Yaesu FT-250R, Руководство пользователя

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FT-250R O
PERATING
M
ANUAL
10
VFO S
PLIT
M
ODE
For working on repeaters with odd splits, or communicating with astronauts on orbiting
space vehicles, it may be necessary to use non-standard splits between the receive and
transmit frequency. If the application is infrequent enough not to warrant the dedication of
a memory channel for this purpose, the “VFO Split” mode may be used. Here is the proce-
dure:
c
Press the [ VFO
(
PRI
)] key, as needed, to select VFO-A. Set VFO-A for the receiving
frequency (for example, 144.950 MHz).
d
Now press the [ VFO
(
PRI
)] key, and set VFO-B for the desired transmit frequency
(e.g. 144.750 MHz).
e
Press the [ VFO
(
PRI
)] key once more to re-establish VFO-A as the “Main” (receive)
VFO.
f
Press the [ F/L
] key, then press the [
0
(
SET
)] key, to enter the Set mode.
g
Rotate the
DIAL
to select Menu #5 (“
V-SPLIT V-SPLIT V-SPLIT V-SPLIT V-SPLIT
”).
h
Press the [ F/L
] key, then rotate the
DIAL to set this function ON.
i
Press the
PTT
key once to save the new setting and exit to normal operation.
j
You will now be operating in a Split mode. When you press the PTT key to transmit,
you will observe that VFO-A and VFO-B will reverse positions.The VFO selection
indicator “
b bb
bb
” will blinks while the transceiver is transmitting, this means that the VFO
Split feature is now activated.
k
If you need to modify the VFO-B (transmit) frequency (for Doppler Shift correction,
etc.), just press the [
VFO
(
PRI
)] key, then make the necessary change, then press
[
VFO
(
PRI
)] key once more to restore VFO-A to the “receive VFO” position.
l
When you have finished with Split operation, re-enter the Set mode, and set Menu #5
to OFF.
A split frequency pair set up via the VFO Split feature cannot be stored directly into
memory. You can, however, store odd frequency pairs using a different (slightly simpler)
procedure. See page 18.
R
ECEIVE
B
ATTERY
S
AVER
S
ETUP
An important feature of the FT-250R is its Receive Battery Saver, which “puts the radio
to sleep” for a time interval, periodically “waking it up” to check for activity. If somebody
is talking on the channel, the
FT-250R will remain in the “active” mode, then resume its
“sleep” cycles. This feature significantly reduces quiescent battery drain, and you may
change the amount of “sleep” time between activity checks using the Menu System:
c
Press the [ F/L
] key, then press the [
0
(
SET
)] key to enter the Set mode.
d
Rotate the DIAL to select Menu Item #9 (“
RX SAVE RX SAVE
RX SAVE RX SAVE
RX SAVE
”).
e
Press the [ F/L
] key to enable adjustment of this Menu item.
Advanced Operation