FT-920 Operating Manual
54
Split VFO Operation
Some pile-ups (especially on SSB) involve a split
greater than ±9.99 kHz. In these cases, use the two
VFOs on the FT-920 for split frequency operation.
Example:
DX1DX is on 7.095.0 MHz, listening “210 to 220”
(7.210 ~ 7.220 MHz) for replies:
With the Clarifier(s) off, and TX/RX control on
the Main Tuning Dial, tune in DX1DX on
7.095.0 MHz.
Press and hold in the [A B] key for ½ sec-
ond, then rotate the VFO-B Tuning Dial to set
VFO-B somewhere between 7.210 and 7.220
MHz (pressing [A B] ensures that both VFOs
are on the same operating mode).
Press the VFO-B [TX] indicator, which will glow
Orange after you press it. This indicates that
VFO-A is in charge of the receive frequency,
while VFO-B is controlling the transmit fre-
quency.
In the same manner as you did in the TX C
LAR
example previously, you may press the VFO-
B [RX] indicator so as to listen to the pile-up. If
you find the station being worked by DX1DX,
tune quickly onto that station’s frequency, then
press the VFO-A [RX] indicator to return re-
ceive frequency control to VFO-A, so you can
listen for DX1DX to say “QRZ?”
?
When operating Split via any means, in pile-up
situations be absolutely certain not to press the
VFO-A [TX] indicator accidentally, as this will make
you transmit on the DX station’s frequency, caus-
ing interference to others trying to work the DX.
Quick Split Feature
A user-programmed “Quick Split” may be utilized to
provide a starting point for split operation. For ex-
ample, if many of your DX pile-up operating situa-
tions require you to transmit 5 kHz higher than you
are receiving, this feature may be useful to you. Here
is the procedure for activating Quick Split:
Press the [M
ENU
] key to enter the Menu mode.
Rotate the VFO-B Tuning Dial so as to select
Menu Item U-04.
Press the [E
NT
] key to enter the Menu Com-
mand mode.
Now rotate the VFO-B Tuning Dial to select
“5.0” (kHz) or whatever T
X
/R
X
split you desire.
Press the [M
ENU
] key once more to exit the
Menu mode.
While operating with both T
X
and R
X
control
from VFO-A, press the [A
u
B] key. You will
observe that T
X
control has been shifted to
VFO-B, and that VFO-B’s frequency is 5 kHz
higher than VFO-A’s.
To
cancel Quick Split, repeat the first four steps
above; in step
, rotate the VFO-B Tuning Dial
to “O
FF
” then press [M
ENU
] to exit the Menu
mode and resume normal operation.
Mode K Satellite Operation
Although the FT-920 is not designed for full duplex
satellite operation, Mode K satellite operation (uplink
on 21.2 MHz, downlink on 29.4 MHz) is nonetheless
possible, particularly on CW. Here is a generalized
example of such an operating scenario; consult one
of the many satellite operating journals for precise
frequency information:
Set VFO-A to 29.430 MHz, CW mode, and dis-
able (temporarily, at least) the Narrow filter, if
currently on. Be sure that the VFO-A [RX] indi-
cator is illuminated.
Set VFO-B to 21.230 kHz, CW mode. Press
the VFO-B [TX] key so that the switch/LED
glows Orange.
If you are using a typical triband or log-peri-
odic antenna which covers both 15 and 10
meters, set up the two VFOs for operation on
the same antenna. If you are using separate
antennas on the two bands, connect the 15
meter antenna to antenna port B, and select
Antenna B for VFO-B; now connect the 10
meter antenna to antenna port A, and select
antenna A for VFO-A.
Press the [B
K
-I
N
] switch to activate full CW
break-in operation.
If the appropriate satellite is above the hori-
zon, and the frequency is clear, you may now
send a string of dots to allow you to find your
downlink signal through the satellite. Because
the break-in system allows you to listen be-
tween dots, the propagation delay through the
satellite should allow you to hear traces of your
signal, and you may adjust the appropriate
VFO for the exact pitch desired, a well as to
follow Doppler shift.
Make a note of the TX/RX frequency differ-
p
Summary of Contents for FT-920
Page 7: ...FT 920 Operating Manual 5...
Page 9: ...FT 920 Operating Manual 7...
