Yaesu FT-891 Product guide

FT-891
CAT OperATiOn
reFerenCe BOOk
YAESU MUSEN CO., LTD.

FT-891 CAT Operation Reference Book
1
CAT (Computer Aided Transceiver)Operation
Overview
Connection
USB
USB
FT-891
Personal Computer
Commercially available
USB Cable
Figure 1
YAESU MUSEN does not produce CAT System
operating software due to the wide variety of
personal computers and operating systems in
use today. However, the information provided
in this chapter explains the serial data structure
and opcodes used by the CAT system. This
information, along with the short programming
examples, is intended to help you start writing
programs on your own. As you become more
familiar with CAT operation, you can customize
programs for your operating needs and utilize
the full operating potential of this system.
The CAT (Computer Aided Transceiver) System
in the FT-891 transceiver provides control of
frequency, VFO, memory, and other settings such
as dual-channel memories and diversity reception
using an external personal computer. This allows
multiple control operations to be fully automated
with single mouse clicks, or keystroke operations
on the computer keyboard.
Using the USB Cable (Refer to gure 1)
Note: A USB driver is required for remote control
from a computer. Download the driver from
the Yaesu website (http://www.yaesu.com).
The FT-891 transceiver has a built-in USB to Dual
UART Bridge, allowing direct connection from
the rear-panel USB jack to the USB jack of your
computer without the need of any external boxes.
You will need a USB cable to connect to the USB
jack on your computer.

FT-891 CAT Operation Reference Book
2
CAT (Computer Aided Transceiver)Operation
Control Command
A computer control command is composed of an
alphabetical command, various parameters, and
the terminator that signals the end of the control
command.
Example:
Set the VFO-A frequency to 14.250000 MHz.
FA 014250000 ;
   
Command Parameter Terminator
There are three commands for the FT-891 as
shown below:
Set command: Set a particular condition
(to the FT-891)
Read command: Reads an answer
(from the FT-891)
Answer command: Transmits a condition
(from the FT-891)
For example, note the following case of the FA
command (Set the VFO-A frequency):
To set the VFO-A frequency to 14.250000 MHz, the
following command is sent from the computer to the
transceiver:
“FA014250000;” (Set command)
To read the VFO-A frequency, the following com-
mand is sent from the computer to the transceiver:
“FA;” (Read command)
When the Read command above has been sent, the
following command is returned to the computer:
“FA014250000;” (Answer command)
Alphabetical Commands
A command consists of 2 alphabetical characters.
You may use either lower or upper case charac-
ters. The commands available for this transceiver
are listed in the “PC Control Command Tables” on
the following pages.
Parameters
Parameters are used to specify information neces-
sary to implement the desired command.
The parameters to be used for each command are
predetermined. The number of digits assigned to
each parameter is also predetermined. Refer to
the “Control Command List” and the “Control Com-
mand Tables” to congure the appropriate parame-
ters.
When configuring parameters, be careful not to
make the following mistakes.
For example,
when the correct parameter is “IS0+1000” (IF
SHIFT):
IS01000;
 Notenoughparametersspecied(Nodirection(+)
given for the IF shift)
IS0+100;
Not enough digits (Only three frequency digits
given)
IS0_+_1000;
Unnecessary characters between parameters
IS0+10000;
Too many digits (Five frequency digits given)
Note: If a particular parameter is not applicable to
the FT-891, the parameter digits should be filled
using any character except the ASCII control codes
(00 to 1Fh) and the terminator (;).
Terminator
To signal the end of a command, it is necessary to
use a semicolon (;). The digit where this special
character must appear differs depending on the
command used.

FT-891 CAT Operation Reference Book
3
CAT (Computer Aided Transceiver)Operation
Command Function Set Read Ans. AI
AB VFO-A TO VFO-B O X X X
AC ANTENNA TUNER
CONTROL OOOO
AG AF GAIN O O O O
AI AUTO INFORMATION O O O X
AM VFO-A TO MEMORY
CHANNEL O X X X
BA VFO-B TO VFO-A O X X X
BC AUTO NOTCH O O O O
BD BAND DOWN O X X X
BI BREAK-IN O O O O
BP MANUAL NOTCH O O O O
BS BAND SELECT O X X X
BU BAND UP O X X X
BY BUSY X O O O
CF CLAR O O O O
CH CHANNEL UP/DOWN O X X X
CN CTCSS/DCS NUMBER O O O O
CO CONTOUR O O O O
CS CW SPOT O O O O
CT CTCSS O O O O
DA DIMMER O O O X
DN DOWN O X X X
ED ENCORDER DOWN O X X X
EK ENT KEY O X X X
EU ENCORDER UP O X X X
EX MENU O O O O
FA FREQUENCY VFO-A O O O X
FB FREQUENCY VFO-B O O O X
FS FAST STEP O O O O
GT AGC FUNCTION O O O O
ID IDENTIFICATION X O O X
IF INFORMATION X O O O
IS IF-SHIFT O O O O
KM KEYER MEMORY O O O X
KP KEY PITCH O O O O
KR KEYER O O O O
KS KEY SPEED O O O O
KY CW KEYING O X X X
LK LOCK O O O O
LM LOAD MESSAGE O O O X
MA MEMORY CHANNEL TO
VFO-A O X X X
MC MEMORY CHANNEL O O O X
MD MODE O O O O
MG MIC GAIN O O O O
ML MONITOR LEVEL O O O O
MR MEMORY READ X O O X
MS METER SW O O O O
MT MEMORY WRITE & TAG O X X X
MW MEMORY WRITE O X X X
MX MOX SET O O O O
NA NARROW O O O O
NB NOISE BLANKER O O O O
NL NOISE BLANKER
LEVEL OOOO
NR NOISE REDUCTION O O O O
OI OPPOSITE BAND
NFORMATION X O O O
OS OFFSET (Repeater
Shift) OOOO
PA PRE-AMP (IPO) O O O O
PB PLAY BACK O O O X
PC POWER CONTROL O O O O
PL SPEECH PROCESSOR
LEVEL OOOO
Command Function Set Read Ans. AI
PR SPEECH PROCESSOR O O O O
PS POWER SWITCH O O O X
QI QMB STORE O X X X
QR QMB RECALL O X X X
QS QUICK SPLIT O X X X
RA RF ATTENUATOR OOOO
RC CLAR CLEAR O X X X
RD CLAR DOWN O X X X
RG RF GAIN O O O O
RI RADIO INFORMATION X O O O
RL NOISE REDUCTION
LEVEL OOOO
RM READ METER X O O O
RS RADIO STATUS X O O O
RU CLAR UP O X X X
SC SCAN O O O O
SD SEMI BREAK-IN DELAY
TIME OOOO
SH WIDTH O O O O
SM S METER X O O X
SQ SQUELCH LEVEL O O O O
ST SPLIT O O O O
SV SWAP VFO O X X X
TS TXW O O O O
TX TX SET O O O O
UL UNLOCK X O O O
UP UP O X X X
VD VOX DELAY TIME OOOO
VG VOX GAIN O O O O
VM [V/M]KEY FUNCTION O X X X
VX VOX O O O O
ZI ZERO IN O X X X

