Yaesu FT-991 Operating Manual
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Yaesu FT-991 Operating Manual

Yaesu hf/vhf/uhf all mode transceiver
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Download this manual See also: Instruction Manual, Operating Manual
HF/VHF/UHF A
M
T
ll
ode
rAnsceiVer
FT-991
o
M
perATing
AnUAl
YAESU MUSEN CO., LTD.
Tennozu Parkside Building
2-5-8 Higashi-Shinagawa, Shinagawa-ku, Tokyo 140-0002 Japan
YAESU USA
6125 Phyllis Drive, Cypress, CA 90630, U.S.A.
YAESU UK
Unit 12, Sun Valley Business Park, Winnall Close
Winchester, Hampshire, SO23 0LB, U.K.

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  • Page 1 HF/VHF/UHF A rAnsceiVer FT-991 perATing AnUAl YAESU MUSEN CO., LTD. Tennozu Parkside Building 2-5-8 Higashi-Shinagawa, Shinagawa-ku, Tokyo 140-0002 Japan YAESU USA 6125 Phyllis Drive, Cypress, CA 90630, U.S.A. YAESU UK Unit 12, Sun Valley Business Park, Winnall Close Winchester, Hampshire, SO23 0LB, U.K.

  • Page 3: Table Of Contents

    able of onTenTs WIDTH ( IF DSP Bandwidth ) Tuning ( SSB/CW/ Table of Contents ............1 RTTY/DATA Modes ) ..........40 Accessories & Options ..........3 NARROW ( NAR ) One-Touch IF Filter Supplied Accessories ..........3 Available Options ............. 4 Selection ..............
  • Page 4 able of onTenTs FM Mode Operation ..........72 Repeater Operation ..........73 Tone Squelch Operation ......... 74 Memory Operation ............ 75 Convenient Memory functions ....... 75 QMB ( Quick Memory Bank ) ......... 75 Standard Memory Operation ........76 Memory Groups ............. 80 Operation on Alaska Emergency Frequency: 5167.5 khz (U.S.

  • Page 5: Accessories & Options

    & o CCessories pTions upplied cceSSorieS Hand Microphone ( MH-31 1 pc A07890001 DC Power Cord 1 pc T9025225 Spare Fuse (25A) 1 pc Q0000074 Operating Manual 1 pc Warranty Card 1 pc F T-991 O Page 3 peraTing anual...

  • Page 6: Available Options

    & o ccessories ptions vAilAble ptiOns Ultra-High-Fidelity Desktop Microphone MD-200 MD-100 Desktop Microphone Lightweight Stereo Headphone YH-77STA FH-2 Remote Control Keypad VL-1000/VP-1000 Linear Amplifier/AC Power Supply External Automatic Antenna Tuner FC-40 FP-1030A External Power Supply (13.8 VDC 25 A) CT-118 VL-1000 Linear Amplifier Connection Cable CT-39A Packet Interface Cable CT Cable (MDIN10P - Bare Wire 2m) Linear Amplifier Connection Cable (P/N T9207451) MD-200 YH-77STA FH-2 VL-1000/VP-1000 FC-40 Page 4 F T-991 O peraTing anual...

  • Page 7: Adjusting The Clock

    efore egin djuSting the lock Use the following procedure to adjust the clock shown at the top right of the LCD display. 1. Press and hold the MENU(SETUP) button. MENU(SETUP) button 2. Touch [TIME/DATE] on the LCD. 3. Enter the present time with the number keys on the LCD, then touch [ENT].

  • Page 8: Antenna Considerations

    Any antenna to be used with the FT-991 must be fed from the transceiver with 50 Ohm coaxial cable. Therefore, when using a “balanced” antenna such as a dipole, remember that a balun or other matching/balancing device must be used to ensure proper antenna performance.

  • Page 9: Grounding

    The FT-991 transceiver, like any other HF communications apparatus, requires an effective ground system for maxi- mum electrical safety and best communications effectiveness. A good ground system can contribute to station efficiency in a number of ways: ...

  • Page 10: Installation And Interconnections

     Do not install the FT-991 on an unstable desk or table. Do not place in a location where objects may fall onto it from above.  To minimize the possibility of interference to home entertainment devices, take all precautionary steps including separation of TV/FM antennas from Amateur transmitting antennas to the greatest extent possible, and keep trans- mitting coaxial cables separated from cables connected to home entertainment devices.

