Kenwood TM-255E - Manual (Page 24)

4 COMMUNICATION
DUAL DIGITAL VFOs
The A and B VFOs function independently so that
different or the same frequencies can be selected by
each VFO. Use the following buttons to select or to
copy the frequency data from one VFO to the other.
■ Selecting VFOs
Press [A/B] to toggle between VFO A and VFO B.
1 Assume that you are presently using VFO A.
c
A VFO
O zi O Zi n n n
\
FM
V
1 J J. c
S 1 3 5 7 9 ^
2 4 6 8
LI
40dB
10
LLU
J
2 Press [A/B].
3 VFO B is selected and the frequency currently
selected by VFO B is displayed.
4 Press [A/B] again to toggle back to VFO A.
Equalizing VFO Frequencies
Press this button to transfer the frequency and
modulation mode of the active VFO to the inactive
VFO.
1 Assume that you are presently using VFO A.
f
A VFO
U zi O zi n n
ri FM
V
1 J J, c
S 1 3 5 7 9 “
2 4 6 6
LI
40dB
10
LL LI
)
2 Press [A/B].
3 VFO B is selected and the frequency currently
selected by VFO B is displayed.
/----------
VFO B
\
O ZI o n c n n
1 J CL LI J LL LI
S 1 3 5 9 “ 40dB C \ N
V 2 4 6 6 10 J
4 Press [CLR].
5 Press [A/B] again.
• This selects VFO A again. Note that the
VFO B frequency and the modulation mode
have been copied to VFO A due to Step 4.
FREQUENCY SELECTION
Turn the Main Tuning control clockwise to raise the
operating frequency and counterclockwise to lower
the frequency.
■ Alternate Tuning Control
Use the Alternate Tuning control to change the
frequency using larger steps than the Main Tuning
control. Turn this control clockwise to raise the
frequency and counterclockwise to lower the
frequency. The step size of the Alternate Tuning
control is changed via Menu Setup as explained
below.
■ Microphone Keys
You can also use [UP] or [OWN] on the
microphone to change the frequency. Each press
of [UP] or [OWN] raises or lowers the frequency
1 step from the current frequency.
FREQUENCY STEP SIZE
■ Main Tuning Control
The frequency step size automatically varies
depending on how fast the Main Tuning control is
turned due to "fuzzy logic". As the control is turned
more quickly, the frequency step increases through
the range of 5 Hz to 200 Hz. In the FM mode, the
range is from 50 Hz to 2 kHz.
■ Alternate Tuning Control
The frequency step size is selected via Menu A,
No. 06 for SSB and CW modes {page 13}. Use
Menu A, No. 07 for FM mode. There are 5 steps
available for SSB/CW and 8 steps for FM. These
menu selections also affect the step size when
using microphone [UP]/[DWN].
Version
FM Mode (kHz) SSB/CW Mode (kHz)
TM-255 TM-455 TM-255/455
Canada
U.S.A.
5 25 10
Europe
General
12.5 25 10
MHz Button
1 Press [MHz] if you want to change the
frequency in 1 MHz steps.
• "MHz" appears.
• Turning the Alternate Tuning control or
pressing microphone [UP]/[DWN] causes
the frequency to change in 1 MHz steps.
2 Press [MHz] again to switch OFF the MHz
function when you want to revert back to the
previous step size.
17