FT-891 CAT Operation Reference Book
4
CAT (Computer Aided Transceiver)Operation
AB VFO-A TO VFO-B
Set 12345678910
A B ;
Read 12345678910
Answer 12345678910
AC ANTENNA TUNER CONTROL
Set 12345678910P1 0:
(Fixed)P3 0: Tuner “OFF”
P2 0:
(Fixed)1: Tuner “ON”
2: Tuning Start
A C P1 P2 P3 ;
Read 12345678910
A C ;
Answer 12345678910
A C P1 P2 P3 ;
AG AF GAIN
Set 12345678910P1 0:
(Fixed)
P2 000 - 255
A G P1 P2 P2 P2 ;
Read 12345678910
A G P1 ;
Answer 12345678910
A G P1 P2 P2 P2 ;
AI AUTO INFORMATION
Set 12345678910P1 0: Auto Information “OFF”
1: Auto Information “ON”
This parameter is set to “0” (OFF) automatically when the transceiver is turned “OFF”.
A I P1 ;
Read 12345678910
A I ;
Answer 12345678910
A I P1 ;
AM VFO-A TO MEMORY CHANNEL
Set 12345678910
A M ;
Read 12345678910
Answer 12345678910
BA VFO-B TO VFO-A
Set 12345678910
B A ;
Read 12345678910
Answer 12345678910
BC AUTO NOTCH
Set 12345678910P1 0:
(Fixed)
P2 0: Auto Notch “OFF”
1: Auto Notch “ON”
B C P1 P2 ;
Read 12345678910
B C P1 ;
Answer 12345678910
B C P1 P2 ;
BD BAND DOWN
Set 12345678910P1 0:
(Fixed)
B D P1 ;
Read 12345678910
Answer 12345678910

FT-891 CAT Operation Reference Book
5
CAT (Computer Aided Transceiver)Operation
BI BREAK-IN
Set 12345678910P1 0: Break-in “OFF”
1: Break-in “ON”
B I P1 ;
Read 12345678910
B I ;
Answer 12345678910
B I P1 ;
BP MANUAL NOTCH
Set 12345678910P1 0:
(Fixed)P3 P2=0
P2 0: Manual NOTCH “ON/OFF” 000: “OFF”
1: Manual NOTCH LEVEL 001: “ON”
P2=1
001 - 320
(NOTCH Frequency : x 10 Hz )
B P P1 P2 P3 P3 P3 ;
Read 12345678910
B P P1 P2 ;
Answer 12345678910
B P P1 P2 P3 P3 P3 ;
BS BAND SELECT
Set 12345678910P1 00: 1.8 MHz 06: 18 MHz 12: MW
01: 3.5 MHz 07: 21 MHz
02: - 08: 24.5 MHz
03: 7 MHz 09: 28 MHz
04: 10 MHz 10: 50 MHz
05: 14 MHz 11: GEN
B S P1 P1 ;
Read 12345678910
Answer 12345678910
BU BAND UP
Set 12345678910P1 0:
(Fixed)
B U P1 ;
Read 12345678910
Answer 12345678910
BY BUSY
Set 12345678910P1 0: RX BUSY “OFF”
1: RX BUSY “ON”
P2 0:
(Fixed)
Read 12345678910
B Y ;
Answer 12345678910
B Y P1 P2 ;
CF CLAR
Set 12345678910P1 0:
(Fixed)
P2 0: CLAR “OFF”
1: CLAR “ON”
P3 0:
(Fixed)
C F P1 P2 P3 ;
Read 12345678910
C F P1 ;
Answer 12345678910
C F P1 P2 P3 ;
CH CHANNEL UP/DOWN
Set 12345678910P1 0: Memory Channel “UP”
1: Memory Channel “DOWN”
C H P1 ;
Read 12345678910
Answer 12345678910
CN CTCSS TONE FREQUENCY
Set 12345678910P1 0:
(Fixed)
P2 0: CTCSS
1: DCS
P3 P2=0 000 - 049: Tone Frequency Number (See Table 1, page 6)
P2=1 000 - 103: DCS Code Number (See Table 2, page6)
C N P1 P2 P3 P3 P3 ;
Read 12345678910
C N P1 P2 ;
Answer 12345678910
C N P1 P2 P3 P3 P3 ;

FT-891 CAT Operation Reference Book
6
CAT (Computer Aided Transceiver)Operation
CO CONTOUR
Set 12345678910P1 0:
(Fixed)P3 P2=0 0000: CONTOUR “OFF”
P2 0: CONTOUR “ON/OFF” 0001: CONTOUR “ON”
1: CONTOUR FREQ P2=1 0010 - 3200
2: APF “ON/OFF” (CONTOUR Frequency:10 - 3200 Hz)
3: APF FREQ P2=2 0000: APF “OFF”
0001: APF “ON”
P2=3 0000 - 0050 (
APF Frequency : -250 - 250 Hz )
C O P1 P2 P3 P3 P3 P3 ;
Read 12345678910
C O P1 P2 ;
Answer 12345678910
C O P1 P2 P3 P3 P3 P3 ;
CS CW SPOT
Set 12345678910P1 0: OFF
1: ON
C S P1 ;
Read 12345678910
C S ;
Answer 12345678910
C S P1 ;
CT CTCSS
Set 12345678910P1 0:
(Fixed)
P2 0: CTCSS “OFF”
1: CTCSS ENC/DEC “ON”
2: CTCSS ENC “ON”
3: DCS “ON”
C T P1 P2 ;
Read 12345678910
C T P1 ;
Answer 12345678910
C T P1 P2 ;
Table 1 (CTCSS Tone Chart)
000 67.0 Hz 009 91.5 Hz 018 123.0 Hz 027 162.2 Hz 036 189.9 Hz 045 229.1 Hz
001 69.3 Hz 010 94.8 Hz 019 127.3 Hz 028 165.5 Hz 037 192.8 Hz 046 233.6 Hz
002 71.9 Hz 011 97.4 Hz 020 131.8 Hz 029 167.9 Hz 038 196.6 Hz 047 241.8 Hz
003 74.4 Hz 012 100.0 Hz 021 136.5 Hz 030 171.3 Hz 039 199.5 Hz 048 250.3 Hz
004 77.0 Hz 013 103.5 Hz 022 141.3 Hz 031 173.8 Hz 040 203.5 Hz 049 254.1 Hz
005 79.7 Hz 014 107.2 Hz 023 146.2 Hz 032 177.3 Hz 041 206.5 Hz - -
006 82.5 Hz 015 110.9 Hz 024 151.4 Hz 033 179.9 Hz 042 210.7 Hz - -
007 85.4 Hz 016 114.8 Hz 025 156.7 Hz 034 183.5 Hz 043 218.1 Hz - -
008 88.5 Hz 017 118.8 Hz 026 159.8 Hz 035 186.2 Hz 044 225.7 Hz - -
Table 2 (DCS Code Chart)
000 023 015 074 030 165 045 261 060 356 075 462 090 627
001 025 016 114 031 172 046 263 061 364 076 464 091 631
002 026 017 115 032 174 047 265 062 365 077 465 092 632
003 031 018 116 033 205 048 266 063 371 078 466 093 654
004 032 019 122 034 212 049 271 064 411 079 503 094 662
005 036 020 125 035 223 050 274 065 412 080 506 095 664
006 043 021 131 036 225 051 306 066 413 081 516 096 703
007 047 022 132 037 226 052 311 067 423 082 523 097 712
008 051 023 134 038 243 053 315 068 431 083 526 098 723
009 053 024 143 039 244 054 325 069 432 084 532 099 731
010 054 025 145 040 245 055 331 070 445 085 546 100 732
011 065 026 152 041 246 056 332 071 446 086 565 101 734
012 071 027 155 042 251 057 343 072 452 087 606 102 743
013 072 028 156 043 252 058 346 073 454 088 612 103 754
014 073 029 162 044 255 059 351 074 455 089 624 - -
DA DIMMER
Set
12345678910P1 01 - 15: LCD Contrast Level
P2 01 - 15: Dimmer Backligt Level
P3 00 - 15: Dimmer LCD Level
P4 00 - 15: Dimmer TX/BUSY Level
D A P1 P1 P2 P2 P3 P3 P4 P4
11 12 13 14 15 16 17 18 19 20
;
Read 12345678910
D A ;
Answer
12345678910
D A P1 P1 P2 P2 P3 P3 P4 P4
11 12 13 14 15 16 17 18 19 20
;

