallel as a longwire The antenna will act like a T antenna worked against station ground 2005 2012 MEI Enterprises Inc 25 MFJ 993B IntelliTuner Automatic Antenna Tuner Instruction Manual Appendices POWER ON OPERATIONS Press and hold buttons while turning on the power Press and hold POWER to get the firmware version number Press and hold POWER to start the self test Press and hold POWER to test the relays Press and hold POWER to test the power down circuitry Press and hold J J POWER to calibrate the wattmeter Press and hold POWER to output audio for volume adjustment Press and hold POWER to calibrate the SWR bridge Press and hold J L J POWER to calibrate the frequency counter Press and hold POWER to delete the selected antenna memory Press and hold POWER to reset factory defaults Press and hold POWER to perform total reset Resetting the Tuner Each time the tuner is powered off the microprocessor saves all memories and configurations to non volatile memory When the power is off the tune
21. 0 watts when 150 watts power level is selected is applied to the tuner the tuner will go into bypass mode flash three times and send QRT dah dah di dah di dah dit dah on CW If the tuning process is activated under these conditions the tuner will not start the tuning It will indicate the appropriate bounce code on the meter and display a warning message on the LCD 22 2005 2012 MEI Enterprises Inc MFJ 993B IntelliTuner Automatic Antenna Tuner Instruction Manual Meter Needle Bounce Codes Meter needles bounce to the indicated mark until buttons are released 30 Watts Mark 100 Watts Mark 300 Watts Mark Capacitor Insufficient Power to Power Too High to Tune Switches To Forward gt 125 Watts or Transmitter Side Forward gt 75 2 beeps Reflected 5 Watts Mark 20 e Mark 60 Gan Mark Capacitor Bypass Mode L or C at Its Limit During Switches To L 0andC 0 Manual Adjustment Antenna Side 1 beep at lower limit 1 beep 1 beep 2 beeps at upper limit Both Needles 30 5 Marks 100 20 Marks 300 60 Marks Not Used Not Used Power Overload Forward gt 300 or 150 Watts Table 3 Meter Needle Bounce Codes Transceiver Foldback Modern transceivers with solid state finals usually have a foldback circuit to protect the final transistors from damage due to high SWR A foldback circuit detects the SWR during transmit and reduces the output power as the SWR rises above a preset threshold usually 2 1 The higher
22. 100 watts maximum 25 watts AM when the radio interface is used Note For the TS 2000 use the ANT 1 and AT connectors on the radio to connect an external antenna tuner If the external tuner is connected to the ANT 2 connector on the radio the external tuner will not function with the radio interface O 2005 2012 MFJ Enterprises Inc 9 10 MFJ 993B IntelliTuner Automatic Antenna Tuner Instruction Manual The MFJ 5124Y interface provides power and control signals between a Yaesu radio and the MEI automatic tuner Supported Yaesu radios are FT 100 FT 450 FT 857 FT 897 FT 950 and any Yaesu radio that supports the Yaesu FC 30 tuner Push and hold the radio s TUN or TUNE key to start the tuning process Refer to Yaesu Radio Interface MFJ 5124Y on pages 35 to 38 for connections and operation The MFJ 5124Y2 interface provides control but not power between a Yaesu radio and the MFJ automatic tuner Supported Yaesu radios are FT 847 and any Yaesu radio with a compatible CAT system Push the TUNE button on the tuner for 0 5 to 2 seconds to start the tuning process Refer to Yaesu Radio Interface MFJ 5124Y2 on page 39 for connections and operation The MFJ 5124Y3 interface provides control but not power between a Yaesu radio and the MFJ automatic tuner Supported Yaesu radios are FT 1000MP FT 1000MP MKV FT 1000MP MKV Field FTpx 9000 and any Yaesu radio compatible with the Yaesu FH 1 or FH 2 Remote Contr
23. 4 Tuner Indicators da deeg Ee Seege ege teg e 16 Figure 15 Power On Operations ccoo nono nono nono nnnonn cnn naar rra nr nar r rn ron rrnn ran cra nos 26 Figure 16 MFJ 993B Circuit Block Diagram ooonnccinconocononoconoconoconoconnconncnnnonancon ccoo nononcconoconanns 44 O 2005 2012 MFJ Enterprises Inc 111 MFJ 993B IntelliTuner Automatic Antenna Tuner Instruction Manual TABLES Table 1 Table 2 Table 3 Table 4 iv Memory Resolution nasus nasa 19 Meter Needle Stationary Codes c ccccecccesssesssessseesecesecesecesecsseeseeeseeeeeeeseaeeeseeeseeeeeenaes 22 Meter Needle Bounce Codes innne eriin ea ei SE ninais 23 Failure MESA a s ana dee EE 28 2005 2012 MFJ Enterprises Inc MFJ 993B IntelliTuner Automatic Antenna Tuner Instruction Manual The Basics Introduction The MFJ 993B IntelliTuner lets you rapidly tune unbalanced balanced or single wire antenna automatically 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 InstantRecall IntelliTune and AdaptiveSearch algorithms give you fast automatic tuning with more than 20 000 non volatile VirtualAntenna memories Each of the two antennas has four banks of memory each memory bank has over 2500 non volatile memories for tuner settings The MFJ 993B Int
24. 600 ohms 300 watts or 6 to 3200 ohms 150 watts SWR matching range Up to 8 1 for lt 50 ohms and up to 32 1 for gt 50 ohms 300 watts Up to 8 1 for lt 50 ohms and up to 64 1 for gt 50 ohms 150 watts Minimum power for tuning 2 watts optimum SWR tuning accuracy occurs at 10 20 watts Maximum power while tuning 100 watts with foldback 20 watts without foldback RF power limit 300 watts SSB CW Frequency range 1 8 to 30 MHz continuous coverage Frequency counter accuracy 1 kHz across HF bands Capacitance range 0 to 3908 pF nominal 256 values Inductance range 0 to 24 86 uH nominal 256 values Relay rating 16 amp 1000 volts Relay electrical life 100 000 operations Relay mechanical life 10 million operations Memory endurance 1 million erase write cycles Memory data retention gt 200 years Power supply requirements 12 15 volts DC Current consumption 1 amp or less Dimensions connectors not incl 10 1 x 2 8 x 9 2 in 257 x 71 x 234 mm w x h x d Weight Approx 3 9 lb 1 77 kg Specifications and design are subject to change without notice O 2005 2012 MFJ Enterprises Inc MFJ 993B IntelliTuner Automatic Antenna Tuner Instruction Manual Fast Start WARNING Never operate the tuner with its cover removed Contact with the components inside the tuner while transmitting will result in painful RF burns Locate the tuner so that the rear terminals are not accessible during operation The
25. A 1 Note Route all random wire antennas safely to prevent RF burn hazard e For a balanced feedline open wire twinlead or twin axial lines place a jumper wire as indicated on the back panel and connect the balanced feedline to the BALANCED LINE binding posts This antenna becomes ANTENNA 1 See Antenna System Hints on page 24 4 A GROUND post is provided for an RF ground connection See Grounding Hints on page 23 5 Connect a 12 to 15 VDC power source to the input jack labeled POWER SWR Wattmeter The backlit cross needle meter measures forward power reflected power and SWR and operates whenever the tuner is powered on Forward power up to 300 watts is displayed on the left hand FORWARD meter scale Reflected power up to 60 watts is read on the right hand REFLECTED meter scale For low power tuning meter ranges of 30 watts forward and 6 watts reflected are available Divide the readings on these scales by ten when in the low power meter range Figure 9 SWR Wattmeter The meter can be set to low high or auto range Auto range automatically sets the meter scales according to the input RF power to the tuner Forward power greater than 30 watts or reflected power greater than six watts automatically sets the meter to the high power range Forward power less than 25 watts and reflected power less than four watts automatically set the meter to the low power range To cycle the meter range among low
26. EE E E E 29 Firmware Version Number via Meter 29 Setting the Speaker Volume a rinnat ahua aie ANERE Se 30 Wattmeter Calibrations mu s l u i sa ana EE E a dal ideada A a baa su 30 SWR Bridge Calibracion ind dad ia tt da 30 Frequency Counter Calibration cccccccccccssecsseesceessecssecssecesecesecesecssecseeseeeseeeceaeeeseeeseesseeenaeeneeaas 31 Al nco Radio Interface eseou dai Eed ANE 32 CONMECHONS a 32 Operation ee ee ee D e ee 32 Icom Radio Interface noticia iapun ise deis 33 BEE 33 Operation A A AA ee Eed de 33 Kenwood Radio tea na 34 CONNECT 34 H 2005 2012 MFJ Enterprises Inc MFJ 993B IntelliTuner Automatic Antenna Tuner Instruction Manual OPM 2 A A E 34 Yaesu Radio Interface MEJ S 124 Y iregi rirerire eet i E E EE E i 35 Connections for HT 1O0 nono nonnn oran r ran ronnrrnnrronnron nana nnnnnnns 35 Operation for ETA ii u a aN Shu uq si bua aa aS 35 Connections for A E s o agan da 36 Operation Tor Eh am ana na Maa Ee aqa 36 Connections for FT 857 or ET 37 Operation for FT 857 or FT ROT 37 Connections Tor ET iii da a a Es 38 Operation tor FT Mi a 38 Yaesu Radio Interface MFJ 5124Y2 n nanas 39 Connections for RE EE 39 Operation for RE E 39 Yaesu Radio Interface MFJ 5124Y3 n nanus 40 Connections for FT 1000MP series of radios a 40 Operation for FT 1000MP series of rad
27. ER button on the tuner to the in position and then power on the radio Operation The operation of the MFJ 5124A radio interface is similar to the operation of the EDX 2 described in the Alinco operating manual 1 Push the TUNE button on the radio to initiate automatic tuning process for DX 70 press FUNC then TUNE The radio will automatically switch to CW mode transmit a 10 watt carrier and start the tuning process TUNE appears in the radio s LCD while tuning do not change the frequency or mode while tuning When the tuning process is completed the radio will stop transmitting return to its previous mode and power setting TUNE disappears Note the TUNE button on the tuner will also key the Alinco radio interface 32 2005 2012 MFJ Enterprises Inc MFJ 993B IntelliTuner Automatic Antenna Tuner Instruction Manual Icom Radio Interface The MFJ 51241 radio interface allows users of AH 3 or AH 4 compatible Icom transceivers to connect to the MFJ 993B IntelliTuner Automatic Antenna Tuner With this interface power and control signals are connected between the radio and the tuner The operator can then control the tuner with a single push of the TUNER button on the front panel of the radio Supported Icom radios are IC 706 IC 707 IC 718 IC 728 IC 736 IC 738 IC 746 IC 756 IC 7000 and any Icom radio that supports the Icom AH 3 or AH 4 tuner Note The KEY connection of the MFJ 993B RADIO INTERFACE