  • Page 11: Connection Of Microphone And Headphone

    nsTallaTion and nTerConneCTions onnection oF icrophone And eAdphone  DOWN  UP  +5V   MIC GND  MIC   PTT  GND  FAST F T-991 O Page 9 peraTing anual...

  • Page 12: Key, Keyer, And Computer-Driven Keying

    The FT-991 includes many features for the CW operator. These functions will be detailed in the “Operation” section later. Besides the built-in Electronic Keyer, two key jacks are provided, one on the front and one on the rear panel, for convenient connection to keying devices.

  • Page 13: Vl-1000 Linear Amplifier Interconnections

    MpliFier nterconnectionS Be sure that both the FT-991 and VL-1000 are turned off, and then follow the installation recommendations contained in the illustration.  Refer to the VL-1000 Operating Manual for details regarding amplifier operation.  Do not attempt to connect or disconnect coaxial cables when your hands are wet.

  • Page 14: Interfacing To Other Linear Amplifiers

    FT-991 is 0 to -4 Volts DC.  Amplifier systems utilizing different ALC voltages will not work correctly with the FT-991, and their ALC lines must not be connected if this is the case. Page 12 F T-991 O...

  • Page 15: Front Panel Controls & Switches

    This 8-pin jack accepts input from a microphone uti- “011 F CW KEYER” (see page ##). lizing a traditional YAESU HF transceiver pinout. You cannot use a 2-contact plug in this jack (to do so produces a constant “key down” condition).

  • Page 16: Mode Button

    & s ronT anel onTrols wiTChes F(M-LIST) Button BAND Button These keys allow one-touch selection of the desired Amateur band (1.8 ~ 50 MHz). This button is used to display function list. The fol- The keys may also be used for direct entry of a de- lowing functions can be accessed from the function sired operating frequency during VFO operation.
  • Page 17 A=B Button TUNE Button Press this button momentarily to transfer the fre- This is the on/off switch for the FT-991’s Automatic quency or memory channel data, from VFO-A to Antenna Tuner. VFO-B, overwriting any previous contents in VFO- Pressing this button momentarily places the antenna B.
  • Page 18 & s ronT anel onTrols wiTChes C.S Button V/M Button Press this button momentarily to directly recall a fa- This button toggles frequency control between VFO- vorite Menu Selection. A and the memory system. In memory mode, “MEM” To program a Menu selection to the C.S button, (Memory Channel) will be shown in the display to press the MENU(SETUP) button to enter the indicate the current selection.

  • Page 19: Rf Gain Knob

    & s ronT anel onTrols wiTChes Main Tuning Dial Knob CLAR/VFO-B Knob This large knob adjusts the operating frequency of During the VFO-A operation, this knob tunes the VFO-A. Clockwise rotation of this knob increases Clarifier offset frequency up to ±9.999 kHz. the frequency.

  • Page 20: Display Indications

    isplaY ndiCaTions LCD Display Mode Indicator This indicator appears whenever the receiver’s Displays the current operating mode. narrow IF DSP filter is engaged. VFO-A Frequency Display Shows the main band (VFO-A) frequency. This indicator appears while the optional Voice Memory Unit is recording your voice message, or Tuning Offset Indicator the Contest Keyer is recording your CW keying.

  • Page 21: Function Keys

    isplaY ndiCaTions VFO-B Frequency Display Scope Display Shows the sub band (VFO-B) frequency during Split operation. Function Keys S/PO Meter On reception, this indicates the received signal Clock strength from S-0 to S-9+60dB. Indicates the current time. On transmission, this indicates the RF Power Output, from 0 to 150 Watts.
  • Page 22 isplaY ndiCaTions LED Indicators RX Indicator Sub Band RX/TX Indicators This indicator illuminates when the squelch opens. Green (Left): This indicator illuminates when the receiver is ac- TX Indicator tive on the main band (VFO-B). This indicator illuminates during transmission. Red (Right): Memory Mode RX/TX Indicators This indicator illuminates when the transmitter is...

  • Page 23: Rear Panel

    Keypad into this gold-plated jack, direct access to ground connections, and please refer to page ## for the FT-991 CPU is provided for control functions other notes about proper grounding. such as contest memory keying, plus frequency and To prevent damage from lightning, atmo- function control.
  • Page 24 GPS/CAT Jack This 9-pin serial DB-9 jack allows external computer control of the FT-991. Connect a serial cable here and to the RS-232C COM port on your personal computer (no external interface is required).