FT-891 CAT Operation Reference Book
7
CAT (Computer Aided Transceiver)Operation
DN MIC DWN
Set 12345678910
D N ;
Read 12345678910
Answer 12345678910
ED ENCORDER DOWN
Set 12345678910P1 0: MAIN ENCORDER
8: MULTI FUNCTION KNOB
P2 01 - 99: Steps
E D P1 P2 P2 ;
Read 12345678910
Answer 12345678910
EK ENT KEY
Set 12345678910
E K ;
Read 12345678910
Answer 12345678910
EU ENCORDER UP
Set 12345678910P1 0: MAIN ENCORDER
8: MULTI FUNCTION KNOB
P2 01 - 99: Steps
E U P1 P2 P2 ;
Read 12345678910
Answer 12345678910
EX MENU
Set 1234567~n-1 n P1 : 0101 - 1803 (MENU Number)
P2 : Parameter (See Table below)
E X P1 P1 P1 P1 P2 ~P2 ;
Read 12345678910
E X P1 P1 P1 P1 ;
Answer 1234567~n-1 n
E X P1 P1 P1 P1 P2 ~P2 ;
P1 Function P2 Digits
0101 AGC FAST DELAY 20 - 4000 (msec) (P2= 0020 - 4000, 20 msec/step) 4
0102 AGC MID DELAY 20 - 4000 (msec) (P2= 0020 - 4000, 20 msec/step) 4
0103 AGC SLOW DELAY 20 - 4000 (msec) (P2= 0020 - 4000, 20 msec/step) 4
0201 LCD CONTRAST 01 - 15 2
0202 DIMMER BACKLIT 01 - 15 2
0203 DIMMER LCD 01 - 15 2
0204 DIMMER TX/BUSY 01 - 15 2
0205 PEAK HOLD 0: OFF 1: 0.5 sec 2: 1.0 sec 3: 2.0 sec 1
0206 ZIN LED 0: DISABLE 1: ENABLE 1
0207 POP-UP MENU 0: UPPER 1: LOWER 1
0301 DVS RX OUT LVL 000 - 100 (P2= 000 - 100) 3
0302 DVS TX OUT LVL 000 - 100 (P2= 000 - 100) 3
0401 KEYER TYPE 0: OFF 1: BUG 2: ELEKEY-A 3: ELEKEY-B 4: ELEKEY-Y 5: ACS 1
0402 KEYER DOT/DASH 0: NOR 1: REV 1
0403 CW WEIGHT 2.5 - 4.5 (P2= 25 - 45) 2
0404 BEACON INTERVAL OFF/1 - 690 sec (P2= 000 - 690, 000: OFF) 3
0405 NUMBER STYLE 0: 1290 1: AUNO 2: AUNT 3: A2NO 4: A2NT 5: 12NO 6: 12NT 1
0406 CONTEST NUMBER 0000 - 9999 4
0407 CW MEMORY 1 0: TEXT 1: MESSAGE 1
0408 CW MEMORY 2 0: TEXT 1: MESSAGE 1
0409 CW MEMORY 3 0: TEXT 1: MESSAGE 1
0410 CW MEMORY 4 0: TEXT 1: MESSAGE 1
0411 CW MEMORY 5 0: TEXT 1: MESSAGE 1
0501 NB WIDTH 0: 1 msec 1: 3 msec 2: 10 msec 1
0502 NB REJECTION 0: 10 dB 1: 30 dB 2: 50 dB 1
0503 NB LEVEL 0 - 10 (P2= 00 - 10) 2
0504 BEEP LEVEL 0 - 100 (P2= 000 - 100) 3
0505 RF/SQL VR 0: RF 1: SQL 1
0506 CAT RATE 0: 4800 bps 1: 9600 bps 2: 19200 bps 3: 38400 bps 1
0507 CAT TOT 0: 10 msec 1: 100 msec 2: 1000 msec 3: 3000 msec 1
0508 CAT RTS 0: DISABLE 1: ENABLE 1

