Yaesu FT-991 Operating Manual

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

Contents

Page 21FT-991 O PERA T I N G M A N U A Lfront panel controls & switchesMain Tuning Dial KnobThis large knob adjusts the operating frequency ofVFO-A.Rotate clockwise to increase the operating frequencyand rotate counter-clockwise to decrease the operat-ing frequency.operAting Mode 1 Step 1 diAl rotAtionLSB/USB/CW/RTTY/DATA-LSB/DATA-USB/AM5 H z (100 H z)10 H z (100 H z)1 kH z (200 kH z)2 kH z (20 kH z)FM/DATA-FM/C4FM 100 H z (1 kH z) 20 kH z (200 kH z)Numbers in parentheses indicate steps when the FAST button is On.A dvice :The tuning steps for the Main Dial knob are setat the factory to: 10Hz (SSB/AM), 5 Hz (CW/RTTY/DATA-LSB/DATA-USB) and 100 Hz (FM/DATA-FM/C4FM) per step.In LSB, USB, CW, RTTY, DATA-LSB or DATA-USB mode, the frequency change amount (stepwidth) may be toggled between “5Hz” and “10Hz”by pressing the F(M-LIST) button, and then touch-ing [5/10Hz] on the LCD.FAST ButtonPressing this button will change the tuning of theMain Tuning Dial knob (VFO-A) to a higher steprate.Press this button to double the main dial frequencyvariation. “ ” in the LED indicator area will lightup.Press this button again to restore the frequency varia-tion to the original value. “ ” will disappear.LOCK ButtonThis button toggles on/off locking of the Main Tun-ing Dial knob.Press this button to lock the main dial operations.“ ” will light up in the LED indicator area.Press this button again to unlock the main dial opera-tions. “ ” will disappear.CLAR ButtonDuring reception, press this button, then rotate theCLAR/VFO-B knob to adjust the VFO-ARX clarifier offset value (see page 34).m The clarifier offset value (frequency) can be re-stored to “0 (zero)” by pressing the CLAR buttonfor more than 1 second.m Depending on the menu mode “040 CLARMODE SELECT” setting, this button can work asthe TX clarifier for changing only the transmitfrequency (see page 73) or RX/TX clarifier forboth receiving and transmitting (see page 34,73).V/M ButtonThis button toggles frequency control between VFO-A and the memory system.m Pressing this button alternately recalls the VFOfrequency data and the frequency data saved in amemory channel by turns.AM ButtonPressing and holding this key for one second (untilthe double beep) copies the current operating datainto the currently selected memory channel, over-writing any previous data stored there.Press this button briefly to display the memory checkfunction screen, where the data saved in a memorychannel may be reviewed.m While displaying memory data, rotate the MULTIknob to review the data in each memory channel.Press this button again, to close the memory listscreen.SPLIT ButtonPress this button to operate split frequency betweenVFO-A (used for reception) and VFO-B (used fortransmission) (see page 74).m Press and hold in the SPLIT button for one sec-ond to engage the “Quick Split” (see page 74)feature. VFO-B transmit will automatically beset to a frequency 5 kHz higher than the VFO-Areceive frequency, with the same operating mode.The transceiver will operate in the Split mode.CLAR/VFO-B KnobDuring the VFO-A operation, rotate this knob to ad-just the clarifier.During Split operation, this knob adjusts the operat-ing frequency of VFO-B.RF GAIN KnobAdjust the receiver gain of the high frequency andmid-range frequency amplifier stages.m Rotate the knob clockwise to increase the gain.Rotate the knob fully clockwise to set the gain tothe highest level for normal operations.AF GAIN KnobThe AF GAIN knob sets the receiver audio volumelevel.m Rotate the knob clockwise to increase the receiv-er audio volume level.