  • Page 25: Mh-31A8J Microphone Switches

    Mh-31a8J M iCrophone wiTChes PTT Switch Press and hold the PTT (Push To Talk) switch to start transmission. DWN Button Press the DWN (Down) button to scan the frequency downward. FST Button Press the FST (Fast) button to increase the tuning rate by a factor of ten when scanning the frequency.

  • Page 26: Optional Fh-2 Switches

    fh-2 s pTional wiTChes The optional Remote Control Keypad FH-2 can be used to control the optional DVS-6 Voice Memory capability for the SSB/AM/FM modes; the contest memory keyer for the CW mode; and the text memory for the RTTY/DATA modes. Some specific capabilities of the FH-2...
  • Page 27  If using a linear amplifier, have all interconnections been successfully completed? See pages ##, ## for details.  Please rotate the AF GAIN control to the fully counter-clockwise position, to avoid a loud blast of audio when the transceiver turns on. See page ## for details. FT-991 O Page 25 peraTing...
  • Page 28 This is the is provided. point of maximum sensitivity to weak signals.  The FT-991 utilizes a triple band-stack VFO Excessive advancement of [ SQL ] will decrease selection technique, which permits storing up to the ability of the receiver to detect weak signals.

  • Page 29: Basic Operation: Receiving On Amateur Bands

     If you want to effect rapid frequency change, there are several techniques available:  Direct keyboard entry of the frequency.  Use the microphone’s UP/DWN scanning keys, if your microphone is so equipped. FT-991 O Page 27 peraTing anual...

  • Page 30: Only)

    The recently-released 60-meter band is covered, in the FT-991, by fixed memory channels. These channels are set to USB or CW, and they appear between the “last” PMS channel (“P9U”) and the first “regular” memory channel (Channel 1.

  • Page 31: Clar ( Clarifier ) Operation

    VFO-A frequency. Four small numbers on the TFT Display show the current Clarifier offset. The Clarifier controls on the FT-991 are designed to allow you to preset an offset (up to ±9.99 kHz) without actually re- tuning, and then to activate it via the Clarifier CLAR button.

  • Page 32: Lock

    RED / ORANGE / GRAY 4. Touch [ ENTER ] on the LCD, then touch [ BACK ] on the LCD or press the MENU button to save the new setting and exit to normal operation. MULTI Knob Page 30 fT-991 o peraTing anual...

  • Page 33: Band Stack Operation

    The FT-991 utilizes a triple band-stack VFO selection technique, that permits you to store up to three favorite frequen- cies and modes onto each band’s VFO register. For example, you may store one frequency each on 14 MHz CW, RTTY, and USB, then recall these VFOs by successive, momentary touches of [ 14 ] on the screen displayed by the BAND but- ton.

  • Page 34: Scope

    Five different screens are shown on the TFT display by pressing the [ SCOPE ] button. Spectrum scope display dvice  During continuous sweeping, no audio will be heard. Full screen spectrum scope display Page 32 fT-991 o peraTing anual...

  • Page 35: More Frequency Navigation Techniques

    30 kHz ~ 56 MHz, the microprocessor will ignore the attempt, and you will be returned to the previous operating frequency. If this happens, please try again, taking care not to repeat the error in the frequency entry process. FT-991 O Page 33 peraTing anual...

  • Page 36: Receiver Operation ( Front End Block Diagram )

    The FT-991 includes a wide range of special features to suppress the many types of interference that may be encoun- tered on the HF bands. However, real world interference conditions are constantly changing, so optimum setting of the controls is somewhat of an art, requiring familiarity with the types of interference and the subtle effects of some of the controls.

  • Page 37: Att ( A Ttenuator )

    IPO should be disabled and [ ATT ] on the LCD should be set to “OFF.” This situation is typical during quiet times on frequencies above 21 MHz, and when using a small or negative-gain receiving antenna on other bands. FT-991 O Page 35 peraTing...

  • Page 38: Ipo ( Intercept Point Optimization )

    If you can hear band noise with the preamplifiers disengaged, then a preamplifier is gen- erally not needed. Page 36 FT-991 O peraTing anual...

  • Page 39: If Noise Blanker ( Nb ) Operation

    The FT-991 includes an effective IF Noise Blanker, which can significantly reduce noise caused by automotive ignition systems. 1. Touch [ NB ] displayed by pressing the F(M-LIST) F(M-LIST) Button button briefly to reduce short duration pulse noise such as from switching transients, automobile igni- tions and power lines.