FT-891 CAT Operation Reference Book
8
CAT (Computer Aided Transceiver)Operation
P1 Function P2 Digits
0509 MEM GROUP 0: DISABLE 1: ENABLE 1
0510 FM SETTING 0: DISABLE 1: ENABLE 1
0511 REC SETTING 0: DISABLE 1: ENABLE 1
0512 ATAS SETTING 0: DISABLE 1: ENABLE 1
0513 QUICK SPL FREQ -20 kHz - +00 (or -00) - +20 kHz (P2= -20 - +00 or -00 - +20) 3
0514 TX TOT 00 - 30 min (P2= 00 - 30, 00: OFF) 2
0515 MIC SCAN 0: DISABLE 1: ENABLE 1
0516 MIC SCAN RESUME 0: PAUSE 1: TIME 1
0517 REF FREQ ADJ -25 - +00 (or -00) - +25 (P2= -25 - +00 or -00 - +25) 3
0518 CLAR SELECT 0: RX 1: TX 2: TRX 1
0519 APO 0: OFF 1: 1 h 2: 2 h 3: 4 h 4: 6 h 5: 8 h 6: 10 h 7: 12 h 1
0520 FAN CONTROL 0: NORMAL 1: CONTEST 1
0601 AM LCUT FREQ 00: OFF 01: 100 Hz - 19: 1000 Hz (50 Hz steps) 2
0602 AM LCUT SLOPE 0: 6 dB/oct 1: 18 dB/oct 1
0603 AM HCUT FREQ 00: OFF 01: 700 Hz - 67: 4000 Hz (50 Hz steps) 2
0604 AM HCUT SLOPE 0: 6 dB/oct 1: 18 dB/oct 1
0605 AM MIC SELECT 0: MIC 1: REAR 1
0606 AM OUT LEVEL 0 - 100 (P2= 000 - 100) 3
0607 AM PTT SELECT 0: DAKY 1: RTS 2: DTR 1
0701 CW LCUT FREQ 00: OFF 01: 100 Hz - 19: 1000 Hz (50 Hz steps) 2
0702 CW LCUT SLOPE 0: 6 dB/oct 1: 18 dB/oct 1
0703 CW HCUT FREQ 00: OFF 01: 700 Hz - 67: 4000 Hz (50 Hz steps) 2
0704 CW HCUT SLOPE 0: 6 dB/oct 1: 18 dB/oct 1
0705 CW OUT LEVEL 0 - 100 (P2= 000 - 100) 3
0706 CW AUTO MODE 0: OFF 1: 50M 2: ON 1
0707 CW BFO 0: USB 1: LSB 2: AUTO 1
0708 CW BK-IN TYPE 0: SEMI 1: FULL 1
0709 CW BK-IN DELAY 30 - 3000 msec (P2= 0030 - 3000) (10 msec/step) 4
0710 CW WAVE SHAPE 1: 2 msec 2: 4 msec 1
0711 CW FREQ DISPLAY 0: FREQ 1: PITCH 1
0712 PC KEYING 0: OFF 1: DAKY 2: RTS 3: DTR 1
0713 QSK DELAY TIME 0: 15 msec 1: 20 msec 2: 25 msec 3: 30 msec 1
0801 DATA MODE 0: PSK 1: OTHERS 1
0802 PSK TONE 0: 1000 Hz 1: 1500 Hz 2: 2000 Hz 1
0803 OTHER DISP -3000 Hz - 0 - +3000 Hz (P2= -3000 - -0000 or +0000 - +3000) (10 Hz/steps) 5
0804 OTHER SHIFT -3000 Hz - 0 - +3000 Hz (P2= -3000 - -0000 or +0000 - +3000) (10 Hz/steps) 5
0805 DATA LCUT FREQ 00: OFF 01: 100 Hz - 19: 1000 Hz (50 Hz steps) 2
0806 DATA LCUT SLOPE 0: 6 dB/oct 1: 18 dB/oct 1
0807 DATA HCUT FREQ 00: OFF 01: 700 Hz - 67: 4000 Hz (50 Hz steps) 2
0808 DATA HCUT SLOPE 0: 6 dB/oct 1: 18 dB/oct 1
0809 DATA IN SELECT 0: MIC 1: REAR 1
0810 DATA PTT SELECT 0: DAKY 1: RTS 2: DTR 1
0811 DATA OUT LEVEL 0 - 100 (P2= 000 - 100) 3
0812 DATA BFO 0: USB 1: LSB 1
0901 FM MIC SELECT 0: MIC 1: REAR 1
0902 FM OUT LEVEL 0 - 100 (P2= 000 - 100) 3
0903 PKT PTT SELECT 0: DAKY 1: RTS 2: DTR 1
0904 RPT SHIFT 28MHz 0 - 1000 kHz (P2= 0000 - 1000) (10 kHz/step) 4
0905 RPT SHIFT 50MHz 0 - 4000 kHz (P2= 0000 - 4000) (10 kHz/step) 1
0906 DCS POLARITY 0: Tn-Rn 1: Tn-Riv 2: Tiv-Rn 3: Tiv-Riv 1
1001 RTTY LCUT FREQ 00: OFF 01: 100 Hz - 19: 1000 Hz (50 Hz steps) 2
1002 RTTY LCUT SLOPE 0: 6 dB/oct 1: 18 dB/oct 1
1003 RTTY HCUT FREQ 00: OFF 01: 700 Hz - 67: 4000 Hz (50 Hz steps) 2
1004 RTTY HCUT SLOPE 0: 6 dB/oct 1: 18 dB/oct 1
1005 RTTY SHIFT PORT 0: SHIFT 1: DTR 2: RTS 1
1006 RTTY POLARITY-R 0: NOR 1: REV 1
1007 RTTY POLARITY-T 0: NOR 1: REV 1
1008 RTTY OUT LEVEL 0 - 100 (P2= 000 - 100) 3
1009 RTTY SHIFT FREQ 0: 170 Hz 1: 200 Hz 2: 425 Hz 3: 850 Hz 1
1010 RTTY MARK FREQ 0: 1275 Hz 1: 2125 Hz 1
1011 RTTY BFO 0: USB 1: LSB 1
1101 SSB LCUT FREQ 00: OFF 01: 100 Hz - 19: 1000 Hz (50 Hz steps) 2
1102 SSB LCUT SLOPE 0: 6 dB/oct 1: 18 dB/oct 1
1103 SSB HCUT FREQ 00: OFF 01: 700 Hz - 67: 4000 Hz (50 Hz steps) 2
1104 SSB HCUT SLOPE 0: 6 dB/oct 1: 18 dB/oct 1
1105 SSB MIC SELECT 0: MIC 1: REAR 1
1106 SSB OUT LEVEL 0 - 100 (P2= 000 - 100) 3
1107 SSB BFO 0: USB 1: LSB 2: AUTO 1
1108 SSB PTT SELECT 0: DAKY 1: RTS 2: DTR 1
1109 SSB TX BPF 0: 100-3000 1: 100-2900 2: 200-2800 3: 300-2700 4: 400-2600 1
1201 APF WIDTH 0: NARROW 1: MEDIUM 2: WIDE 1
1202 CONTOUR LEVEL -40 - 0 - +20 (P2= -40 - -00 or +00 - +20) 3
1203 CONTOUR WIDTH 01 - 11 2
1204 IF NOTCH WIDTH 0: NARROW 1: WIDE 1
1301 SCP START CYCLE 0: OFF 1: 3 sec 2: 5 sec 3: 10 sec 1
1302 SCP SPAN FREQ 0: 37.5 kHz 1: 75 kHz 2: 150 kHz 3: 375 kHz 4: 750 kHz 1
1401 QUICK DIAL 0: 50 kHz 1: 100 kHz 2: 500 kHz 1
1402 SSB DIAL STEP 0: 2 Hz 1: 5 Hz 2: 10 Hz 1
1403 AM DIAL STEP 0: 10 Hz 1: 100 Hz 1
1404 FM DIAL STEP 0: 10 Hz 1: 100 Hz 1
1405 DIAL STEP 0: 2 Hz 1: 5 Hz 2: 10 Hz 1
1406 AM CH STEP 0: 2.5 kHz 1: 5 kHz 2: 9 kHz 3: 10 kHz 4: 12.5 kHz 5: 25 kHz 1

