Downloading Ft-920 Data - Yaesu FT-920 Operating Manual

Downloading FT-920 Data

On command, the FT-920 will download some or all
of its operational data. By regular polling of the trans-
ceiver, your software can be kept continuously up-
dated on the status of the FT-920 operating environ-
ment.
The following commands cause the FT-920 to down-
load various components of its operational status:
Status Update (10H): this Opcode causes the
transceiver to download frequency and memory
channel data, per the parameter data supplied in
the Status Update request (parameters P1 & P4).
Status Flags Request (FAH): this Opcode in-
structs the transceiver to download eight status
flag bytes.
Read Meter (F7H): this Opcode causes the trans-
ceiver to download meter deflection data in packs,
pursuant to Note 12 following the "Opcode Com-
mand Chart on page 86.
Pacing (0EH): this Opcode sets the delay between
bytes of data when you request a download of
data. This delay is set to zero initially, but reset-
ting it to a higher value will allow slower comput-
ers to read and process data returned by the ra-
dio. However, the download time will be signifi-
cantly increased if a high value is used in this
command's "P1" argument.
Bit O ffse t S tat us Fla g Byte #0 Conte nt s
0 Split Operatio n active with VFO-B on TX
1 Split Operation active with VFO-B on RX
2 Antenna Tun er On/tuning
3 System ope ration in progres s
4 VFO-B In Us e (both TX and RX on VFO-B)
5 Direc t Keypa d Entry in progress
6 VFO-A is Mu ted
7 Tran smission in progress (PTT line g rounded )
Bit O ffse t S tat us Fla g Byte #3 Conte nt s
0 Not Used
1 Alph a-Numeric Memo ry Lavel selecte d
2 Not Used
3 Linear Amplifier Tuni ng Pulser active
4 PTT grounded via
5 Transmit "Inh ibit" is active
6 Key Release Timer ac tve
7 PTT inhibit
Bit O ffse t S tat us Fla g Byte #6 Conte nt s
0 Dual Watch active
1 Not Used
2 Quic k Menu Mode ac tive
3 BUS Y lamp is on
4 Fine Tuning active
5 Not Used
6 VFO -B Tx Mu te activ e
7 VFO -A Tx Mu te activ e
FT-920 Operating Manual
8-Byte Status Flags Record Table
Bit O ffse t S tat us Fla g Byte #1 Conte nt s
0 5-sec ond "Memory Ch eck" countdown in progress
1
2
3 Quic k Memo ry Bank (QMB) s elected
4
5
6
7 General Cov erage Reception active
Bit O ffse t S tat us Fla g Byte #4 Conte nt s
0
1
2 All Front Pan el Controls locke d
3
command 4
5
6
7
Bit O ffse t S tat us Fla g Byte #7 Conte nt s
0
1
2
3
4
5 Linear Amplifier Tuning Pulse being transmitte d
6 DTMF T one are being transmitted
7
These Opcodes are detailed below.
Status Update (10H)
Depending on the value of parameter P1, this com-
mand will return:
• One byte containing the current Memory
Channel Number (P1=01);
• Two 14-byte records of the current operating
frequency (VFO or Memory; P1-02);
• One each 14-byte record for VFO-A and VFO-
B (P1=03); or
• One 14-byte record of Memory Channel data
(P1=04).
When P1 is set to value 04, parameter P4 may be
set to a hexadecimal value between 00 and 89 to
prompt the transceiver to download frequency infor-
mation on any of the memories, as shown in Note 7
on previous page. So P1=04 instructs the radio to
download memory data, and P4's value defines which
memory channel's data is to be downloaded.
The format for the 14-byte frequency data records is
shown at the end of this sub-section.
Status Flags Request (FAH)
The format for the eight Status Flags is shown be-
low:
Bit O ffse t
Memory Checking in progres s
Dual VFO Tracking active
Memory Tuning in progress
VFO Operatio n selec ted
Memory Mod e selecte d
Bit O ffse t
RTTY space (TX Idle )
Not Used
Group Memory Mode active
Antenna B s elected
Rx A ntenna selected
Not Used
Not Used
Not Used
Menu Setting in progress
CTCSS/Tone Burst active
Not Used
Not Used
VOX is active
S tat us Fla g Byte #2 Conte nt s
0 Fast Tuning is active
1 Antenna Tuner is in-line
2 VFO-B is loc ked
3 VFO-A is loc ked
4 Squelch is c losed
5 Up s canning is active
6 Sca nning is paused
7 Scanning is active
S tat us Fla g Byte #5 Conte nt s
0 VFO-A is mu ted
1 VFO-B is mu ted
2 Not Used
3 Tx activated via Spot switch comman d
4 Not Used
5 Not Used
6 Ante nna Tuner's Wait light is on
7 High SWR detected
89