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===erase memory channel======memory channels===#Press MCK/W*'''78 general purpose memory channels'''#select channel to delete with MEM/VFO CH knob*20 "Smart Search" memory channels (FM only)#Press REV*10 full duplex satellite memory channels#Press MCK/W*4 home memory channels*1 quick memory bank channel*24 band stacking registers===erase memory channel===#Press MCK/W#select channel to delete with MEM/VFO CH knob#Press REV#Press MCK/W===vfo frequency range scan===You can also do a "programmed" scan. Set Memory Channel L to the lower limit you want to scan and Memory Channel H to the upper limit. Press the PMS button and "LU" will show in the memory channel number position. If you press Scan now, the rig will scan between those limits. Note that the firmware in the rig will round off your L and H values to the next lower 100 kHz. This means that the smallest increment you can scan is 100 kHz.#press ENT and enter the lower frequency limit followed by ENT#Press MCK/W#Turn the MEM/VFO CH dial until "L" is displayed for channel#Long Press MCK/W#press ENT and enter the upper frequency limit followed by ENT#Press MCK/W#Turn the MEM/VFO CH dial until "U" is displayed for channel#Long Press MCK/W#Press the PMS button and "LU" will be displayed for channel#Press SCANTo exit the scan press SCAN again, and press PMSNote that you will now have channels L U in the normal channel sequence. You can delete them or set them to skip. However, if you set them to skip you cannot put the rig into Programmed Scan mode by pressing the PMS key.===full menu options list===1Display Dimmer Level2VFO Dial Step Size3VFO/Mem Ch Step Size (SSB/CW)4VFO/Mem Ch Step Size (AM)5VFO/Mem Ch Step Size (FM)6CW Sidetone/BFO Pitch7CW Keyer Weight (Dash:Dot ratio)8CW Sidetone Level9CW Delay Time (Rx Recovery Time)10DSP CW Filter Bandwidth11DSP Noise Reduction Level12CTCSS Tone Frequency13DCS Code #14Auto Rptr Shift (144 MHz)15Auto Rptr Shift (430 MHz)16Rptr Shift Magnitude (29 MHz)17Rptr Shift Magnitude (50 MHz)18Rptr Shift Magnitude (144 MHz)19Rptr Shift Magnitude (430 MHz)20SSB Monitor Audio Level21"Beep" Tone Pitch22"Beep" Tone Audio Level23FM Packet Baud Rate24Tx Mode Multimeter Readout25FM Mode Mic Gain26Scan-Resume Pause Time27[Lock] Switch Mode2850 MHz Antenna Port Selection29Rx Preamp Selection (144 MHz)30RX Preamp Selection (430 MHz)31[Tuner] Switch Control Function32Mic. Up/Dwn Sw. Control Function33CW Filter Activation34Satellite Mode TX Meter Function35Satellite Memory Alpha Labels36Satellite Auto-Memory Function37Data-Transfer Baud Rate38Clear All Memories39Microprocessor Full Reset40useless function41One-Way Cross-Band Repeater Mode42Menu Expansion (To #90 ~ 96)90TX DCS Code Inversion91RX DCS Code Inversion92TX Carrier Injection Point (USB)93Rx Carrier Injection Point (LSB)94Cloning Data Transfer Baud Rate95Clone Mode "SEND"96Clone Mode "RECEIVE"==modification====technical=====microphone pinout===[[Image:yaesuft847px02.png]]===modification======hidden menus===There are special menus on the FT-847. One, documented in the Operating Manual, is accessed by changing Menu #42 EXTEND to ON. Alignment menu - not mentioned in the manual. To access this menu, you need the standard mike with the UP, DOWN, and FAST buttons. Hold down these three buttons simultaneously and turn on the radio using the power switch. This will place you into the alignment menu. Doing this does not cause a reset of your radio.==references and resources==*[http://www.supercontrol.de/cat/ft847faq/ft847faq.htm FAQ for the Yaesu FT-847 transceiver]