FT-891 CAT Operation Reference Book
9
CAT (Computer Aided Transceiver)Operation
P1 Function P2 Digits
1407 FM CH STEP 0: 5 kHz 1: 6.25 kHz 2: 10 kHz 3: 12.5 kHz 4: 15 kHz 5: 20 kHz 6: 25 kHz 1
1501 EQ1 FREQ 00: OFF 01: 100 Hz 02: 200 Hz 03: 300 Hz 04: 400 Hz 05: 500 Hz 06: 600 Hz 07: 700 Hz 2
1502 EQ1 LEVEL -20 - 0 - +10 (P2= -20 - -00 or +00 - +10) 3
1503 EQ1 BWTH 01 - 10 2
1504 EQ2 FREQ 00: OFF 01: 700 Hz 02: 800 Hz 03: 900 Hz 04: 1000Hz 05: 1100 Hz 06: 1200 Hz 07: 1300 Hz 08: 1400 Hz
09: 1500 Hz 2
1505 EQ2 LEVEL -20 - 0 - +10 (P2= -20 - -00 or +00 - +10) 3
1506 EQ2 BWTH 01 - 10 2
1507 EQ3 FREQ 00: OFF 01: 1500 Hz 02: 1600 Hz 03: 1700 Hz 04: 1800 Hz 05: 1900 Hz 06: 2000 Hz -18: 3200 Hz 2
1508 EQ3 LEVEL -20 - 0 - +10 (P2= -20 - -00 or +00 - +10) 3
1509 EQ3 BWTH 01 - 10 2
1510 P-EQ1 FREQ 00: OFF 01: 100 Hz 02: 200 Hz 03: 300 Hz 04: 400 Hz 05: 500 Hz 06: 600 Hz 07: 700 Hz 2
1511 P-EQ1 LEVEL -20 - 0 - +10 (P2= -20 - -00 or +00 - +10) 3
1512 P-EQ1 BWTH 01 - 10 2
1513 P-EQ2 FREQ 00: OFF 01: 700 Hz 02: 800 Hz 03: 900 Hz 04: 1000Hz 05: 1100 Hz 06: 1200 Hz 07: 1300 Hz 08: 1400 Hz
09: 1500 Hz 2
1514 P-EQ2 LEVEL -20 - 0 - +10 (P2= -20 - -00 or +00 - +10) 3
1515 P-EQ2 BWTH 01 - 10 2
1516 P-EQ3 FREQ 00: OFF 01: 1500 Hz 02: 1600 Hz 03: 1700 Hz 04: 1800 Hz 05: 1900 Hz 06: 2000 Hz -18: 3200 Hz 2
1517 P-EQ3 LEVEL -20 - 0 - +10 (P2= -20 - -00 or +00 - +10) 3
1518 P-EQ3 BWTH 01 - 10 2
1601 HF SSB PWR 5 - 100 (P2= 005 - 100) 3
1602 HF AM PWR 5 - 40 (P2= 005 - 040) 3
1603 HF PWR 5 - 100 (P2= 005 - 100) 3
1604 50M SSB PWR 5 - 100 (P2= 005 - 100) 3
1605 50M AM PWR 5 - 40 (P2= 005 - 040) 3
1606 50M PWR 5 - 100 (P2= 005 - 100) 3
1607 SSB MIC GAIN 0 - 100 (P2= 000 - 100) 3
1608 AM MIC GAIN 0 - 100 (P2= 000 - 100) 3
1609 FM MIC GAIN 0 - 100 (P2= 000 - 100) 3
1610 DATA MIC GAIN 0 - 100 (P2= 000 - 100) 3
1611 SSB DATA GAIN 0 - 100 (P2= 000 - 100) 3
1612 AM DATA GAIN 0 - 100 (P2= 000 - 100) 3
1613 FM DATA GAIN 0 - 100 (P2= 000 - 100) 3
1614 DATA DATA GAIN 0 - 100 (P2= 000 - 100) 3
1615 TUNER SELECT 0: OFF 1: EXTERNAL 2: ATAS 3: LAMP 1
1616 VOX SELECT 0: MIC 1: DATA 1
1617 VOX GAIN 0 - 100 (P2= 000 - 100) 3
1618 VOX DELAY 30 - 3000 msec (P2= 0030 - 3000) (10 msec/step) 4
1619 ANTI VOX GAIN 0 - 100 (P2= 000 - 100) 3
1620 DATA VOX GAIN 0 - 100 (P2= 000 - 100) 3
1621 DATA VOX DELAY 30 - 3000 msec (P2= 0030 - 3000) 4
1622 ANTI DVOX GAIN 0 - 100 (P2= 000 - 100) 3
1623 EMERGENCY FREQ 0: DISABLE 1: ENABLE 1
1701 RESET 0: ALL 1: DATA 2: FUNC 1
1801 MAIN VERSION 0000 - 9999 (V01-23 = 0123) 4
1802 DSP VERSION 0000 - 9999 (V01-23 = 0123) 4
1803 LCD VERSION 0000 - 9999 (V01-23 = 0123) 4
FA FREQUENCY VFO-A
Set
12345678910P1 000030000 - 056000000 (Hz)
F A P1 P1 P1 P1 P1 P1 P1 P1
11 12 13 14 15 16 17 18 19 20
P1 ;
Read 12345678910
F A ;
Answer
12345678910
F A P1 P1 P1 P1 P1 P1 P1 P1
11 12 13 14 15 16 17 18 19 20
P1 ;
FB FREQUENCY VFO-B
Set
12345678910P1 000030000 - 056000000 (Hz)
F B P1 P1 P1 P1 P1 P1 P1 P1
11 12 13 14 15 16 17 18 19 20
P1 ;
Read 12345678910
F B ;
Answer
12345678910
F B P1 P1 P1 P1 P1 P1 P1 P1
11 12 13 14 15 16 17 18 19 20
P1 ;

FT-891 CAT Operation Reference Book
10
CAT (Computer Aided Transceiver)Operation
FS FAST STEP
Set 12345678910P1 0: VFO-A FAST Key “OFF”
1: VFO-A FAST Key “ON”
F S P1 ;
Read 12345678910
F S ;
Answer 12345678910
F S P1 ;
GT AGC FUNCTION
Set 12345678910P1 0:
(Fixed)P3 0: AGC “OFF”
P2 0: AGC “OFF” 1: AGC “FAST”
1: AGC “FAST” 2: AGC “MID”
2: AGC “MID” 3: AGC “SLOW”
3: AGC “SLOW” 4: AGC “AUTO-FAST”
4: AGC “AUTO” 5: AGC “AUTO-MID”
6: AGC “AUTO-SLOW”
G T P1 P2 ;
Read 12345678910
G T P1 ;
Answer 12345678910
G T P1 P3 ;
ID IDENTIFICATION
Set 12345678910P1 0650: FT-891
Read 12345678910
I D ;
Answer 12345678910
I D P1 P1 P1 P1 ;
IF INFORMATION
Set 12345678910P1 001 - 099 (Regular Memory Channel)
P1L - P9U (PMS)
501 - 510 (5 MHz, U.S. and U.K. version only)
EMG (Emergency)
P2 VFO-A Frequency (Hz)
P3 Clarier Direction +: Plus Shift, -: Minus Shift
Clarier Offset: 0000 - 9999 (Hz)
P4 0: CLAR “OFF” 1: CLAR “ON”
P5 0:
(Fixed)
P6 MODE 1: SSB (SSB BFO) 2: SSB (SSB BFO) 3: CW 4: FM 5: AM
6: RTTY (RTTY BFO) 7: CW (CW BFO) 8: DATA (DATA BFO)
9: RTTY (RTTY BFO) A: - B: FM-N C: DATA (DATA BFO)
D: AM-N
P7 0: VFO 1: Memory 2: Memory Tune 3: - 4: - 5: PMS
P8 0: CTCSS “OFF” 1: CTCSS ENC/DEC 2: CTCSS ENC
P9 00:
(Fixed)
P10 0: Simplex 1: Plus Shift 2: Minus Shift
Read 12345678910
I F ;
Answer
12345678910
I F P1 P1 P1 P2 P2 P2 P2 P2
11 12 13 14 15 16 17 18 19 20
P2 P2 P2 P2 +/- P3 P3 P3 P3 P4
21 22 23 24 25 26 27 28 29 30
P5 P6 P7 P8 P9 P9 P10 ;
IS IF-SHIFT
Set 12345678910P1 0:(Fixed)
P2 0: OFF
1: ON
P3 0 ~ 1200 Hz (20 Hz steps)
I S P1 P2 -/+ P3 P3 P3 P3 ;
Read 12345678910
I S P1 ;
Answer 12345678910
I S P1 P2 -/+ P3 P3 P3 P3 ;
KM KEYER MEMORY
Set 1234567~53 n P1 1 - 5 : Keyer Memory Channel Number
P2 Message Characters (up to 50 characters)
K M P1 P2 P2 P2 P2 ~P2 ;
Read 12345678910
K M P1 ;
Answer 1234567~53 n
K M P1 P2 P2 P2 P2 ~P2 ;
KP KEY PITCH
Set 12345678910P1 00: 300 Hz - 75: 1050 Hz (10Hz steps)
K P P1 P1 ;
Read 12345678910
K P ;
Answer 12345678910
K P P1 P1 ;