  • Page 40: Contour Control Operation

    By judicious use of the Contour filter, the “shoulder” of the passband response may be altered, or components may be removed from within the passband, allowing the desired signal to rise above the background noise and interference in a manner not obtainable with other filtering systems. Page 38 FT-991 O peraTing anual...

  • Page 41: If Shift Operation ( Ssb/Cw/Rtty/Pkt Modes )

    MULTI knob. The interference level is reduced by moving the filter passband so that the interference is outside of the passband. Desired Signal Desired Signal Desired Signal IF BANDWIDTH IF BANDWIDTH IF BANDWIDTH MULTI MULTI MULTI FT-991 O Page 39 peraTing anual...

  • Page 42: Rtty/Data Modes )

    (SHIFT). The Contour control may then yield additional signal-enhancement benefits on the net residual bandwidth. Even more, the IF NOTCH Filter (described later) may also be used, in conjunction with these filter systems, to significant advantage. Page 40 FT-991 O peraTing anual...

  • Page 43: Selection

    IF bandwidth with [ WIDTH ] on the LCD and the MULTI knob. The IF SHIFT is also operational.  When you touch [ NAR/WIDE ] on the LCD in the FM mode, both transmit and receive bandwidths are narrowed. FT-991 O Page 41 peraTing anual...

  • Page 44: If Notch Filter Operation

    “WIDE”. you can see the notching effect of the IF NOTCH filter as you rotate the MULTI knob to eliminate the interfering heterodyne. Desired Signal Desired Signal (Heterodyne) (Heterodyne) IF BANDWIDTH IF BANDWIDTH MULTI Page 42 FT-991 O peraTing anual...

  • Page 45: Digital Notch Filter ( Dnf ) Operation

    To disable the DNR system, just repeat the above proce- dure, touching [ DNR ] on the LCD to choose “OFF”. The “DNR” will turn off, confirming that the DNR system is not active. FT-991 O Page 43 peraTing anual...

  • Page 46: Tools For Comfortable And Effective Reception

    Thereafter, the RF Gain and Attenuator features may be employed to provide precise, delicate adjustment of the receiver gain to fully optimize performance. Page 44 FT-991 O peraTing anual...

  • Page 47: Audio Peak Filter

    NOTCH indicator on the display. 2. Touch [ AFP ] on the LCD again to disable the APF. dvice The APF may only be activated while the transceiver is in CW mode. FT-991 O Page 45 peraTing anual...

  • Page 48: Agc ( Automatic Gain Control )

    FAST. The AUTO generally do not recommend any changes to the AGC mode selections are: Menu selections until you are thoroughly familiar with the performance of the FT-991. Auto Agc S perAting election...

  • Page 49: Adjustable Receiver Audio Filter

    The FT-991 includes an adjustable receiver audio filter, that provides precise, independent control of the low; and upper audio ranges. MENU Button 1. Press the MENU button to enter the Menu mode. 2. Rotate the MULTI knob to find Menu items “040”...

  • Page 50: Ssb/Am Mode Transmission

     When transmitting in the AM mode, set a maxi- mum (carrier) power output of 25 Watts via [ PROC ] displayed by pressing the F(M-LIST) button. Page 48 FT-991 O peraTing anual...
  • Page 51  Four techniques for exercising Transmit/Receive dvice  ALC meter deflection may be caused by excessive control are provided on the FT-991. You may drive power, but also by reflected power detected choose the technique(s) that best suit your operating in the antenna system.

  • Page 52: Atu Operation

     Because the ATU of the FT-991 is located inside the station, it only adjusts the impedance presented to the trans- ceiver at the station end of your coaxial cable feedline. It does not “tune” the SWR at the antenna feed point itself.

  • Page 53: About Atu Operation

    SWR (After tuning) Greater than 3:1 The “HI-SWR” icon will light up, and the tuner settings, if achieved, will not be memorized. Please investigate the high SWR condition and resolve the problem before attempting further operation using this antenna. Page 51 FT-991 O peraTing anual...