28. MFJ 993B IntelliTuner Automatic Antenna Tuner Instruction Manual Power Down Circuit Test When the 12 VDC power to the tuner is turned off the tuner saves all settings to non volatile memory The Power Down Circuit Test checks the power down detection circuitry It is recommended that this test be done immediately after the regular self test described above Note The tuner must be reset to factory defaults before performing this test Here is the test procedure Make sure power to the tuner is off If the tuner has been reset to factory defaults skip to step 6 otherwise continue with step 3 Press and hold both the TUNE and e DN buttons while turning the power on Release both buttons when i appears on the display Turn the power off Press and hold only the L DN button while turning the power on If the power down detection circuitry is okay a repetitive message will be displaye and sent as Morse code di dah dah dit di dah di di dit di di dit If there is a problem message will be displayed and sent as Morse code repetitively 8 Turn the power off SOY SRO TOS Relay Test To test the relays ol circuitry press and hold the C DN button while turning the power on The messag will appear Four numbers representing the relays will be shown in the center of the display The C UP L UP C DN and L DN buttons corresponding to the position of the relay numbers on the display are used to toggle each
29. MH IntelliTuner Automatic Antenna Tuner Model MFJ 993B AKT Ri He 4 Se et MEI Automatic Antenna Tuner 300 Watts PEP SSB 150 Watts CW 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 VERSION 2B COPYRIGHT c 2005 2012 MFJ ENTERPRISES INC 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 993B IntelliTuner Automatic Antenna Tuner THE BASICS MUOIO EE EE een aset pa Ee Ee N erter eege SWRiWattmeter a a anus E ECD Display ii aia LCD Contrast Control ANT Button ege ees eebe Ee MODE Button variadas EE C UP and C DN Buttons L UP and L DN Buttons AUTO BOB tad TUNE Button nl SQ a ENNEN Stickylune en VOL COMO li Zaa S Su tue tri POWER Button aasan usan aa usa Back Panel EEN
30. MP series and FTpx 9000 series MFJ 5124Y4 Interface cable for Yaesu FT 2000 series and FTpx 5000 series MFJ 5409 6 feet long RS 232 cable female DB 9 to male DB9 connector MFJ 5803 3 feet long RG 58 A U 50 ohm coax cable with a PL 259 connector on each end MFJ 5806 6 feet long RG 58 A U 50 ohm coax cable with a PL 259 connector on each end MFJ 5818 18 feet long RG 58 A U 50 ohm coax cable with a PL 259 connector on each end 2005 2012 MFJ Enterprises Inc 43 Instruction Manual MFJ 993B IntelliTuner Automatic Antenna Tuner SOU oipey Hod louir JOYIUISUBA urer8 tq 190 noro g 66 dIN 91 m8r4 a9ee u Jasn Gb 9 uln oA EE 1 1 LUNOAA suong ejdsig deiere ysnd On YMS gt ouan J9 OJJUODOJDIN SJ AUq gt Aejoy IOMION 7 sei 3d 006 0 siolloedeo f Jajuno AouanbaJy JOSU9S YMS JOSU9S aouepeduy HN 2 0 syojonpu Ae O punog aur paouejeg eBuuajuy O 2005 2012 MFJ Enterprises Inc 44 LIMITED 12 MONTH WARRANTY MFJ Enterprises Inc warrants to the original owner of this product if manufactured by MFJ Enterprises Inc and purchased from an authorized dealer or directly from MFJ Enterprises Inc to be free from defects in material and workmanship for a period of 12 months from date of purchas
31. Ring of 3 5 mm Stereo Phone Plug Figure 5 Alinco Interface Cable The MFJ 5124l interface cable provides power and control signals between an Icom radio and the MFJ automatic tuner Supported Icom radios are IC 706 IC 707 IC 718 IC 728 IC 736 IC 738 IC 746 IC 756 IC 7000 and any Icom radio that supports the Icom AH 3 or AH 4 tuner Push and hold the radio s TUNER button for two seconds to start the tuning process Push TUNER quickly to bypass the tuner Refer to Icom Radio Interface on page 33 for connections and operation Pin 1 Key connects to the Tip of 3 5 mm Stereo Phone Plug O Pin 2 Start connects to the Ring of 3 5 mm Stereo Phone Plug Pin 3 13 8V connects to the Center Pin of Power Plug O Pin 4 Ground connects to the Sleeves of both 3 5 mm Stereo Phone Plug and Power Plug Figure 6 Icom Interface Cable The MFJ 5124K interface provides power and control signals between a Kenwood radio and the MFJ automatic tuner Supported Kenwood radios are TS 50S TS 450S TS 480HX TS 570S TS 590S TS 690S TS 850S TS 870S TS 2000 and any Kenwood radio that supports the Kenwood AT 300 tuner Push and hold the radio s AT TUNE button for one second to start the tuning process Push the AT TUNE quickly to bypass the tuner or to cancel tuning in progress Refer to Kenwood Radio Interface on page 34 for connections and operation Note The TS 480HX will automatically reduce its TX power to
32. T TUNE button on the radio for one second to initiate automatic tuning process The radio will automatically switch to CW mode transmit a 10 watt carrier and start the tuning process When the tuning process is completed the radio will stop transmitting return to its previous mode and power setting 2 Press the AT TUNE button on the radio quickly to bypass the tuner some Kenwood radios such as the TS 6908 do not have this bypass function or to cancel tuning in progress Note the TUNE button on the tuner will not operate the Kenwood radio interface 34 O 2005 2012 MFJ Enterprises Inc MFJ 993B IntelliTuner Automatic Antenna Tuner Instruction Manual Yaesu Radio Interface MFJ 5124Y The MFJ 5124Y radio interface allows users of FC 30 compatible Yaesu transceivers to connect to the MFJ 993B IntelliTuner M Automatic Antenna Tuners With this interface power and control signals are connected between the radio and the tuner The operator can then control the tuner with a single push of the TUNE key on the front panel of the radio Supported Yaesu radios are FT 100 FT 450 FT 857 FT 897 FT 950 and any Yaesu radio that supports the Yaesu FC 30 tuner Connections for FT 100 1 A Zei 8 Before connecting the MFJ 5124Y to your radio follow the instructions in the radio s manual for installing the FC 20 automatic antenna tuner Press and hold the FUNC key for 2 second to activate the Menu mode b Rotate the SELECT
33. Yaesu radio s operating manual 1 Press the TUNE button on the radio briefly to enable the external tuner function The TUNER icon will appear in the radio s display Press and hold the TUNE button on the radio for one second to begin automatic tuning The radio will automatically transmit a low power carrier and start the tuning process The TUNER icon will blink while tuning is in progress Press the TUNE button on the radio while tuning is in progress to cancel the automatic tuning Note The FT 950 will not start automatic tuning when the SWR is greater than approximately 5 1 indicated by both TUNER and HI SWR icons blinking once when the TUNE button on the radio is pressed and held for one second When tuning is completed the radio will stop transmitting and you will be ready for operation on this frequency Note the TUNE button on the tuner will not operate the MFJ 5124Y Yaesu radio interface 38 O 2005 2012 MFJ Enterprises Inc MFJ 993B IntelliTuner Automatic Antenna Tuner Instruction Manual Yaesu Radio Interface MFJ 5124Y2 The MFJ 5124Y2 radio interface allows users of Yaesu FT 847 and transceivers with compatible CAT system to connect to the MFJ 993B IntelliTuner Automatic Antenna Tuner With this interface control signals are connected between the radio and the tuner With this cable the operator can control the tuner and radio with a single push of the TUNE butto
34. ansceiver enter the Menu mode by pressing the MENU key momentarily b Rotate the Main Tuning Dial knob until you see menu item 145 tGEn TUN PWR on the transceiver s display c Rotate the SUB VFO B knob to select 20 watts for best SWR accuracy For the FT 2000D we recommend that this be set to 50 watts if the user normally operates at 100 watts output power when power is turned down to 100 watts the TUNE power will reduce to 25 watts If the operator normally has his FT 2000D set for the full 200 watts then this should be set to 20 watts d Press and hold in the MENU key for two seconds to save the new setting and exit to normal operation If you press the MENU key momentarily the new setting will not be saved 2 Insert the 3 5 mm stereo phone plug into the MFJ 993B RADIO INTERFACE jack 3 Connect the RCA plug on the MFJ 5124Y4 to the TX REQ jack on the rear panel of the transceiver 4 Connect a 12V 1000 mA DC source to the MFJ 993B 5 Push the POWER button on the MFJ 993B to the in position The radio may be powered on either before or after the tuner is powered on 2005 2012 MFJ Enterprises Inc 41 MFJ 993B IntelliTuner Automatic Antenna Tuner Instruction Manual Operation for FT 2000 series of radios The transceiver is controlled by the MFJ 993B To operate 1 Press the TUNE button on the MFJ 993B for 4 2 seconds to initiate the tuning process The radio will automatically transmit a low powe
35. ar segment appears on the lower right corner of the Memory indicator 24 another dot appears on top of this bar segment when the meter range is high and no dot when the meter range is low 25 e Auto Semi A small S appears to indicate semi automatic mode nothing appears to indicate automatic mode 26 e StickyTune When StickyTune is ON a bar appears on top of the Auto Semi indicator 27 00 Gei Oe Appears when Antenna 1 is selected Appears when Antenna 2 is selected Appears when IntelliTune is ON Appears when Memory Bank A is ON Appears when Memory Bank B is ON Appears when Memory Bank C is ON Appears when Memory Bank D is ON Appears when in 150 Watt Power Level Appears when LC Limit is OFF Appears when Auto Range is ON Appears when in Auto High Range Appears when in Semi Auto mode Appears when StickyTune is ON Figure 14 Tuner Indicators 16 O 2005 2012 MFJ Enterprises Inc MFJ 993B IntelliTuner Automatic Antenna Tuner Instruction Manual Setup Mode Menus The setup mode menus allow you to customize how the MFJ 993B tuner operates There are 12 setup mode menus arranged in a wrap around structure To access these setup menus press and hold the MODE button for two seconds The setup menu that will display is the one that was last used When finished press the MODE button for two seconds to go back to the main mode for normal operation The tuner goes into protective bypass mod