FT-891 CAT Operation Reference Book
11
CAT (Computer Aided Transceiver)Operation
KR KEYER
Set 12345678910P1 0: KEYER “OFF”
1: KEYER “ON”
K R P1 ;
Read 12345678910
K R ;
Answer 12345678910
K R P1 ;
KS KEY SPEED
Set 12345678910P1 004 - 060 (WPM)
K S P1 P1 P1 ;
Read 12345678910
K S ;
Answer 12345678910
K S P1 P1 P1 ;
KY CW KEYING
Set 12345678910P1 1: Keyer Memory “1” Playback 6: Message Keyer “1” Playback
2: Keyer Memory “2” Playback 7: Message Keyer “2” Playback
3: Keyer Memory “3” Playback 8: Message Keyer “3” Playback
4: Keyer Memory “4” Playback 9: Message Keyer “4” Playback
5: Keyer Memory “5” Playback A: Message Keyer “5” Playback
K Y P1 ;
Read 12345678910
Answer 12345678910
LK LOCK
Set 12345678910P1 0: VFO DIAL Lock “OFF”
1: VFO DIAL Lock “ON”
L K P1 ;
Read 12345678910
L K ;
Answer 12345678910
L K P1 ;
LM LOAD MESSAGE
Set 12345678910P1 0: DVS P2 0: DVS (Recording Stop)
1: DVS (CH “1” Recording Start/Stop)
2: DVS (CH “2” Recording Start/Stop)
3: DVS (CH “3” Recording Start/Stop)
4: DVS (CH “4” Recording Start/Stop)
5: DVS (CH “5” Recording Start/Stop)
L M P1 P2 ;
Read 12345678910
L M P1 ;
Answer 12345678910
L M P1 P2 ;
MA MEMORY CHANNEL TO VFO-A
Set 12345678910
M A ;
Read 12345678910
Answer 12345678910
MC MEMORY CHANNEL
Set 12345678910P1 001 - 099: Regular Memory Channel
P1L - P9U (PMS)
M C P1 P1 P1 ;
Read 12345678910
M C ;
Answer 12345678910
M C P1 P1 P1 ;
MD OPERATING MODE
Set 12345678910P1 0: MAIN RX
P2 MODE 1: SSB (SSB BFO) 2: SSB (SSB BFO) 3: CW 4: FM 5: AM
6: RTTY (RTTY BFO) 7: CW (CW BFO) 8: DATA (DATA BFO)
9: RTTY (RTTY BFO) A: - B: FM-N C: DATA (DATA BFO)
D: AM-N
M D P1 P2 ;
Read 12345678910
M D P1 ;
Answer 12345678910
M D P1 P2 ;

FT-891 CAT Operation Reference Book
12
CAT (Computer Aided Transceiver)Operation
MG MIC GAIN
Set 12345678910P1 000 - 100
M G P1 P1 P1 ;
Read 12345678910
M G ;
Answer 12345678910
M G P1 P1 P1 ;
ML MONITOR LEVEL
Set 12345678910P1 0: MONI “ON/OFF”
1: MONI Level
P2 P1=0
000: MONI “OFF”
001: MONI “ON”
P1=1
000 - 100
M L P1 P2 P2 P2 ;
Read 12345678910
M L P1 ;
Answer 12345678910
M L P1 P2 P2 P2 ;
MR MEMORY CHANNEL READ
Set 12345678910P0/1 001 - 099 (Regular Memory Channel)
P1L - P9U (PMS)
501 - 510 (5 MHz, U.S. and U.K. version only)
EMG (Emergency)
P2 VFO-A Frequency (Hz)
P3 Clarier Direction +: Plus Shift, -: Minus Shift
Clarier Offset: 0000 - 9999 (Hz)
P4 0: CLAR “OFF” 1: CLAR “ON”
P5 0:
(Fixed)
P6 MODE 1:LSB 2: USB 3: CW 4: FM 5: AM 6: RTTY-LSB 7: CW-R
8: DATA-LSB 9: RTTY-USB A: - B: FM-N C: DATA-USB
D: AM-N
P7 0: VFO 1: Memory
P8 0: CTCSS “OFF” 1: CTCSS ENC/DEC 2: CTCSS ENC
P9 00:
(Fixed)
P10 0: Simplex 1: Plus Shift 2: Minus Shift
Read 12345678910
M R P0 P0 P0 ;
Answer
12345678910
M R P1 P1 P1 P2 P2 P2 P2 P2
11 12 13 14 15 16 17 18 19 20
P2 P2 P2 P2 +/- P3 P3 P3 P3 P4
21 22 23 24 25 26 27 28 29 30
P5 P6 P7 P8 P9 P9 P10 ;
MS METER SW
Set 12345678910P1 0: COMP
1: ALC
2: PO
3: SWR
4: ID
M S P1 ;
Read 12345678910
M S ;
Answer 12345678910
M S P1 ;
MT MEMORY WRITE & TAG
Set
12345678910P1 001 - 099 (Regular Memory Channel)
P1L - P9U (PMS)
P2 Frequency (Hz)
P3 Clarier Direction +: Plus Shift, -: Minus Shift
Clarier Offset: 0000 - 9999 (Hz)
P4 0: CLAR “OFF” 1: CLAR “ON”
P5 0:
(Fixed)
P6 MODE 1: LSB 2: USB 3: CW 4: FM 5: AM 6: RTTY-LSB 7: CW-R
8: DATA-LSB 9: RTTY-USB A: - B: FM-N C: DATA-USB
D: AM-N
P7 0:
(Fixed)
P8 0: CTCSS “OFF” 1: CTCSS ENC/DEC 2: CTCSS ENC
P9 00:
(Fixed)
P10 0: Simplex 1: Plus Shift 2: Minus Shift
P11 0: TAG “OFF” 1: TAG “ON”
P12 TAG Characters (up to 12 characters) (ASCII)
M T P1 P1 P1 P2 P2 P2 P2 P2
11 12 13 14 15 16 17 18 19 20
P2 P2 P2 P2 +/- P3 P3 P3 P3 P4
21 22 23 24 25 26 27 28 29 30
P5 P6 P7 P8 P9 P9 P10 P11 P12 P12
31 32 33 34 35 36 37 38 39 40
P12 P12 P12 P12 P12 P12 P12 P12 P12 P12
41
;
Read 12345678910
M T P0 P0 P0 ;
Answer
12345678910
M T P1 P1 P1 P2 P2 P2 P2 P2
11 12 13 14 15 16 17 18 19 20
P2 P2 P2 P2 +/- P3 P3 P3 P3 P4
21 22 23 24 25 26 27 28 29 30
P5 P6 P7 P8 P9 P9 P10 P11 P12 P12
31 32 33 34 35 36 37 38 39 40
P12 P12 P12 P12 P12 P12 P12 P12 P12 P12
41
;