  • Page 54: Arametric Icrophone Qualizer ( Ssb/Am/Fm Mode )

    Mode The FT-991 includes a unique Three-Band Parametric Microphone Equalizer that provides precise, independent control over the low, mid and treble ranges in your voice waveform. You may utilize one group of settings when the speech processor is off and an alternate group of settings when the speech processor is on. The speech processor feature is de- scribed in the next chapter.
  • Page 55 ( Low ) “1” ~ “10” Q ( Bandwidth ) “130 P-PRMTRC EQ1 BWTH” ( Mid ) “1” ~ “10” “133 P-PRMTRC EQ2 BWTH” ( High ) “1” ~ “10” “136 P-PRMTRC EQ3 BWTH” Parametric Gain Page 53 FT-991 O peraTing anual...

  • Page 56: Using The Speech Processor ( Ssb Mode )

    The FT-991 Speech Processor is designed to increase “talk power” by increasing the average power output (via a so- phisticated compression technique) and adjusting the audio quality to the menu settings (“128 P-PRMTRC EQ1 FREQ”, “131 P-PRMTRC EQ2 FREQ”, “134 P-PRMTRC EQ3 FREQ”). The result is improved intelligibility when conditions are difficult.

  • Page 57: Adjusting The Ssb Transmitted Bandwidth (Ssb Mode)

    QSOs. on fidelity. With [ MONI ] displayed by pressing the F(M- LIST) button, you will be able to hear the difference in sound quality as you make changes. Page 55 FT-991 O peraTing anual...

  • Page 58: Voice Memory

    20 seconds. Voice Memory Operation from the FH-2 Remote Control Keypad You may also utilize the Voice Memory capability of the FT-991 from the optional FH-2 Remote Control Keypad, which plugs into the rear panel’s REM/ALC jack. 7. Press the FH-2 [ MEM ] key to terminate the message...

  • Page 59: Transmitter Convenience Features

    A “PLAY” icon will appear in the display and the message will be transmitted. dvice You may adjust the transmit (audio) level of the record- ing via Menu item “010 TX OUT LEVEL”. Page 57 FT-991 O peraTing anual...

  • Page 60: Vox (Ssb/Am/Fm Modes: Automatic Tx/Rx Switching Using Voice Control)

    6) Press the MENU(SETUP) button or touch modes (SSB/AM/FM) or on AFSK-based Data [ BACK ] on the LCD to exit to normal operation. modes. Use Menu item “142 VOX SELECT” (the se- lections are “MIC” and “DATA”). Page 58 FT-991 O peraTing anual...

  • Page 61: Monitor ( Ssb/Am/Fm Modes )

     Because the Monitor feature samples the transmit- ter IF signal, it can be very useful for checking the adjustment of the Speech Processor or Parametric Equalizer on SSB, and for checking the general sig- nal quality on AM and FM. Page 59 FT-991 O peraTing anual...

  • Page 62: Split-Frequency Operation

    A powerful capability of the FT-991 is its flexibility in Split Frequency operation using the VFO-A and VFO-B fre- quency registers. This makes the FT-991 especially useful for high-level DX-peditions. The Split operation capability is very advanced and easy to use.

  • Page 63: Operation

    Cw M peraTion The powerful CW operating capabilities of the FT-991 permit operation using an electronic keyer paddle, a “straight key”, or a computer-based keying device. etup For trAight trAight ey eMulAtion perAtion Before starting, connect your key line(s) to the front panel KEY jack. Be sure [ BK-IN ] displayed by pressing the F(M-...

  • Page 64: Using The Built-In Electronic Keyer

    (or a string of dots and dashes) will be transmitted. When you release the keyer paddle con- tacts, transmission will cease, and reception will be restored after a brief delay. The delay time is user- programmable, per the discussion on page ##. Page 62 FT-991 O peraTing anual...
  • Page 65 Full Break-in (QSK) Operation As shipped from the factory, the FT-991 TX/RX system for CW is configured for “Semi-break-in” operation. However, this setup may be changed to full break-in (QSK) operation using Menu item “057 CW BK-IN”. With full break-in QSK, the TX/RX switching is quick enough to hear incoming signals in the spaces between the dots and dashes of your transmission.
  • Page 66 The configuration of the Electronic Keyer may be customized independently for the front panel KEY jack of the FT-991. This permits utilization of Automatic Character Spacing (ACS), if desired. This permits the use of an electronic keyer via the front jack and a straight key or computer-driven keying line via the rear panel jack.

  • Page 67: Cw Spotting ( Zero-Beating )

    700 Hz offset, the “zero beat” fre- quency of that CW carrier would be 14.100.70 MHz; the latter frequency is what the FT-991 displays, by default. However, you can change the display to be identical to what you would see on SSB by using Menu item “060 CW FREQ DISPLAY”...