36. automatic tuning The radio will automatically transmit a low power carrier and start the tuning process Press the B TUN key again to cancel tuning in progress When tuning is completed the radio will stop transmitting and you will be ready for operation on this frequency Note the TUNE button on the tuner will not operate the MFJ 5124Y Yaesu radio interface 2005 2012 MFJ Enterprises Inc 35 MFJ 993B IntelliTuner Automatic Antenna Tuner Instruction Manual Connections for FT 450 1 ON Ee O 8 Before connecting the MFJ 5124Y to your radio follow the instructions in the radio s manual for installing the FC 30 40 automatic antenna tuner a Press and hold the F button for one second to enter the Menu mode The MENU icon will appear in the display b Rotate the DSP SEL knob to select Menu item TUNER TUNER ATAS c Press the DSP SEL knob to enable this selected Menu item d Rotate the DSP SEL knob to change the setting to EXT ATU e Press and hold the F button for one second to save the new setting and exit to normal operation Turn the radio off Insert the 3 5 mm stereo phone plug into the tuner s RADIO INTERFACE jack Insert the 2 1 x 5 5 mm coaxial power plug into the tuner s POWER jack Insert the 8 pin modular plug into the MFJ 5124 s TO RADIO jack Important Make sure the DC power to the radio has been turned off The radio does not fuse the DC power to the tuner and da
37. c unless a compatible radio interface cable is connected between the MFJ 993B and your transceiver This ensures that the MFJ 993B does not attempt tuning during high power operation and is particularly important when an HF amplifier is in line Note Ifan amplifier is in line it should always be bypassed prior to tuning 7 Key your transmitter to output a carrier of 2 20 watts CW FM or AM Note Due to detector non linearities at low power levels best SWR tuning accuracy occurs at 10 20 watts 8 Press and hold the TUNE button for one second to start the automatic tuning process When completed check to ensure an SWR of 1 5 or less has been achieved before increasing RF power Note If you have a tuning solution on one band or antenna and you then change bands or antenna and attempt to transmit a tuning signal the previous tuning solution may be sufficiently severe such that no power is detected by the MFJ 993B the MFJ 993B will tell you to increase power When this occurs simply bypass the MFJ 993B and then initiate a tune 2005 2012 MFJ Enterprises Inc 3 9 MFJ 993B IntelliTuner Automatic Antenna Tuner Instruction Manual Note If the tuner was unable to achieve the target SWR the Reflected Power needle will bounce three times when tuning completes Note You are ready to transmit with full power During the automatic tuning process the tuner will make some nois
38. dios The transceiver is controlled by the MFJ 993B To operate 1 42 Press the TUNE button on the MFJ 993B for 4 2 seconds to initiate the tuning process The radio will automatically transmit a low power carrier and start the tuning process When tuning is completed the radio will stop transmitting and you will be ready for operation on this frequency O 2005 2012 MFJ Enterprises Inc MFJ 993B IntelliTuner Automatic Antenna Tuner Instruction Manual In Case of Difficulty If the LCD screen is blank check adjustment of the contrast control If no audio is present with audio enabled adjust the volume control If the tuner acts erratic reset the tuner to factory defaults by pressing both the TUNE and L DN buttons while turning the power on If the tuner fails to tune please double check all connections and follow the tuning procedures again Be sure you are using enough inductance through manual adjustment and minimum capacitance If the tuner arcs at the rated power levels please double check all connections and follow the tuning procedures again Ensure you are not exceeding the tuner s rated power handling capability Be sure you are using the least amount of inductance and the greatest capacitance possible that still allows matching the load on the operating frequency Note If the tuner arcs when operating on the 160 meter band it may be necessary to reduce transmitter output power If you are still unsucce
39. e These are the relays switching at a very high rate and this is normal Do not be alarmed Note When the tuner power is OFF the tuner is bypassed and RF from the transmitter or amplifier goes directly to the antenna with no matching The MFJ 993B always powers up in bypass mode to ensure maximum receiver sensitivity if you are listening on a different frequency than where tuning last occurred When tuning starts the MFJ 993B reverts to previously stored matching values or finds a new match if no previous information is in memory You may bypass the tuner at anytime when the tuner power is ON by pressing C DN and L DN simultaneously or pressing TUNE quickly When the MFJ 993B is bypassed the reflected meter needle bounces to the 20 watt mark while the switches are pressed Antenna 1 Antenna 2 Transmitter es VYFJ 993B 50 ohm Coax RF Ground 12 VDC Figure 1 Typical Installation Block Diagram Front Panel SWR ANT C UP L UP AUTO POWER 1 i l 2 echt TUNE oud s Ka MODEL MF IntelliTuner MFJ 993B AUTOMATIC ANTENNA TUNER 300 150 Watts SWR 1 12 15 2 3 WW PWR_0 25 50 75 100 300 Leypass Dual Power Level Figure 2 MFJ 993B Front Panel SWR Wattmeter The cross needle meter measures forward power reflected power and SWR It operates whenever the MFJ 993B is powered on The default full
40. e complex impedance of your antenna Next it calculates the components it needs and instantly snaps them in Finally it fine tunes to minimize SWR and you re ready to operate typically in a fraction of a second If the antenna impedance is not within the tuner s measurement range MFJ s AdaptiveSearch algorithm goes into action Frequency is measured and relevant components values are determined Only those values are searched for fast tuning If it still cannot find a match the search is performed again using a different search pattern The target tuned SWR can be set to 1 0 to 2 0 The minimum power to tune is approximately two watts with maximum SWR tuning accuracy occurring at tuning power levels of 10 20 watts Manual tuning is also available for touching up the tuning if desired Like all MFJ s IntelliTuners the MFJ 993B supports 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 certain Yaesu radios with a CAT system and Yaesu FH 1 and FH 2 remote controls Optional interface cables MFJ 5124A for Alinco MFJ 51241 for Icom MFJ 5124K for Kenwood and MFJ 5124Y Y2 Y3 Y4 for Yaesu are available from MFJ Enterprises Inc The optional MFJ 993RC Remote Control provides most tuner controls allowing convenient remote locating of the tuner itself 2005 2012 MFJ Enterprises Inc 1 MFJ 993B IntelliTuner Automatic Antenna Tun
41. e in the setup mode and restores the matching network after exiting the setup mode If no button is pressed for more than eight seconds the tuner automatically exits the setup mode restores the matching network and returns to the main mode To access the LC Limit setup menu from any setup menu press and hold the MODE button and within two seconds press both C UP and L UP buttons This difficulty is built in so the LC Limit is not accidentally disabled Notice the LC Limit is not saved into non volatile memory and will revert back to default ON when power is turned off The following setup modes are stored separately for antennas 1 and 2 Power Level Target SWR Auto Tune SWR Meter Range Peak Hold Memory and IntelliTune Within each setup menu e Press the MODE button briefly to cycle through the setup menus press and hold the MODE button for two seconds to exit the setup mode and go back to the main mode e Press the C UP or L UP button to increase or turn on the setting for the current setup menu e Press the C DN or L DN button to decrease or turn off the setting for the current setup menu Power Level Menu Allows you to set the maximum power level the MFJ 993B can handle to 300 watts or 150 watts SSB CW Power level of 300 watts can match antennas with impedances of 6 to 1600 ohms power level of 150 watts can match a wider impedance range of 6 to 3200 ohms Default is 300 watts Shortcut Press TUNE C UP
42. e provided the following terms of this warranty are satisfied 1 10 11 The purchaser must retain the dated proof of purchase bill of sale canceled check credit card or money order receipt etc describing the product to establish the validity of the warranty claim and submit the original or machine reproduction of such proof of purchase to MFJ Enterprises Inc at the time of warranty service MFJ Enterprises Inc shall have the discretion to deny warranty without dated proof of purchase Any evidence of alteration erasure or forgery shall be cause to void any and all warranty terms immediately MFJ Enterprises Inc agrees to repair or replace at MFJ s option without charge to the original owner any defective product under warrantee provided the product is returned postage prepaid to MFJ Enterprises Inc with a personal check cashiers check or money order for 12 00 covering postage and handling This warranty is NOT void for owners who attempt to repair defective units Technical consultation is available by calling the Service Department at 662 323 0549 or the MFJ Factory at 662 323 5869 This warranty does not apply to kits sold by or manufactured by MFJ Enterprises Inc Wired and tested PC board products are covered by this warranty provided only the wired and tested PC board product is returned Wired and tested PC boards installed in the owner s cabinet or connected to switches jacks or cables etc sent to MFJ Enter
43. eased TUNE L DN 30 Watts Meter Range Auto Range bees L UP 1 beep 2 beeps TUNE C DN Memory Bank A Memory Bank B Memory Bank C Memory Bank D TUNE L UP Auto Tune SWR 0 5 Auto Tune SWR 1 0 Auto Tune SWR 1 5 1 beep 2 beeps 3 beeps TUNE 2 seconds Sticky Tune Off Not Used Sticky Tune On 2 beeps 1 beep Both Needles Mid Scale Full Scale Delete Confirmation D Gees 1 SCH TUNE C DN Not Used Not Used Memory Overwrite L DN 1 beep Needles Intersect at SWR 1 5 Needles Intersect at SWR 2 0 TUNE C UP Target SWR 1 5 Target SWR 2 0 1 beep 2 beeps Table 2 Meter Needle Stationary Codes If not enough power is applied for tuning less than 2 watts the display will flash three times and QRO dah dah di dah di dah dit dah dah dah will be sent on CW Increasing the input power above two watts ends this message When input power is too high the tuner enters a self protection mode The tuner will not allow any of its relays to change This feature is to prevent damage to your tuner If too much power is applied when tuning the tuner will cease the tuning routine flash GEES F three times and send QRP dah dah di dah di dah dit di dah dah dit on CW This occurs when the forward power exceeds 75 watts and the SWR is greater than 3 0 or when the forward power exceeds 125 watts regardless of the SWR If more than 300 watts or more than15
