Table Of Contents - Yaesu FT-991A Operating Manual

General Description ............................................. 1
Table of Contents ................................................. 3
Safety Precautions ................................................ 5
Accessories & Options ......................................... 7
Supplied Accessories ............................................7
Available Options .................................................8
Before You Begin .................................................. 9
Base Station Wire Stand .......................................9
Adjusting the Main Tuning Dial Torque ...............9
Adjusting the Clock ............................................10
Inputting the Call Sign ........................................ 11
Resetting the Microprocessor .............................12
Antenna Considerations ......................................13
About Coaxial Cable ..........................................13
Grounding ...........................................................14
Connection of Antenna and Power Cables .........15
Installation and Interconnections ..................... 16
Connection of Microphone, Headphone and
Remote Control Keypad ...16
Key, Keyer, and Computer-Driven Keying
VL-1000 Linear Amplifier Interconnections ......18
Plug/Connector Pinout Diagrams .......................19
Front Panel Controls & Switches ..................... 20
About the Display ............................................... 24
TFT Liquid Crystal Display ...............................24
LED Indicators ...................................................26
Rear Panel ........................................................... 27
MH-31A8J Microphone Switches ..................... 29
Optional MH-36E8J Microphone Switches ..... 31
Basic Operation: Receiving on Amateur Bands ... 32
Operation on 60-Meter ( 5 MHz ) Band
( U.S. and U.K. version only ) ...35
CLAR ( Clarifier ) Operation ...............................36
LOCK .................................................................37
DIMMER ............................................................37
VFO COLOR ......................................................38
Convenience Features ........................................ 39
Band Stack Operation .........................................39
C.S ( Custom Switch ) ..........................................39
AMS ( Automatic Mode Select ) Operation .........40
SCOPE ................................................................42
More Frequency Navigation Techniques ............44
Receiver Operation ( Front End Block Diagram ) ...46
Interference Rejection ....................................... 47
ATT ( Attenuator ) ................................................47
IPO ( Intercept Point Optimization ) ....................48
IF Noise Blanker ( NB ) Operation ......................49
CONTOUR Control Operation ...........................50
IF SHIFT Operation
( SSB/CW/RTTY/DATA Modes ) ...51
F T-991 Operating Manual
Interconnections ...17

Table of Contents

WIDTH ( IF DSP Bandwidth ) Tuning
( SSB/CW/RTTY/DATA Modes ) ...52
NARROW ( NAR ) One-Touch IF Filter Selection ...54
IF NOTCH Filter Operation
( SSB/CW/RTTY/DATA/AM Modes ) .................55
Digital NOTCH Filter ( DNF ) Operation ............56
Digital Noise Reduction ( DNR ) Operation ........56
Tools for Comfortable and Effective Reception... 57
RF Gain ..............................................................57
Audio Peak Filter ................................................58
AGC ( Automatic Gain Control ) .........................59
Adjustable Receiver Audio Filter .......................60
SSB/AM Mode Transmission ............................ 61
Using the Automatic Antenna Tuner ................ 63
ATU Operation ...................................................63
About ATU Operation .........................................64
Enhancing Transmit Signal Quality ................. 65
Parametric Microphone Equalizer
Using the Speech Processor ( SSB Mode ) ..........68
Adjusting the SSB Transmitted Bandwidth
Transmitter Convenience Features .................. 70
Voice Memory ( SSB/AM modes ) .......................70
VOX (SSB/AM/FM Modes: Automatic
TX/RX Switching using Voice Control) ...72
MONITOR ( SSB/AM modes ) ............................74
Split Operation Using the TX Clarifier ...............75
Split-Frequency Operation .................................76
CW Mode Operation ......................................... 78
Setup for Straight Key
( and Straight Key emulation ) Operation ...78
Using the Built-in Electronic Keyer ...................80
CW Convenience Features ................................ 84
CW Spotting ( Zero-Beating ) ..............................84
CW Delay Time Setting ......................................85
CW Pitch Adjustment .........................................85
Contest Memory Keyer ......................................86
FM Mode Operation .......................................... 93
Basic Operation ..................................................93
Repeater Operation .............................................94
DCS Operation ...................................................96
Tone Squelch Operation .....................................96
C4FM Mode ( Digital Mode ) Operation ........... 97
DG-ID/DP-ID Features ...................................... 99
Digital Group ID (DG-ID) feature......................99
Digital Personal ID (DP-ID) feature .................101
Memory Operation .......................................... 103
Convenient Memory functions .........................103
QMB ( Quick Memory Bank ) ...........................103
Standard Memory Operation ............................104
Memory Groups ................................................ 110
( SSB/AM mode ) ...65
( SSB Mode ) ...69
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