  • Page 68: Cw Delay Time Setting

    5. When your adjustments are complete, touch [ EN- TER ] on the LCD to save the new setting. 6. Press the MENU(SETUP) button or touch [ BACK ] on the LCD to exit to normal operation. Page 66 FT-991 O peraTing anual...

  • Page 69: Remote Control Keypad)

    You may also utilize the CW message capability of the FT-991 from the optional FH-2 Remote Control Keypad, which plugs into the rear panel REM/ALC jack. Message Memory Five memory channels capable of retaining 50 characters each are provided (using the PARIS standard for characters and word length).
  • Page 70 “Text Memory technique” on a particular memory register (the Menu Mode Setting is set to “TEXT”). Page 68 FT-991 O peraTing anual...

  • Page 71: Text Memory

    The following texts are programmed to the MEM- ORY 4 and MEMORY 5 in factory default. MEMORY 4: DE FT-991 K} MEMORY 5: R 5NN K} 3. Touch [ SELECT ] on the LCD, then rotate the MULTI Knob MULTI knob to set the selected CW Memory Regis- ter to “TEXT”.
  • Page 72 “#” character desig- nates the slot where the Contest Number will appear. dvice You may also use the Main Tuning Dial knob and the knobs to program the message characters. MULTI Page 70 FT-991 O peraTing anual...

  • Page 73: Contest Memory Keyer

    Menu item “057 CW BK-IN”. 2. Press an FH-2 [ 1 ] ~ [ 5 ] key. Repetitive trans- mission of the Beacon message will begin. Page 71 FT-991 O peraTing anual...

  • Page 74: Basic Operation

     FM is only used in the 28 MHz, 50 MHz, 144 MHz, and 430 MHz Amateur bands covered by the FT- 991. Please do not use FM on any other bands. Page 72 FT-991 O peraTing anual...

  • Page 75: Repeater Operation

    M peraTion epeAter perAtion The FT-991 may be utilized on 29 MHz, 50 MHz, 144 MHz, and 430 MHz repeaters. 1. Rotate the Main Tuning Dial knob to the output fre- MENU(SETUP) Button F(M-LIST) Button quency (downlink) from the repeater.

  • Page 76: Tone Squelch Operation

    5. A “d” notation on the “1 Hz” frequency digit in the display will indicate that the Tone Decoder is engaged. A “t” notation on the “1 Hz” frequency digit while transmitting will indicate that the Tone Squelch is engaged. Page 74 FT-991 O peraTing anual...

  • Page 77: Memory Operation

    FunctionS The FT-991 contains ninety-nine regular memories, labeled “01” through “99”, nine special programmed limit mem- ory pairs, labeled “P-1L/P-1U” through “P-9L/P-9U”, and five QMB (Quick Memory Bank) memories, labeled “C-1” through “C-5”. Each stores various settings, in addition to the VFO-A frequency and mode (See below). By default, the 99 regular memories are contained in one group;...

  • Page 78: Standard Memory Operation

    The Standard Memory of the FT-991 allows storage and recall of up to 99 memories, each storing frequency, mode, and a wide variety of status information, detailed previously. Memories may be grouped into as many as six Memory Groups, and additionally you get nine pairs of band-limit (PMS) memories along with five QMB (Quick Memory Bank) memories.

  • Page 79: Labeling Memories

    A M button for one second (until the double  beep). Conversely, if you wish to write the contents of the current memory into the VFO-A register, press the V/M button. FT-991 O Page 77 peraTing anual...

  • Page 80: Erasing Memory Channel Data

    3. Touch [ ERASE ] on the LCD. dvice  The FT-991 can not erase the memory channels “01” (and “501” through “510”: U.S. version).  If you make a mistake and wish to restore the memo- MULTI Knob ry’s contents, just repeat steps (1) through (3) above.

  • Page 81: Memory Tune Operation

    “Mem- ory Tune” mode so closely resembles the VFO mode. Be sure that you have the FT-991 operating in a control mode compatible with your software’s requirements. Use the VFO mode if you’re not sure.

  • Page 82: Memory Groups

    5. Rotate the MULTI knob to select the desired Memo- ry Channel within the Selected Memory Group. dvice If no channels have been assigned to a particular Memo- ry Group, you will not have access to that Group. Page 80 FT-991 O peraTing anual...