44. edline impedance an odd quarter wavelength feedline converts the low antenna impedance to a very high impedance at the tuner A similar problem occurs if the antenna has an extremely high impedance and the transmission line is a multiple of a half wavelength The half wavelength line repeats the very high antenna impedance at the tuner Incorrect feedline and antenna lengths can make an otherwise perfect antenna system very difficult or impossible to tune One example where this problem occurs is on 80 meters when an odd quarter wave 60 to 70 feet open wire line is used to feed a half wave 100 to 140 feet dipole The odd quarter wave line transforms the dipole s low impedance to over three thousand ohms at the tuner This is because the mismatched feedline is an odd multiple of 1 4 wavelength long The line inverts or teeter totters the antenna impedance A problem also occurs on 40 meters with this same antenna example The feedline is now a multiple of a half wave 60 to 70 feet and connects to a full wave high impedance antenna 100 to 140 feet The half wave line repeats the high antenna impedance at the tuner The antenna system looks like several thousand ohms at the tuner on 40 meters This places enormous strain on the balun and the insulation in the tuner since voltages can reach several thousand volts This can cause component arcing and heating The following suggestions will reduce the difficulty in matching an antenna with a t
45. elliTuner includes a highly efficient switching L network with wide matching capability 1 8 to 30 MHz coverage cross needle power meters backlight LCD display an accessory remote control port a radio interface port and heavy duty 16 amp 1000 volt relays It is rated at 300 watts to match 6 to 1600 ohms 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 the capacitance switched between the input and output side this provides a total of 131 072 L C tuning combinations The nominal tuning ranges are 0 to 24 uH and 0 to 3900 pF The MFJ 993B IntelliTuner learns and remembers When you transmit it automatically adjusts for minimum SWR and remembers the frequency and tuner settings safely stored in non volatile memory The next time you operate on that frequency or close to it and antenna the tuner settings are instantly restored and 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 InstantRecall checks its memory to see if you have operated on that frequency before If so tuning is instantaneous and you re ready to operate If not MFJ s IntelliTune algorithm based on MFJ s famous SWR Analyzer technology kicks in It measures th
46. er Instruction Manual The MFJ 993B tuner 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 Automatically matches antennas with impedances of 6 to 1600 ohms or 6 to 3200 ohms Handles 300 watts match 6 to 1600 ohms or 150 watts match 6 to 3200 ohms Tunes in less than 15 seconds usually less than 5 seconds Over 20 000 non volatile memories for tuner settings Four memory banks per antenna with over 2500 memories per bank Highly efficient switching L network matching circuit 1 8 to 30 MHz continuous frequency coverage Adjustable target SWR 1 0 to 2 0 default is 1 5 Adjustable SWR threshold 0 5 to 1 5 default is 0 5 above target SWR Lighted cross needle SWR wattmeter with high low and auto range options Multifunction backlit LCD display with contrast control Numeric readings for SWR forward and reflected power Bar meters for SWR forward and reflected power with range options Audio SWR meter with volume control Built in frequency counter for remembering frequency specific matching values Two SO 239 coax fed antenna connectors Connector for random wire or single wire antennas Built in 4 1 current balun for balanced line antennas Optional remote control Optional radio interface cables for compatible radios Specifications e 0 e e e 060 060 e 06 0 P P e e e e Impedance matching range 6to 1
47. eration of the AH 3 or AH 4 described in the Icom radio s operating manual 1 Push and hold the TUNER button on the radio for one or two seconds to initiate automatic tuning process The radio will automatically switch to CW mode transmit a 10 watt carrier and start the tuning process When the tuning process is completed the radio will stop transmitting return to its previous mode and power setting 2 Push the TUNER button on the radio quickly to bypass the tuner or to cancel tuning in progress Note the TUNE button on the tuner will also key the Icom radio interface 2005 2012 MEI Enterprises Inc 33 MFJ 993B IntelliTuner Automatic Antenna Tuner Instruction Manual Kenwood Radio Interface The MFJ 5124K radio interface allows users of AT 300 compatible Kenwood transceivers to connect to the MFJ 993B IntelliTuner Automatic Antenna Tuner With this interface power and control signals are connected between the radio and the tuner The operator can then control the tuner with a single push of the AT TUNE button on the front panel of the radio Supported Kenwood radios are TS 50S TS 450S TS 480HX TS 570S TS 590S TS 690S TS 850S TS 870S TS 2000 and any Kenwood radio that supports the Kenwood AT 300 tuner Note The TS 480HX will automatically reduce its TX power to 100 watts maximum 25 watts AM when the radio interface is used Connections 1 Insert the 3 5 mm stereo phone plug into the tuner
48. he tuner needs something to push against in order to force current into the single wire feedline If a good RF ground is not available RF will usually find its way back into the power line RFI transmitter audio circuits RF feedback or the operator RF burns Metal water pipes and ground rods provide good DC and AC safety grounds but they are almost useless for dependable RF grounding RF grounds work much better when spread out over a large area especially when they employ multiple connections directly to the equipment ground point Metal water pipes heating ducts and fences may work especially if they are connected together with multiple wires but the best RF grounds are radial systems or multi wire counterpoises Radials and counterpoises provide large low resistance surfaces for RF energy RF and lightning travel on the surface of conductors Braided or woven conductors have high surface resistance to lightning and RF Ground leads for RF and lightning should have wide smooth surfaces Avoid the use of woven or braided conductors in RF and lightning grounds unless the lead needs to be flexible Antenna System Hints Coaxial Cable Selection The proper selection of coax cable will minimize antenna system losses especially in the presence of high SWR And the coax cable selection is particularly important in high power amateur installations RG 58 U or RG 8X is fine for interconnecting the transceiver output and amplifier inp
49. hone plug into the MFJ 993B RADIO INTERFACE jack Connect the 3 5 mm mono plug on the MFJ 5124Y3 to the REMOTE jack on the rear panel of the transceiver Connect a 12V 1000 mA DC source to the MFJ 993B Push the POWER button on the MFJ 993B to the in position The radio may be powered on either before or after the tuner is powered on Operation for FT 1000MP series of radios The transceiver is controlled by the MFJ 993B To operate 1 Press the TUNE button on the MFJ 993B for 4 2 seconds to initiate the tuning process The radio will automatically transmit a low power carrier and start the tuning process When tuning is completed the radio will stop transmitting and you will be ready for operation on this frequency Connections for FTpx 9000 series of radios 1 40 Before connecting the MFJ 5124Y3 to your radio set the maximum TUNE power of the radio as follows On your transceiver enter the Menu mode by pressing the MNU key momentarily Rotate the Main Tuning Dial knob until you see menu item 157 EXT AMP TUNING PWR on the transceiver s display Rotate the CLAR VFO B knob to select 50 watts for best SWR accuracy The TUNE power varies with the output power level control setting so ensure that the TUNE power is somewhere between 20 50 watts O 2005 2012 MFJ Enterprises Inc MFJ 993B IntelliTuner Automatic Antenna Tuner Instruction Manual d Press and hold in the MNU key for two seconds to save the
50. integrated circuits until the tuner displays a frequency of 03 tz and the meter needles settle at the O watt marks Notice the meter movement is St for easier calibration Nominal tolerance of the frequency counter is 1 kHz Turn off the power to the tuner and the transmitter Secure the cover back onto the tuner O 2005 2012 MFJ Enterprises Inc 31 MFJ 993B IntelliTuner Automatic Antenna Tuner Instruction Manual Alinco Radio Interface The MFJ 5124A radio interface allows users of EDX 2 compatible Alinco transceivers to connect to the MFJ 993B IntelliTuner M Automatic Antenna Tuner With this interface power and control signals are connected between the radio and the tuner The operator can then control the tuner with a single push of the TUNE button on the front panel of the radio Supported Alinco radios are DX 70 DX 77 DX 701 DX 801 and any Alinco radio that supports the Alinco EDX 2 tuner Connections 1 Insert the 3 5 mm stereo phone plug into the tuner s RADIO INTERFACE jack 2 Insert the 2 1 x 5 5 mm coaxial power plug into the tuner s POWER jack 3 Important Make sure the DC power to the radio has been turned off The radio does not fuse the DC power to the tuner and damage to the radio can occur if the interface s power connection comes in contact with ground 4 Connect the 5 pin molex connector to the mating 5 pin molex connector marked as ACC on the back of the Alinco radio 5 Push the POW
51. ios nasa 40 Connections for FTpx 9000 series Of radios a 40 Operation for FTDx 9000 series Of radios asss 41 Yaesu Radio Interface MFJ S5124 V4 occ cccccsccesecesecesecseeceseeeeseeeseecseeeseecsaecsaecaeceseceseeseeeeeetenseeenes 41 Connections for FT 2000 series Of radios nono nooo nnconnnns 41 Operation for FT 2000 series Of rodios asas 42 Connections for FTpx 5000 series Of radios sssi 42 Operation for FTDx 5000 series Of radios asas 42 Im Case ODIA CUY ee A uta EE 43 Technical Assistance 43 Listo ACC dr A A A as 43 Circuit Block Dia gram c nka n A A Ae 44 FIGURES Figure 1 Typical Installation Block Diagram nono nono nono noon nono nrnnnrnnnnnnos 4 Figure 2 MFJ 993B Front Panel EE 4 Figure 3 Mode Button Flow Chart and Button Action a nono noconnconnnns 7 Figure 4 MFJ 993B Back Panel 8 Figure 5 Alinco Interface Gable nono nooo ccoo nono nn co naco na rn a 9 Figure 6 Icom Interface Cable uuu a uu aaa asqanakuqa sana EENE 9 Figure 7 Yaesu Interface Cable FT 1000MP 9000 sees 10 Figure 8 Yaesu Interface Cable FT 2000 5000 sees 10 Figure 9 SWR Wattmeter A ge 12 Figure 10 Power Bar Meter High Range 14 Figure 11 Power Bar Meter Low Range 14 enge SWR Bar Meter ts 14 Figure 13 Main Mode Menus Display n nn 15 Figure 1
