Yaesu FT-990       ! Radio Model Number for display - Revised 04/03/93 N3EQF
M                  ! Update rate in seconds or (M) manual update or (N) none
                   ! Acknowledge command, if required (leave blank if not)
0                  ! Bytes to receive from radio as ECHO or OK block
                   ! Pacing or Initialize command, if required
H                  ! Hexadecimal (H) or String (S) instruction data type
R                  ! Commands sent to radio Forward (F) or Reverse (R) order
                   ! -------------- FREQUENCY READ -------------------------
1000000000         ! Command to receive operating FREQUENCY from radio
25                 ! Number of bytes required from radio after FREQ command
6                  ! Starting byte position for FREQUENCY value
3                  ! Number of bytes in FREQUENCY value
F                  ! Frequency decoded in Forward (F) or Reverse (R) order
W,10               ! BCD (B) or Weighted Binary (W followed by scale factor)
                   ! -------------- MODE READ ------------------------------
1000000000         ! Command to receive operating MODE from radio
25                 ! Number of bytes required (we don't need all those bytes!)
12                 ! Starting byte position for MODE value
1                  ! Number of bytes in MODE value
                   ! Bit mask for MODE value, if required
2                  ! Value for CW
0                  ! Value for LSB
1                  ! Value for USB
4                  ! Value for FM
3                  ! Value for AM
5                  ! Value for FSK
                   ! -------------- FREQUENCY SET --------------------------
0A00000000         ! Command to set the operating FREQUENCY
2                  ! Starting byte position for FREQUENCY value
4                  ! Number of bytes in FREQUENCY value
                   ! -------------- MODE SET -------------------------------
0C00000000         ! Command to set the operating MODE
2                  ! Starting byte position for MODE value
1                  ! Number of bytes in MODE value
2                  ! Value for CW
0                  ! Value for LSB
1                  ! Value for USB
6                  ! Value for FM
4                  ! Value for AM
8                  ! Value for FSK