FT-891 CAT Operation Reference Book
13
CAT (Computer Aided Transceiver)Operation
MW MEMORY CHANNEL WRITE
Set
12345678910P1 001 - 099 (Regular Memory Channel)
P1L - P9U (PMS)
P2 Frequency (Hz)
P3 Clarier Direction +: Plus Shift, -: Minus Shift
Clarier Offset: 0000 - 9999 (Hz)
P4 0: CLAR “OFF” 1: CLAR “ON”
P5 0:
(Fixed)
P6 MODE 1: LSB 2: USB 3: CW 4: FM 5: AM 6: RTTY-LSB 7: CW-R
8: DATA-LSB 9: RTTY-USB A: - B: FM-N C: DATA-USB
D: AM-N
P7 0:
(Fixed)
P8 0: CTCSS “OFF” 1: CTCSS ENC/DEC 2: CTCSS ENC
P9 00:
(Fixed)
P10 0: Simplex 1: Plus Shift 2: Minus Shift
M W P1 P1 P1 P2 P2 P2 P2 P2
11 12 13 14 15 16 17 18 19 20
P2 P2 P2 P2 +/- P3 P3 P3 P3 P4
21 22 23 24 25 26 27 28 29 30
P5 P6 P7 P8 P9 P9 P10 ;
Read 12345678910
Answer 12345678910
MX MOX SET
Set 12345678910P1 0: MOX “OFF”
1: MOX “ON”
M X P1 ;
Read 12345678910
M X ;
Answer 12345678910
M X P1 ;
NA NARROW
Set 12345678910P1 0:
(Fixed)
P2 0: OFF
1: ON
N A P1 P2 ;
Read 12345678910
N A P1 ;
Answer 12345678910
N A P1 P2 ;
NB NOISE BLANKER STATUS
Set 12345678910P1 0:
(Fixed)
P2 0: Noise Blanker “OFF”
1: Noise Blanker “ON”
N B P1 P2 ;
Read 12345678910
N B P1 ;
Answer 12345678910
N B P1 P2 ;
NL NOISE BLANKER LEVEL
Set 12345678910P1 0:
(Fixed)
P2 000 - 010
N L P1 P2 P2 P2 ;
Read 12345678910
N L P1 ;
Answer 12345678910
N L P1 P2 P2 P2 ;
NR NOISE REDUCTION
Set 12345678910P1 0:
(Fixed)
P2 0: Noise Reduction “OFF”
1: Noise Reduction “ON”
N R P1 P2 ;
Read 12345678910
N R P1 ;
Answer 12345678910
N R P1 P2 ;

FT-891 CAT Operation Reference Book
14
CAT (Computer Aided Transceiver)Operation
OI OPPOSITE BAND INFORMATION
Set 12345678910P1 001 - 099 (Regular Memory Channel)
P1L - P9U (PMS)
501 - 510 (5 MHz, U.S. and U.K. version only)
EMG (Emergency)
P2 VFO-B Frequency (Hz)
P3 Clarier Direction +: Plus Shift, -: Minus Shift
Clarier Offset: 0000 - 9999 (Hz)
P4 0: CLAR “OFF” 1: CLAR “ON”
P5 0:
(Fixed)
P6 MODE 1: SSB (SSB BFO) 2: SSB (SSB BFO) 3: CW 4: FM 5: AM
6: RTTY (RTTY BFO) 7: CW (CW BFO) 8: DATA (DATA BFO)
9: RTTY (RTTY BFO) A: - B: FM-N C: DATA (DATA BFO)
D: AM-N
P7 0: VFO 1: Memory 2: Memory Tune 3: Quick Memory Bank (QMB)
4: QMB-MT 5: PMS 6: HOME
P8 0: CTCSS “OFF” 1: CTCSS ENC/DEC 2: CTCSS ENC
P9 00:
(Fixed)
P10 0: Simplex 1: Plus Shift 2: Minus Shift
Read 12345678910
O I ;
Answer
12345678910
O I P1 P1 P1 P2 P2 P2 P2 P2
11 12 13 14 15 16 17 18 19 20
P2 P2 P2 P2 +/- P3 P3 P3 P3 P4
21 22 23 24 25 26 27 28 29 30
P5 P6 P7 P8 P9 P9 P10 ;
OS OFFSET (REPEATER SHIFT)
Set 12345678910P1 0:
(Fixed)
P2 0: Simplex
1: Plus Shift
2: Minus Shift
*: This command can be activated only with an FM mode.
O S P1 P2 ;
Read 12345678910
O S P1 ;
Answer 12345678910
O S P1 P2 ;
PA PRE-AMP (IPO)
Set 12345678910P1 0:(Fixed)
P2 0: IPO
1: AMP
P A P1 P2 ;
Read 12345678910
P A P1 ;
Answer 12345678910
P A P1 P2 ;
PB PLAY BACK
Set 12345678910P1 0: DVS P2 0: DVS (Playback Stop)
1: DVS (CH “1” Playback Start)
2: DVS (CH “2” Playback Start)
3: DVS (CH “3” Playback Start)
4: DVS (CH “4” Playback Start)
5: DVS (CH “5” Playback Start)
P B P1 P2 ;
Read 12345678910
P B P1 ;
Answer 12345678910
P B P1 P2 ;
PC POWER CONTROL
Set 12345678910P1 005 -100
P C P1 P1 P1 ;
Read 12345678910
P C ;
Answer 12345678910
P C P1 P1 P1 ;
PL SPEECH PROCESSOR LEVEL
Set 12345678910P1 000 -100
P L P1 P1 P1 ;
Read 12345678910
P L ;
Answer 12345678910
P L P1 P1 P1 ;
PR SPEECH PROCESSOR
Set 12345678910P1 0: Speech Processor
1: Parametric Microphone Equalizer
P2 0: “OFF”
1: “ON”
P R P1 P2 ;
Read 12345678910
P R P1 ;
Answer 12345678910
P R P1 P2 ;

FT-891 CAT Operation Reference Book
15
CAT (Computer Aided Transceiver)Operation
PS POWER SWITCH
Set 12345678910P1 0: POWER “OFF”
1: POWER “ON”
This command requires dummy data be initially sent. Then after one second and be-
fore two seconds the command is sent.
P S P1 ;
Read 12345678910
P S ;
Answer 12345678910
P S P1 ;
QI QMB STORE
Set 12345678910
Q I ;
Read 12345678910
Answer 12345678910
QR QMB RECALL
Set 12345678910
Q R ;
Read 12345678910
Answer 12345678910
QS QUICK SPLIT
Set 12345678910
Q S ;
Read 12345678910
Answer 12345678910
RA RF ATTENUATOR
Set 12345678910P1 0:
(Fixed)
P2 0: OFF
1: ON
R A P1 P2 ;
Read 12345678910
R A P1 ;
Answer 12345678910
R A P1 P2 ;
RC CLAR CLEAR
Set 12345678910
R C ;
Read 12345678910
Answer 12345678910
RD CLAR DOWN
Set 12345678910P1 0000 - 9999 (Hz)
R D P1 P1 P1 P1 ;
Read 12345678910
Answer 12345678910
RG RF GAIN
Set 12345678910P1 0:
(Fixed)
P2 000 - 030
R G P1 P2 P2 P2 ;
Read 12345678910
R G P1 ;
Answer 12345678910
R G P1 P2 P2 P2 ;