52. ith at least two watts of power regardless of the SWR This works in both automatic and semi automatic modes To toggle the StickyTune mode on and off press and hold the TUNE button for two seconds The reflected power needle goes to 60 watt mark when on and to 5 watt mark when off one beep indicates on and two beeps indicate off Power On Reset POR StickyTune mode is selected via the POR Sticky Tune setup menu default is ON after a power cycle Note StickyTune is disabled after tuning Note StickyTune after power cycle means that the MFJ 993B will do a full tune after a power cycle on the first frequency you transmit on only No other frequency or memory solutions will be affected So you can fully re tune on any frequency by simply cycling power Note Ifan amplifier is in line it should always be bypassed prior to tuning VOL Control A trimpot control that adjusts the volume level of the audio SWR meter Use a small flat 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 meter bounces three times to indicate the model number 993 When the power is off the tuner is bypassed straight through from TRANSMITTER to ANTENNA and WIRE When turning on the power the tuner powers up bypassed but will revert to the last stored matching values or begin tuning on application of RF power when the TUNE but
53. jack is an open collector output and it is safe to use with the IC 7000 Connections 1 Insert the 3 5 mm stereo phone plug into the tuner s RADIO INTERFACE jack 2 Insert the 2 1 x 5 5 mm coaxial power plug into the tuner s POWER jack 3 Important Make sure the DC power to the radio has been turned off The radio does not fuse the DC power to the tuner and damage to the radio can occur if the interface s power connection comes in contact with ground 4 Connect the 4 pin molex connector to the mating 4 pin molex connector marked as TUNER on the back of the Icom radio 5 Push the POWER button on the tuner to the in position and then power on the radio 6 Some Icom radios such as the IC 706 automatically check to see if an external antenna tuner is connected during power on For other Icom radios such as the IC 718 the Tuner Type menu in the radio menu system must be enabled Refer to your radio s operating manual for accessing the menu system and preparing the AH 4 antenna tuner operation Use IC 718 as an example a Push PWR for 1 second to turn power off b While pushing and holding SET push PWR to turn power on c Push UP or DN one or more times to select TUNER d Rotate the Main Dial to select 4 for AH 4 antenna tuner e Push PWR for one second to turn power off f Push PWR to turn power on again Operation The operation of the MFJ 5124 radio interface is similar to the op
54. mage to the radio can occur if the interface s power connection comes in contact with ground Connect the 8 pin mini DIN connector to the mating 8 pin mini DIN connector marked as TUNER on the back of the radio Push the POWER button on the tuner to the in position and then power on the radio Operation for FT 450 The operation of the MFJ 5124Y radio interface is similar to the operation of the FC 30 40 described in the Yaesu radio s operating manual 1 Press the TUNE button on the radio briefly to enable the external tuner function The TUNER icon will appear in the radio s display If the radio frequency is out of the amateur band the TUNER icon will not appear Press and hold the TUNE button on the radio for one second to begin automatic tuning The radio will automatically transmit a low power carrier and start the tuning process The TUNER icon will blink while tuning is in progress Press and hold the TUNE button on the radio for one second while tuning is in progress to cancel the automatic tuning When tuning is completed the radio will stop transmitting and you will be ready for operation on this frequency Note the TUNE button on the tuner will not operate the MFJ 5124Y Yaesu radio interface 36 O 2005 2012 MFJ Enterprises Inc MFJ 993B IntelliTuner Automatic Antenna Tuner Instruction Manual Connections for FT 857 or FT 897 1 7 Before connecting the MFJ 5124Y to your
55. match of 1 5 is found In all cases manual tuning gives the user control of the tuner 1f desired and the L Network menu provides a picture of the matching network configuration Manual tuning should always be done at low power and is accomplished by using the C UP C DN L UP and L DN buttons Since it is not known if more or less capacitance or inductance is needed manual tuning must be by trial and error As an example to manually tune capacitance press C UP one time and the reflected power will indicate 1f C UP was the right direction If it was press C UP again and observe reflected power If not press C DN twice once to return to the original setting of C and once for one click past it Manual tuning of inductance is similarly accomplished using L UP and L DN Since the capacitance and inductance are interdependent some back and forth between the two may be needed just as in a conventional tuner with knobs Pressing C UP and C DN simultaneously moves the capacitance back and forth from one side of the inductance to the other The L Network menu displays the capacitance on the left to indicate that the capacitance is on the antenna side corresponding with the rear panel configuration of connectors the capacitance value moves to the right side of the display when the capacitance is on the transmitter side of the inductance A general rule of thumb is that loads with impedance higher than 50 ohms call for
56. mportant Make sure the DC power to the radio has been turned off The radio does not fuse the DC power to the tuner and damage to the radio can occur if the interface s power connection comes in contact with ground Connect the 8 pin mini DIN connector to the mating 8 pin mini DIN connector marked as CAT LINEAR on the back of the radio Push the POWER button on the tuner to the in position and then power on the radio Operation for FT 857 or FT 897 The operation of the MFJ 5124Y radio interface is similar to the operation of the FC 30 described in the Yaesu radio s operating manual 1 Press the FUNC or F key then rotate the SELECT or MEM VFO CH knob to recall Multi Function Row k TUNE DOWN UP Press the A TUNE key on the radio to turn the external tuner function on the TUNE or TUNR icon will appear in the radio s display Press and hold the A TUNE key on the radio to begin automatic tuning The radio will automatically transmit a low power carrier and start the tuning process Press the A TUNE key again to cancel tuning in progress When tuning is completed the radio will stop transmitting and you will be ready for operation on this frequency Note the TUNE button on the tuner will not operate the MFJ 5124Y Yaesu radio interface 2005 2012 MFJ Enterprises Inc 37 MFJ 993B IntelliTuner Automatic Antenna Tuner Instruction Manual Connections for FT 950 1 SI ch A A
57. n on the front panel of the MFJ 993B Connections for FT 847 1 Eh OV SO ae A p t Before connecting the MFJ 5124 to your radio setup the radio s CAT a Press the MENU key momentarily to activate the Menu mode b Rotate the SUB TUNE knob to recall Menu 37 CAT RATE and then rotate the MEM VFO CH knob to change the setting to 4800 c Press the MENU key momentarily to save the new setting and exit to normal operation Turn the radio off Insert the 3 5 mm stereo phone plug into the tuner s RADIO INTERFACE jack Insert the 2 1 x 5 5 mm coaxial power plug into the tuner s POWER jack Insert the 8 pin modular plug into the MFJ 5124 s TO RADIO jack Important Make sure the DC power to the radio has been turned off Connect the DB 9 connector to the mating DB 9 connector marked as CAT on the back of the radio The FT 847 does not have a DC power connection on its CAT port Connect a 12 volts DC 1000 mA power supply such as the MFJ 1316 to the MFJ 5124 s POWER jack This will supply power to the MFJ 5124 and the MFJ 993B Operation for FT 847 The operation of the MFJ 5124Y2 CAT interface is simple 1 2 Turn on the radio and then turn on the tuner Press and hold the TUNE button on the tuner for 0 5 to 2 seconds to start the automatic tuning The radio will switch to AM mode transmit a carrier and start the tuning process When the tuning process is completed the radio will stop transmi
58. na 2 with the ANT button that you want to delete Turn off power to the tuner and then press and hold b th th TUNE and C DN buttons while turning the power back on A confirmation message will display Press the YES C UP button to delete the antenna memory will display and both meter needles go to full scale or press the NO L UP button to cancel will display and both meter needles go to zero scale Release the button to resume normal operation Remember that the selected antenna memory will be lost Total Reset To erase both antenna memories and reset to factory defaults press and hold down the TUNE C DN and L DN buttons while turning the power on A confirmation message FH Ei will display Press the YES C UP button to delete both antenna memories and reset tor defaults will display and both meter needles go to full scale or press the NO L UP button to cancel will display and both meter needles go to zero scale Release the button to resume normal operation Remember that both antenna memories will be lost and tuner settings will return to default Self Test A self test routine will check the functions of the MFJ 993B This routine checks the display the meter the front panel buttons the internal memory and the audio circuitry During the self test you may stop the test by turning off the unit however this should NOT be done during the memory test or the memory could be corrupted The
59. ns The forward needle should bounce once for each press and the reflected needle should move up a division for each press 8 The unit then tests its non volatile memory Notice this step will reset the unit to its factory default settings 9 Ifthe unit is okay a repetitive message FFE will be displayed and sent as Morse code di dah dah dit di dah di di dit di di dit and both meter needles will go to full scale If there is a problem a failure message will be displayed and sent also the forward needle will bounce and the reflected needle mark indicates the failure 10 Once you have confirmed that the audio is okay turn the unit off Failure Reflected Message Needle watts Indicates 1 ANT button is shorted or improperly connected 2 MODE button is shorted or improperly connected 3 C UP button is shorted or improperly connected 4 5 C DN button is shorted or improperly connected L UP button is shorted or improperly connected 7 5 L DN button is shorted or improperly connected 10 AUTO button is shorted or improperly connected 15 TUNE button is shorted or improperly connected Radio interface cable is connected but radio power is off 20 Non volatile memory circuitry is improperly connected 30 Microprocessor wakeup circuitry problem 40 Power down circuitry problem Table 4 Failure Messages 28 2005 2012 MFJ Enterprises Inc