  • Page 83: Operation On Alaska Emergency Frequency: 5167.5 Khz (U.s. Version Only)

    The FT-991 includes the capability for transmission and reception on 5167.5 kHz under such emergency conditions via the Menu system. To activate this feature: 1.

  • Page 84: Vfo And Memory Scanning

    “037 MIC SCAN RESUME”. The default “TIME” (5 sec) setting will cause the scanner to resume scan- ning after five seconds; you may change it, however, to resume only after the carrier has dropped out. Page 82 FT-991 O peraTing anual...

  • Page 85: Memory Scan

    If you have no interest in scanning, and wish to prohibit the microphone UP/DWN buttons from initiating scan- ning, you may disable scanning control from the mi- crophone using Menu item “036 MIC SCAN” (set it to “DISABLE”). FT-991 O Page 83 peraTing anual...

  • Page 86: Pms (Programmable Memory Scanning)

    9. If you press the microphone PTT switch during scanning, the scanner will halt at once. Pressing the PTT switch during scanning will not cause transmis- sion. Page 84 FT-991 O peraTing anual...

  • Page 87: Rtty ( Radio Teletype ) Operation

    See page ## for details on the connections and settings to use the optional USB Interface Unit “SCU-17”. dvice You can adjust RTTY data output level using Menu item “099 RTTY OUT LEVEL”. FT-991 O Page 85 peraTing anual...

  • Page 88: Data (Psk) Operation

    “147 DATA VOX DELAY”. You can also set data input VOX gain using Menu item “146 DATA VOX DATA OUT LEVEL”. GAIN”. To LINE IN/MIC IN, LINE OUT/MIC OUT, COM port, etc. Interface device commercially available Page 86 FT-991 O peraTing anual...

  • Page 89: Menu Mode

    The Menu system of the FT-991 provides extensive customization capability, so you can set up your transceiver just the way you want to operate it. The Menu items are grouped by general utilization category, and are numbered from “001 AGC” to “149 E/D PSK”.
  • Page 90 047 REAR PTT SELECT DAKY/RTS/DTR DAKY 048 REAR PORT SELECT DATA/USB DATA 049 AM DATA GAIN 0 ～ 100 MODE-CW 050 CW LCUT FREQ OFF/100Hz ～ 1000Hz(50Hz/step) 250Hz MODE-CW 051 CW LCUT SLOPE 6dB/oct / 18dB/oct 18dB/oct Page 88 FT-991 O peraTing anual...
  • Page 91 1275/2125 (Hz) 2125Hz MODE-SSB 102 SSB LCUT FREQ OFF/100Hz ～ 1000Hz (50Hz/step) 100Hz MODE-SSB 103 SSB LCUT SLOPE 6dB/oct / 18dB/oct 6dB/oct MODE-SSB 104 SSB HCUT FREQ 700Hz ～ 4000Hz (50Hz/step) / OFF 3000Hz FT-991 O Page 89 peraTing anual...
  • Page 92 146 DATA VOX GAIN 0 ～ 100 TX GNRL 147 DATA VOX DELAY 30 ～ 3000 (msec) 100msec TX GNRL 148 ANTI DVOX GAIN 0 ～ 100 TX GNRL 149 EMERGENCY FREQ TX DISABLE/ENABLE DISABLE Page 90 FT-991 O peraTing anual...
  • Page 93 Bandwidth: 3 kHz (LSB/USB), 500 Hz (CW), 6 kHz (AM), 16 kHz (FM) Audio Response (SSB): Not more than –6 dB from 300 to 2700 Hz Microphone Impedance: 600 Ohms (200 to 10 kOhms) FT-991 O Page 91 peraTing anual...

  • Page 94: Specifications

    4 to 16 Ohms (8 Ohms: nominal) Conducted Radiation: Less than 4000 uuW Specifications are subject to change, in the interest of technical improvement, without notice or obligation, and are guaranteed only within the amateur bands. Page 92 FT-991 O peraTing anual...
  • Page 95  Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.  Consult the dealer or an experienced radio/TV technician for help. 1. Changes or modifications to this device not expressly approved by YAESU MUSEN could void the user’s authorization to operate this device.
  • Page 96 Copyright 2014 YAESU MUSEN CO., LTD. All rights reserved No portion of this manual may be reproduced without the permission of YAESU MUSEN CO., LTD. Printed in Japan...

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