FT-891 CAT Operation Reference Book
16
CAT (Computer Aided Transceiver)Operation
RI RADIO INFORMATION
Set 12345678910P1 0: Hi-SWR 3: REC 4: PLAY
A: TX LED B: RX LED
P2 0: OFF
1: ON
Read 12345678910
R I P1 ;
Answer 12345678910
R I P1 P2 ;
RL NOISE REDUCTION LEVEL
Set 12345678910P1 0:
(Fixed)
P2 01 - 15
R L P1 P2 P2 ;
Read 12345678910
R L P1 ;
Answer 12345678910
R L P1 P2 P2 ;
RM READ METER
Set 12345678910P1 0: Depends on the front panel METER 4: ALC
1: S 5: PO
2: Depends on the front panel METER 6: SWR
(PO / COMP / ALC / SWR / ID) 7: ID
3: COMP
P2 0 - 255
Read 12345678910
R M P1 ;
Answer 12345678910
R M P1 P2 P2 P2 ;
RS RADIO STATUS
Set 12345678910P1 0: NORMAL MODE
1: MENU MODE
Read 12345678910
R S ;
Answer 12345678910
R S P1 ;
RU RX CLARIFIER PLUS OFFSET
Set 12345678910P1 0000 - 9999 (Hz)
R U P1 P1 P1 P1 ;
Read 12345678910
Answer 12345678910
SC SCAN
Set 12345678910P1 0: Scan “OFF”
1: Scan “ON” (UP ward)
2: Scan “ON” (DOWN ward)
S C P1 ;
Read 12345678910
S C ;
Answer 12345678910
S C P1 ;
SD CW BREAK-IN DELAY TIME
Set 12345678910P1 0030 - 3000 msec
S D P1 P1 P1 P1 ;
Read 12345678910
S D ;
Answer 12345678910
S D P1 P1 P1 P1 ;
SH WIDTH
Set 12345678910P1 0:
(Fixed)
P2 0: OFF
1: ON
P3 00
(See Table below)
S H P1 P2 P3 P3 ;
Read 12345678910
S H P1 ;
Answer 12345678910
S H P1 P2 P3 P3 ;

FT-891 CAT Operation Reference Book
17
CAT (Computer Aided Transceiver)Operation
Command Bandwidth
P3 SSB (Narrow) SSB (Wide) CW (Narrow) CW (Wide) RTTY/PSK (Narrow) RTTY/PSK (Wide)
00 (Default) 1500 Hz 2400 Hz 500 Hz 2400 Hz 300 Hz 500 Hz
01 200 Hz - 50 Hz - 50 Hz -
02 400 Hz - 100 Hz - 100 Hz -
03 600 Hz - 150 Hz - 150 Hz -
04 850 Hz - 200 Hz - 200 Hz -
05 1100 Hz - 250 Hz - 250 Hz -
06 1350 Hz - 300 Hz - 300 Hz -
07 1500 Hz - 350 Hz - 350 Hz -
08 1650 Hz - 400 Hz - 400 Hz -
09 1800 Hz 1800 Hz 450 Hz - 450 Hz -
10 - 1950 Hz 500 Hz 500 Hz 500 Hz 500 Hz
11 - 2100 Hz - 800 Hz - 800 Hz
12 - 2200 Hz - 1200 Hz - 1200 Hz
13 - 2300 Hz - 1400 Hz - 1400 Hz
14 - 2400 Hz - 1700 Hz - 1700 Hz
15 - 2500 Hz - 2000 Hz - 2000 Hz
16 - 2600 Hz - 2400 Hz - 2400 Hz
17 - 2700 Hz - 3000 Hz - 3000 Hz
18 - 2800 Hz - - - -
19 - 2900 Hz - - - -
20 - 3000 Hz - - - -
21 - 3200 Hz - - - -
SM S-METER READING
Set 12345678910P1 0:
(Fixed)
P2 000 - 255
Read 12345678910
S M P1 ;
Answer 12345678910
S M P1 P2 P2 P2 ;
SQ SQUELCLH LEVEL
Set 12345678910P1 0:
(Fixed)
P2 000 - 100
S Q P1 P2 P2 P2 ;
Read 12345678910
S Q P1 ;
Answer 12345678910
S Q P1 P2 P2 P2 ;
ST SPLIT
Set 12345678910P1 0: SPLIT “OFF”
1: SPLIT “ON”
2: SPLIT “ON” + 5 kHz up
S Q P1 ;
Read 12345678910
S Q ;
Answer 12345678910
S Q P1 ;
SV SWAP VFO
Set 12345678910
S V ;
Read 12345678910
Answer 12345678910
TS TXW
Set 12345678910P1 0: TXW “OFF”
1: TXW “ON”
T S P1 ;
Read 12345678910
T S ;
Answer 12345678910
T S P1 ;
TX TX SET

FT-891 CAT Operation Reference Book
18
CAT (Computer Aided Transceiver)Operation
Set 12345678910P1 0: RADIO TX “OFF” CAT TX “OFF”
1: RADIO TX “OFF” CAT TX “ON”
2: RADIO TX “ON” CAT TX “OFF” (Answer)
T X P1 ;
Read 12345678910
T X ;
Answer 12345678910
T X P1 ;
UL PLL UNLOCK STATUS
Set 12345678910P1 0: PLL “Lock”
1: PLL “Unlock”
Read 12345678910
U L ;
Answer 12345678910
U L P1 ;
UP UP
Set 12345678910
U P ;
Read 12345678910
Answer 12345678910
VD VOX DELAY TIME
Set 12345678910P1 0030 - 3000 msec (10 msec multiples)
V D P1 P1 P1 P1 ;
Read 12345678910
V D ;
Answer 12345678910
V D P1 P1 P1 P1 ;
VG VOX GAIN
Set 12345678910P1 000 - 100
V G P1 P1 P1 ;
Read 12345678910
V G ;
Answer 12345678910
V G P1 P1 P1 ;
VM VFO-A TO MEMORY CHANNEL
Set 12345678910
V M ; ;
Read 12345678910
Answer 12345678910
VX VOX STATUS
Set 12345678910P1 0: VOX “OFF”
1: VOX “ON”
V X P1 ; ;
Read 12345678910
V X ;
Answer 12345678910
V X P1 ;
ZI ZERO IN
Set 12345678910(CW AUTO ZERO IN Function)
Z I ; ;
Read 12345678910
Answer 12345678910

1710-B
Copyright 2017
YAESU MUSEN CO., LTD.
All rights reserved.
No portion of this manual may be
reproduced without the permission of
YAESU MUSEN CO., LTD.
YAESU MUSEN CO., LTD.
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