60. ol This cable plugs into the REMOTE jack on the rear panel of the Yaesu radios and keys the Yaesu radios in the CW tune mode whenever the MFJ 993B s TUNE button is pushed MFJ recommends that the Yaesu CW tune setting be set to 10 watts Yaesu MP menu selection 4 3 during the tune process when an amplifier is not used For best accuracy when an amplifier is used MFJ recommends that the Yaesu CW tune setting be set to 50 watts for 100 watt transceivers and 75 watts for 200 watt MKV transceivers during the tune process If a FH 1 or FH 2 keypad is also used both the FH 1 FH 2 and the radio control cable may be plugged in parallel using a 3 5 mm headphone splitter mono or stereo is fine Refer to Yaesu Radio Interface MFJ 5124Y3 on pages 40 to 41 for connections and operation 1N4148 22 1K Tip KEY connects to the Tip of 3 5 mm Stereo Phone Plug Pee D D VV with a diode and a 22 1k ohm 1 resistor in series KEY GND 4 2V 0 13V Sleeve GND connects to the Sleeve of 3 5 mm Stereo Phone Plug Figure 7 Yaesu Interface Cable FT 1000MP 9000 series The MFJ 5124Y4 interface provides control but not power between a Yaesu radio and the MFJ automatic tuner Supported Yaesu radios are FT 2000 series FTbx 5000 series and any Yaesu radio with compatible TX REQ jack This cable plugs into the TX REQ RCA jack on the rear panel of these Yaesu radios and keys the Yaesu radios in the CW tune mode whenever the MFJ 993B s TUNE button
61. ontact with the components inside the tuner while transmitting will result in painful RF burns Locate the tuner so that the rear terminals are not accessible during operation The single wire and balanced line connection may have high voltage while transmitting Disconnect all antennas from the tuner during lightning storms Always tune with low power 2 20 watts and any in line amplifier must be bypassed Apply maximum power only after tuning up Never exceed tuner specifications 1 Place the tuner in a convenient location at the operating position When using a random wire or balanced line the feed through insulators may have high RF voltages These voltages can cause serious RF burns if the terminals are touched when transmitting Be sure to locate the tuner so these terminals cannot accidentally be contacted during operation 2 Connect the tuner to the transceiver or amplifier with 50 ohm coaxial cable such as RG 8 U See Figure on page 4 3 Connect the antenna s to the tuner as follows e Coaxial feedlines RG 8 U or better to the SO 239 connectors labeled ANTENNA 1 and or ANTENNA 2 2005 2012 MEI Enterprises Inc 11 MFJ 993B IntelliTuner Automatic Antenna Tuner Instruction Manual e Random wire to the WIRE binding post on the back of the tuner and remove the jumper wire Note the back panel warning Do not connect WIRE and ANTENNA 1 at same time When a single wire antenna is connected it becomes ANTENN
62. ot calculate the load impedance it proceeds to yet another method of calculation If for any reason this function can be turned off Refer to Figures 13 and 14 for the on screen IntelliTune indicator Default is ON 2005 2012 MFJ Enterprises Inc 19 MFJ 993B IntelliTuner Automatic Antenna Tuner Instruction Manual SWR Beep Menu Turns the audio SWR meter on and off The audio meter is a series of beeps where one beep indicates SWR of 1 5 or less two beeps indicate SWR of 1 6 to 2 0 three beeps indicate SWR of 2 1 to 2 5 and four beeps indicate SWR of 2 6 to 3 0 For SWR above 3 0 SWR di di dit di dah dah di dah dit will be sent on CW This functions independent of the acknowledgement beep setting Default is OFF Shortcut Press both L UP and L DN buttons simultaneously to toggle SWR Beep on and off Beep Menu Acknowledgement beep sounds each time a parameter is changed to acknowledge it This also controls the CW notification of QRO QRP and QRT This function can be turned OFF for silent operation and this is independent of the SWR beep setting Default is ON Refresh Menu When the refresh function is ON the display is updated while tuning is in progress Default is OFF Note Refresh slows tuning progress as it takes time to update the display Power On Reset POR Sticky Tune Menu Determines the state of StickyTune when power is cycled Default is OFF If ON then StickyTune will be
63. ous main menus and to enter or exit the setup menus e CUP and CDN Buttons Used to manually increase or decrease the capacitance of the L network matching 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 s components This limit can be removed in the LC Limit setup menu but is not recommended Pressing C UP and C DN simultaneously toggles the capacitor between the input and output sides of the L network Forward needle bounces to the 30 watts when the capacitor is on the transmitter side Reflected needle bounces to the 5 watts when the capacitor is on the antenna side e L UP and L DN Buttons Used to manually increase or decrease the inductance of the L network matching circuit The inductance range is 0 to 24 86 uH microhenries The upper limit of inductance dependent on frequency is used to limit the maximum voltage and current across the tuner 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 and off See SWR Beep Menu on page 20 Note Pressing C DN and L DN simultaneously places the tuner in bypass mode The reflected meter needle momentarily bounces to the 20 watt mark to indicate this RF from the transmitter goes directly to the antenna with no matching
64. prises Inc will be returned at the owner s expense unrepaired Under no circumstances is MFJ Enterprises Inc liable for consequential damages to person or property by the use of any MFJ products Out of Warranty Service MFJ Enterprises Inc will repair any out of warranty product provided the unit is shipped prepaid All repaired units will be shipped COD to the owner Repair charges will be added to the COD fee unless other arrangements are made This warranty is given in lieu of any other warranty expressed or implied MFJ Enterprises Inc reserves the right to make changes or improvements in design or manufacture without incurring any obligation to install such changes upon any of the products previously manufactured All MFJ products to be serviced in warranty or out of warranty should be addressed to MFJ Enterprises Inc 300 Industrial Park Road Starkville Mississippi 39759 USA and must be accompanied by a letter describing the problem in detail along with a copy of your dated proof of purchase This warranty gives you specific rights and you may also have other rights which vary from state to state MFJ ENTERPRISES INC MFJ 993B Manual 300 Industrial Park Road Version 2B Starkville MS 39759 Printed In U S A 03 2012 MFJ
65. r carrier and start the tuning process When tuning is completed the radio will stop transmitting and you will be ready for operation on this frequency Connections for FTpx 5000 series of radios 1 Before connecting the MFJ 5124Y4 to your radio set the maximum TUNE power of the radio as follows On your transceiver enter the Menu mode by pressing the MENU button momentarily Rotate the VFO A SELECT knob until you see menu item 173 TGEN TUN PWR on the transceiver s display Rotate the VFO B SELECT knob to select 20 watts for best SWR accuracy For the FTpx 5000 we recommend that this be set to 50 watts if the user normally operates at 100 watts output power when power is turned down to 100 watts the TUNE power will reduce to 25 watts If the operator normally has his FTpx 5000 set for the full 200 watts then this should be set to 20 watts Press and hold in the MENU button for two seconds to save the new setting and exit to normal operation If you press the MENU button momentarily the new setting will not be saved Insert the 3 5 mm stereo phone plug into the MFJ 993B RADIO INTERFACE jack Connect the RCA plug on the MFJ 5124Y4 to the TX REQ jack on the rear panel of the transceiver Connect a 12V 1000 mA DC source to the MFJ 993B Push the POWER button on the MFJ 993B to the in position The radio may be powered on either before or after the tuner is powered on Operation for FTpx 5000 series of ra
66. r is bypassed straight through from TRANSMITTER to ANTENNA 1 and WIRE When power is turned on the tuner powers up bypassed but will revert to the last stored matching values or begin tuning on application of RF power when the TUNE button is pressed or if Automatic or Sticky Tune is enabled If the tuner is not working properly even on initial power on try resetting to the factory defaults Factory Defaults The unit is shipped with the following default settings for both antennas e Main Menu Digital Wattmeter Setup Menu Target SWR e Inductance 0 uH e Capacitance 0 pF on transmitter side e Power Level 300 watts T e Target SWR 1 5 T Auto Tune SWR 0 5 above target SWR T 26 2005 2012 MFJ Enterprises Inc MFJ 993B IntelliTuner Automatic Antenna Tuner Instruction Manual e Meter Range 300 watts high range T e Peak Hold ON T e Memory Banks 1A and 2A on T e IntelliTune On T e SWR Beep Off e Beep On e Refresh Off e POR Sticky Tune On T These settings are stored separately for antennas 1 and 2 Note Resetting to factory defaults does not erase the antenna memories To reset the tuner to these defaults 1 Turn off the power to the tuner 2 Press and hold both the Hai and L DN b tons while turning the power on 3 Release the buttons when appears on the display and both meter needles read full scale 4 Resume normal operation Delete Antenna Memory To delete an antenna memory select Antenna 1 or Anten
