Split Frequency Operation HF FT991 Examples

KI5JUF Starts: KI5JUF says listening up 10-15 kHz, my TX frequency will stay the same on VFO-B and I will scan VFO-A for stations.
1. QSO is on 28.400 MHz initial location of the pile up.
2. I will say “This is KI5JUF calling CQ10M, CQ10M listening up 10 - 15 kHz”
3. I will rotate the Main VFO-A knob for RX frequency between 28.410 - 28.415 MHz’s
4. I will press the “A/B” button, then rotate I will rotate the Main VFO-A knob to the original TX frequency of 28.400 MHz’s.
5. I will press the “A/B” button again, then press, then press “SPLIT” button. The original transmit frequency is shown in VFO-B in the lower TFT display the LED indicators will show as below: Press the “F/M-LIST” tap “SWEEP) align the T and R waterfall.

a. VFO-A RX Indicator “ON” (LED glows green) upper display 28.410 MHz’s.
b. VFO-A TX Indicator “OFF” (LED off)
c. VFO-B RX Indicator “OFF” (LED off)
d. VFO-B TX Indicator “ON” (LED glows red) lower display 28.400 MHz’s.

6. I will adjust the Main VFO-A knob to scan for stations between 28.410 - 28.415 MHz’s.
7. I will only transmit on 28.400 MHz’s using VFO-B.
8. To listen and check for traffic on the TX frequency 28.400 MHz, press the “TWX”
9. If I hear the other station on my VFO-A will stop adjusting VFO-A and start QSO.
10. To cancel press “SPLIT” this will close VFO-B, return to VFO-A only.


KI5JUF Joins: other station says listening up 10-15 kHz, my TX frequency will be adjusted on VFO-B and my receive on VFO-A will not change
1. QSO is on 28.400 MHz initial location of the pile up.
2. The other station announces “This is AB1EF calling CQ10M, CQ10M listening up 10 - 15 kHz”
3. I will press the “SPLIT” button. The VFO-B frequency will be shown in the lower TFT display and the LED indicators will show as below: Press the “F/M-LIST” tap “SWEEP) align the T and R waterfall.

a. VFO-A RX Indicator “ON” (LED glows green) upper display 28.400 MHz’s.
b. VFO-A TX Indicator “OFF” (LED off)
c. VFO-B RX Indicator “OFF” (LED off)
d. VFO-B TX Indicator “ON” (LED glows red) lower display 28.410 MHz’s.

4. I will adjust VFO-B to the transmit range of 28.410 - 28.415 MHz’s where the other station is listening up.
5. If I hear the other station on my VFO-A will stop adjusting VFO-B and start QSO.
6. To cancel press “SPLIT” this will close VFO-B, return to VFO-A only.