Yaesu FT-991 Operating Manual

Also see for FT-991: Manual Manual Operating manual Reference book Instruction manual

Page 60FT-991 O PERA T ING M ANUALTransMiTTer ConvenienCe feaTuresSplit-Frequency operAtionA 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 isvery advanced and easy to use.1. Rotate the Main Tuning Dial knob to set the desiredRX frequency.2. Press the A/B button, then rotate the Main TuningDial knob to set the desired split TX frequency.3. Press the A/B button, then press the SPLIT button.The VFO-B frequency will appear in the TFT dis-play and the LED indicators will look like as below:VFO-A RX Indicator: “ON” (LED glows Green)VFO-A TX Indicator: “OFF” (LED Off)VFO-B RX Indicator: “OFF” (LED Off)VFO-B TX Indicator: “ON” (LED glows Red)SPLIT ButtonTXW ButtonA/B ButtonDuring Split operation, the VFO-A register will be usedfor reception, while the VFO-B register will be used fortransmission. If you press the SPLIT button once more,Split operation will be cancelled.A dvice : During Split operation, pressing the A/ B button willreverse the contents of the VFO-A and VFO-B. Pressthe A/B button once more to return to the originalfrequency alignment. During Split operation you may listen to the TX fre-quency temporarily while pressing the TXW buttonlocated on the bottom left of the Main Tuning Dialknob.While pressing the TXW button during split opera-tions, the frequency on the transmission side can bechanged. It is possible to set different operating modes (for ex-ample, LSB and USB) on the two VFOs used duringSplit operation. During Split operation it is also possible to set VFO-A and VFO-B to different Amateur bands if you usea multi band antenna.Quick Split OperationThe Quick Split feature allows you to set a one-touchoffset of +5 kHz to be applied to your radio’s VFO-B(transmit) frequency, compared to the VFO-A frequency.1. Start with regular transceiver operation on the VFO-A.VFO-A RX Indicator: “ON” (LED glows Green)VFO-A TX Indicator: “ON” (LED glows Red)VFO-B RX Indicator: “OFF” (LED Off)VFO-B TX Indicator: “OFF” (LED Off)2. Press and hold in the SPLIT button for one secondto engage the Quick Split feature, and apply a fre-quency 5 kHz above the VFO-A frequency to theVFO-B frequency register.The VFO configuration will then be:VFO-A RX Indicator: “ON” (LED glows Green)VFO-A TX Indicator: “OFF” (LED Off)VFO-B RX Indicator: “OFF” (LED Off)VFO-B TX Indicator: “ON” (LED glows Red)3. Press and hold in the SPLIT switch for one secondto increment the Sub (VFO-B) frequency another +5kHz.quick pointS: The operating mode applied to the VFO-B registerwill be the same as that in use on the VFO-A regis-ter. The offset of VFO-B from VFO-A is programmedvia the Menu and is set to +5 kHz at the factory.However, other offsets may be selected using the fol-lowing procedure:1. Press the MENU(SETUP) button to engage theMenu mode.2. Rotate the MULTI knob to select Menu item “034QUICK SPLIT FREQ”.3. Touch [SELECT] on the LCD, then rotate theMULT knob to select the desired offset. The avail-able selections are –20kHz ~ +20kHz (factory de-fault: +5 kHz).4. Touch [ENTER] button to save the new setting.5. Press the MENU(SETUP) button or touch [BACK]on the LCD to exit to normal operation.