67. radio follow the instructions in the radio s manual for installing the FC 30 automatic antenna tuner For the following use the FUNC key and the SELECT knob on the FT 857 or use the F key and the MEM VFO CH knob on the FT 897 a Press and hold the FUNC or F key for one second to activate the Menu mode b Rotate the SELECT or MEM VFO CH knob to recall Menu Mode 001 EXT MENU and then rotate the Main Dial to change the setting to ON to enable extended Menu Mode c Rotate the SELECT or MEM VFO CH knob to recall Menu Mode 020 CAT LIN TUN and then rotate the Main Dial to change the setting to TUNER d Press and hold the FUNC or F key for one second to save the new setting and exit to normal operation e Turn the radio off then on again Do not connect the MFJ 5124Y before changing the Menu Mode 020 CAT LIN TUN f Press and hold the FUNC or F key for one second to activate the Menu mode g Rotate the SELECT or MEM VFO CH knob to recall Menu Mode 085 TUNER ATAS and then rotate the Main Dial to change the setting to TUNER h Press and hold the FUNC or F key for one second to save the new settings and exit to normal operation Turn the radio off Insert the 3 5 mm stereo phone plug into the tuner s RADIO INTERFACE jack Insert the 2 1 x 5 5 mm coaxial power plug into the tuner s POWER jack Insert the 8 pin modular plug into the MFJ 5124 s TO RADIO jack I
68. radio will disable its internal tuner if it has one and use the MFJ 993B external tuner The Radio Interface works with radios that are compatible with Alinco EDX 2 Icom AH 3 and AH 4 Kenwood AT 300 and Yaesu FC 30 FH 1 and FH 2 When connected to a compatible radio simply press the TUNER or AT button on the radio for FH 1 or FH 2 compatible Yaesu press the TUNE button on the tuner to start the automatic tuning process The radio will automatically switch to CW mode transmit a low power typically 10 watts carrier and start the tuning process Once the automatic tuning is completed the radio will return to its previous mode and power setting 8 O 2005 2012 MFJ Enterprises Inc MFJ 993B IntelliTuner Automatic Antenna Tuner Instruction Manual The MFJ 5124A interface cable provides power and control signals between an Alinco radio and the MFJ automatic tuner Supported Alinco radios are DX 70 DX 77 DX 701 DX 801 and any Alinco radio that supports the Alinco EDX 2 tuner Press the radio s TUNE button to start the tuning process for DX 70 press FUNC then TUNE Refer to Alinco Radio Interface on page 32 for connections and operation O Pin 1 Ground connects to the Sleeves of both 3 5 mm Stereo Phone Plug and Power Plug Pin 2 13 8V connects to the Center Pin of Power Plug Pin 3 Key connects to the Tip of 3 5 mm Stereo Phone Plug Pin 4 is not connected Pin 5 Start connects to the
69. s RADIO INTERFACE jack Insert the 2 1 x 5 5 mm coaxial power plug into the tuner s POWER jack Insert the 8 pin modular plug into the MFJ 5124 s TO RADIO jack EH E oh Important Make sure the DC power to the radio has been turned off The radio does not fuse the DC power to the tuner and damage to the radio can occur if the interface s power connection comes in contact with ground 5 Connect the 6 pin molex connector to the mating 6 pin molex connector marked as AT or ACC on the back of the Kenwood radio 6 Push the POWER button on the tuner to the in position and then power on the radio 7 Some Kenwood radios automatically check to see if an external antenna tuner is connected during power on For other Kenwood radios such as the TS 450S and the TS 690S the External Antenna Tuner menu in the radio menu system must be enabled Refer to your radio s operating manual for accessing the menu system and preparing the AT 300 external antenna tuner operation Use TS 450S and TS 690S as an example a Press and hold the ENT key while turning the power on b Rotate the M CH VFO CH control to select menu number 01 on the display c Press the UP or DOWN key to change the setting to ON d Press the CLR key to return to normal operation Operation The operation of the MFJ 5124K radio interface is similar to the operation of the AT 300 described in the Kenwood radio s operating manual 1 Press and hold the A
70. scale readings are 300 watts forward and 60 watts reflected power The meter can be set to a low power range of 30 watts forward and 6 watts reflected or AUTO metering where the meter range is determined by the transmit power 2005 2012 MFJ Enterprises Inc MFJ 993B IntelliTuner Automatic Antenna Tuner Instruction Manual The SWR is measured at the point where the two needles cross See SWR Wattmeter on page 12 for more detailed information e LCD Display A 2 line by 16 character alphanumeric display It displays the tuner s various menus and status The display contrast can be adjusted by the LCD control on the front panel Below the display are the SWR and power bar meter scales Refer to Figures 13 and 14 for descriptions of the various displayed information e LCD Contrast Control A trimpot control that adjusts the contrast of the LCD display Use a small flat blade screwdriver and turn clockwise to increase contrast e ANT Button Used to select the antenna to tune Button out selects Antenna 1 button in selects Antenna 2 The Antenna indicator on the main display indicates the selected antenna A balanced feedline or a single wire antenna is by default Antenna 1 Changing the ANT button will switch the antenna only when there is no RF power also the tuner setting for the selected antenna 1f available is instantly restored from memory when enabled e MODE Button Time sensitive and used to navigate through the vari
71. self test can be completed in approximately 30 seconds 2005 2012 MEI Enterprises Inc 27 MFJ 993B IntelliTuner Automatic Antenna Tuner Instruction Manual This test can also be used to test the optional MFJ 993RC Remote Control Make sure to press both ANT and AUTO buttons on the MFJ 993B tuner to the in position before starting the self test and press the buttons on the MFJ 993RC instead of the front panel buttons when prompted Note Performing the self test will reset the unit to its factory default settings Here is the self test procedure 1 Turn off the power to the tuner and press all buttons to the out position 2 Unplug the radio interface cable if one is connected from the tuner 3 If testing the MFJ 993RC Remote Control connect it to the Remote Port and make sure both ANT and AUTO buttons on the tuner are locked in 4 Set volume to a comfortable listening level 5 Press and hold only the L UP button while turning the power on 6 dE b Ge E di layi ga 1gh nd fi mwa ion nu ber such as ri a This is the test of the EH A the same time the forward needle of TE meter GE goes up slowly to full scale and then drops to zero followed by the reflected needle going up slowly to full scale and then drops to zero This tests the meter Release the L UP button before the message completes To skip this copyright message press C DN button 7 You will be prompted to press each of the front panel butto
72. single wire and balanced line connection may have high voltage while transmitting Disconnect all antennas from the tuner during lightning storms Always tune with low power 2 watts minimum 10 20 watts recommended and with any in line amplifier bypassed Apply maximum power only after tuning up Never exceed tuner specifications 1 Connect the MFJ 993B to a 12 15 VDC voltage source capable of supplying at least 1 amp 2 Connect your transmitter or amplifier output 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 or connect your random wire to the WIRE binding post or connect your balanced line antenna to the BALANCED 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 The Power On Reset default is also for StickyTune to be ON Place the ANT button in the out position to select antenna 1 Note StickyTune after power cycle means that the MFJ 993B will do a full tune after a power cycle on the first frequency you transmit on only No other frequency or memory solutions will be affected So you can fully re tune on any frequency by simply cycling power 6 Lock the AUTO button in to select semi automatic mode Note The AUTO button should always be IN semi automati
73. ssful but the tuner does adjust and operate when used with a dummy load or another antenna please read Grounding Hints on page 23 and Antenna System Hints on page 24 Technical Assistance If you have any problem with this unit first check the appropriate section of this manual If the manual does not reference your problem or your problem is not solved by reading the manual you may call MFJ Technical Service at 662 323 0549 or the MFJ Factory at 662 323 5869 You will be best helped if you have your unit manual and all information on your station handy so you can answer any questions the technicians may ask You can also send questions by mail to MFJ Enterprises Inc 300 Industrial Park Road Starkville MS 39759 by facsimile FAX to 662 323 6551 or by email to techinfo mfjenterprises com Send a complete description of your problem an explanation of exactly how you are using your unit and a complete description of your station Also include the firmware version number of your unit List of Accessories MFJ 993RC Remote control MFJ 1316 12 VDC 1 5 amp power supply MFJ 5124A Interface cable for compatible Alinco radios MFJ 51241 Interface cable for compatible Icom radios MFJ 5124K Interface cable for compatible Kenwood radios MFJ 5124Y Interface cable for Yaesu FT 100 FT 450 FT 857 FT 897 and FT 950 MFJ 5124Y2 Interface cable for Yaesu FT 847 and compatible radios MFJ 5124Y3 Interface cable for Yaesu FT 1000
74. tenna and Antenna 2 settings for balanced line or single wire antenna are stored as Antenna 1 This provides memory for up to eight different antennas Refer to Figures 13 and 14 for the on screen Memory indicator Defaults are memory banks 1A and 2A ON Shortcut Press both TUNE and C DN buttons simultaneously to turn on the antenna memory and to cycle the memory banks A B C and D Refer to Table 2 for meter code To clear the memory for an antenna all four banks select the antenna with the ANT button and turn off the power to the tuner Then press and hold both TUNE and C DN buttons while turning on the power AL message will appear Total Reset erases both antenna memories and returns all tuner settings to their factory default states To achieve thi er off press and hold TUNE L DN and C DN buttons while turning on the Y message will appear Note Pressing TUNE C DN and L DN buttons simultaneously overwrites the tuner memory with the current tuner setting settings with SWR greater than 3 0 will not be stored IntelliTune Menu Turns the JntelliTune tuning algorithm on and off When the tuner cannot find an appropriate setting in its memory it begins its calculation function It measures the complex impedance of the antenna load at the transmitting frequency then it calculates the L C components needed for a match Then it fine tunes the component values If for any reason the tuner cann
75. the capacitance on the antenna side loads with impedance lower than 50 ohms call for the capacitance on the transmitter side Pressing C DN and L DN simultaneously or pressing TUNE quickly places the tuner in bypass mode i e zero inductance and zero capacitance RF from the transmitter goes directly to the antenna with no matching The reflected needle bounces to 20 watt mark to indicate the bypass mode Also the decimal point in the SWR reading is replaced with a comma Pressing TUNE C DN and L DN simultaneously must be pressed within 80ms of each other overwrites the tuner memory with the current tuner setting Settings with SWR greater than 3 0 will not be stored Both forward and reflected needles go to full scale to indicate memory overwrite Meter Codes and Audible Beeps In addition to displaying power and SWR the meter also indicates tuner status The meter needles bounce or rise to one point and stay to provide information In this mode the meters do not indicate power levels For example when you press C DN and L DN simultaneously to place the tuner in bypass mode the reflected needle bounces to the 20 watts mark until you release the buttons The following tables show the meter needle stationary and bounce codes 2005 2012 MEI Enterprises Inc 21 MFJ 993B IntelliTuner Automatic Antenna Tuner Instruction Manual Meter Needle Stationary Codes Meter needles stay at the indicated mark until buttons are rel
76. ton is pressed or if Automatic or Sticky Tune is enabled The target SWR appears on the main screen 2005 2012 MFJ Enterprises Inc MFJ 993B IntelliTuner Automatic Antenna Tuner MODE BUTTON FLOW CHART MAIN MODES Digital Wattmeter For 2 sec Power Bar Meter SWR Instruction Manual SETUP MODES Bar Meter For 2 sec L Network or Idle for 8 sec BUTTON ACTION while in the main modes POWER in to turn power on out to turn power off ANT into select antenna 2 out to select antenna 1 MODE to switch main modes and setup modes to increase capacitance to decrease capacitance to increase inductance to decrease inductance in to select semi automatic mode out to select automatic mode L DN to toggle the SWR Beep on and off L UP to increase both capacitance and inductance L DN to bypass the antenna tuner C UP to toggle the Target SWR between 1 5 and 2 0
77. tting and return to its previous mode Press the TUNE button on the tuner briefly will place the tuner into bypass mode Note the TUNE key on the radio will not operate the Yaesu radio s CAT interface O 2005 2012 MFJ Enterprises Inc 39 MFJ 993B IntelliTuner Automatic Antenna Tuner Instruction Manual Yaesu Radio Interface MFJ 5124Y3 The MFJ 5124Y3 radio interface allows users of Yaesu FT 1000MP series and FTpx 9000 series transceivers to connect to the MFJ 993B IntelliTuner M Automatic Antenna Tuner With this interface control signals are connected between the radio and the tuner With this cable the operator can control the tuner and radio with a single push of the TUNE button on the front panel of the MFJ 993B Connections for FT 1000MP series of radios 1 Before connecting the MFJ 5124Y3 to your radio set the maximum TUNE power of the radio as follows a d On your transceiver enter the Menu mode by pressing and holding the FAST key and then pressing ENT Rotate the UEM VFO CH knob until you see menu 4 3 on the transceiver s CH display Rotate the MAIN VFO knob to select 50 for 100 watt radios FT 1000MP MP Field or 75 for the FT 1000MP MKV when an amplifier will be used This gives the best SWR accuracy which may be important for solid state amplifiers When an amplifier is not used the setting can be set at 10 for all transceivers Press ENT to exit the Menu mode Insert the 3 5 mm stereo p
78. uner e Never center feed a half wave multi band antenna with a high impedance feedline that is close to an odd multiple of a quarter wave long e Never center feed a full wave antenna with a feedline close to a multiple of a half wave long e If this tuner will not tune a multi band antenna add or subtract 1 8 wave of feedline for the band that won t tune and try again e Never try to load a G5RV or center fed dipole on a band below the half wave design frequency If you want to operate an 80 meter antenna on 160 meters feed either or both conductors as a longwire against the station ground To avoid problems matching or feeding any dipole antenna with high impedance open wire lines keep the lines around these lengths The worst possible line lengths are shown in brackets 160 meters dipole 35 60 170 195 or 210 235 feet Avoid 130 260 ft 80 meters dipole 34 40 90 102 or 160 172 feet Avoid 66 135 190 ft 40 meters dipole 42 52 73 83 112 123 or 145 155 feet Avoid 32 64 96 128 ft Some slight trimming or adding of feedline may be necessary to accommodate the higher bands WARNING To avoid problems a dipole antenna should be a full half wave on the lowest band On 160 meters an 80 or 40 meters antenna fed the normal way will be extremely reactive with only a few ohms of feedpoint resistance Trying to load an 80 meters half wave dipole or shorter antenna on 160 meters can be a disaster for both your signal and
79. uning tool or small flat blade screwdriver Turn off the power to the tuner and the transmitter Remove the cover from the tuner 12 screws with a Phillips screwdriver Press and nol both a C UP st 1 DN buttons while turning the power on A message F will display and both meter needles will bounce Use a small flat blade EE SE adjust the FWD trimpot R75 located behind the display to set the forward needle to the 100 watt mark Press the TUNE button to ae the reflected needle 6 A message Hi i will display Adjust the REF trimpot R76 located behind the display to set the WC needle to the 20 watt mark 7 Press the TUNE button to end calibration 8 Turn off the tuner power and secure the cover back onto the tuner AAA q SWR Bridge Calibration To calibrate the SWR Bridge you will need a transmitter capable of 100 watts output a precise calibrated wattmeter a 50 ohm dummy load three 50 ohm SO 239 coax cables a Phillips screwdriver and a tuning tool or small flat blade screwdriver WARNING Do not touch anything inside the tuner during operation Serious painful RF burns can result WARNING Never operate the MFJ 993B with its cover removed dangerous voltages and currents can be present during operation Never exceed tuner specifications 1 Turn off the power to the tuner and the transmitter 30 2005 2012 MFJ Enterprises Inc 10 11 12 Turn off the power to the tuner
80. ures 13 and 14 for the on screen Range indicator O 2005 2012 MFJ Enterprises Inc 13 MFJ 993B IntelliTuner Automatic Antenna Tuner Instruction Manual PWR 0 25 50 75 100 300 Figure 10 Power Bar Meter High Range PWR 0 25 50 75 100 300 O 5 Figure 11 Power Bar Meter Low Range SWR Bar Meter Menu Shows the frequency SWR forward power and SWR bar meter A SWR scale is printed just below the display on the front panel The 13 block 36 segment SWR bar meter indicates SWR of 1 0 1 1 1 2 1 3 1 4 1 5 1 6 1 7 1 8 2 0 2 1 2 5 2 6 3 0 3 1 5 0 5 1 15 0 and 15 1 to infinity The numeric reading of forward power appears at the end of the bar meter There is also an audio SWR indicator see SWR Beep Menu section on page 20 Figure 12 SWR Bar Meter L Network Menu Shows the configuration of the L network matching circuit SWR and forward power The antenna symbol on the upper left corner indicates the antenna side of the L network The capacitance value is displayed to the left when it is on the antenna side and to the right when on the transmitter side Inductance value is shown in microhenries uH and capacitance value in picofarads pF The numeric reading of forward power appears at the lower right corner of the display See Manual Tuning on page 21 14 O 2005 2012 MFJ Enterprises Inc MFJ 993B IntelliTuner Automatic Antenna Tuner 0000 O 0000 io
81. ut However these cable types are unacceptable at the amplifier output and tuner output due to power handling capability and loss especially loss in the presence of high SWR As an example RG 58 U has a maximum power handling capability of 570 watts and loss of 2 4 dB 100 feet at 28 MHz under matched conditions while the maximum power for RG 8X is just 360 watts with a loss of 1 9 dB 100 feet at 28 MHz under matched conditions When the SWR rises the power handling capability decreases by 1 VSWR and loss also increases Therefore MFJ recommends that RG 8 U RG 213 LMR 400 or other high quality coax cables be used between the MFJ 993B output and the antenna Refer to The Radio Amateurs Handbook and The ARRL Antenna Book for more information Location For the best performance an end fed longwire wire antenna should be at least one quarter wavelength long at the operating frequency Horizontal dipole antennas should be at least a half wavelength long and located as high and clear as possible While good RF grounds help the signal in almost any transmitting installation it is extremely important to have good RF grounds with long wire or other Marconi style antennas 24 2005 2012 MFJ Enterprises Inc MFJ 993B IntelliTuner Automatic Antenna Tuner Instruction Manual Matching Problems Most matching problems occur when the antenna system presents an extremely high impedance to the tuner When the antenna impedance is much lower than the fe
82. your transceiver This will ensure that the MFJ 993B does not attempt tuning during high power operation This is particularly important when a HF amplifier is also being used Note If an amplifier is in line it should always be bypassed prior to tuning Meter Range Menu Allows you to select the meter scale range In the 30 watts low range forward full scale is 30 watts and the reflected full scale is 6 watts divide the meter reading by 10 In the 300 watts high range the forward full scale is 300 watts and the reflected full scale is 60 watts Auto range automatically sets the meter scales according to the input RF power to the tuner Forward power greater than 30 watts or reflected power greater than six watts automatically sets the meter to the high power range Forward power less than 25 watts and reflected power less than four watts automatically set the meter to the low power range Refer to Figures 13 and 14 for the on screen Meter Range indicators Default is the 300 watt range Shortcut Press both TUNE and L DN buttons simultaneously to cycle the meter range among 30 watts 300 watts and auto range Refer to Table 2 for meter code Peak Hold Menu When the peak hold function is ON the highest activated segment of the forward bar meter remains visible for about one second so that you can more easily read it When OFF the meter functions normally Default is ON Memory Menu Turns the antenna memory

MFJ-993B Manual 2B

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