Vfo Tuning Dial; Shuttle Jog (Vfo-A); Front Panel Up/Down Switches; Mh-31B8 Hand Micu P /Dwn /Fst Switches - Yaesu FT-920 Operating Manual

VFO Tuning Dial

Rotating either VFO Tuning Dial tunes the transceiver
according to the selected tuning step size. Due to the
extremely fine steps synthesized by the Direct Digital
Synthesis (DDS) circuitry, the tuning action is as
smooth as though an analog tuning VFO were being
used.
By pushing the [S ] key, the tuning rate may be
TEP
modified. The [S ] key toggles between three set-
TEP
ÞN ÞF
tings: F
INE ORMAL AST
The steps available in each mode are shown below.
MODE
NO RMAL
SSB, CW, D ATA (SS B) 10Hz
AM, F M, D ATA(FM) 100Hz
The [S ] switch affects the action of the VFO-A
TEP
and VFO-B tuning dials, as well as the front panel
and microphone [U ] and [D
P
Finally, the number of tuning steps per revolution of
the tuning dials may be changed via Menu Item U-
01; see page 73 for details.

Shuttle Jog (VFO-A)

The Shuttle Jog is an efficient way to achieve large
frequency excursions, avoiding the need to spin the
VFO-A tuning dial to move quickly from one frequency
to another.
Basically, the Shuttle Jog is a spring-loaded ring used
for frequency change. Rotating the Shuttle Jog ring
away from its center detent in either direction will ini-
tiate tuning. The farther the Shuttle Jog ring is moved
from the center, the larger and faster the amount of
frequency change which results (minimum steps with
slight rotation of the Shuttle Jog ring are 10 Hz).
Front Panel U /D Switches
P OWN
These switches may also be used for quick frequency
excursions from one end of a band to another. In the
"Normal" position of the [S
one touch of the [U ] switch will cause the frequency
P
to jump upward by 100 kHz.
T h e f r e q u e n c y
STEP SWITCH POSITION
jumps available are
NORMAL
100k Hz
shown at the right.
FT-920 Operating Manual
ÞF
. . .
INE
ST EP Switch
FAST FINE
100Hz 1Hz
1kHz 10Hz
] switches.
OWN
] switch, for example,
TEP
FAST FINE
1MHz 10kHz
MH-31B8 Hand Mic U /D
P WN
Pushing the MH-31B8's U
P
tuning in an upward or downward direction, in fre-
quency steps set in accordance with the selection
made via the [S ] switch. Pushing the [F
TEP
switch tuning into the "Fast" mode, as though the front
panel [S ] switch had been set to "Fast." See the
TEP
table below for a summary of the steps available in
these modes of operation.
MOD E U P
SSB, CW,
{ |
10Hz
DATA(SS B)
AM , FM ,
{ |
100Hz
DATA( FM)

MD-100A8X Desk Microphone Rotary Scanning Switch

The (optional) MD-100A8X Desk Microphone fea-
tures a Rotary Scanning Switch at the base of the
microphone support stand. Rotating this switch to the
left causes the frequency to scan lower, and rotating
the switch to the right causes the frequency to scan
higher. Rotating this switch fully to the left or right
causes the scanning speed to switch to the "Fast"
mode, as though you had pushed the [F
the MH-31B8.
See the table below for a summary of the steps avail-
able in these modes of operation.
MOD E R ight
SSB, CW,
{ |
10Hz
DATA(SS B)
AM , FM ,
{ |
100Hz
DATA( FM)
L Switches
OCK
To guard against accidental changes in the settings
of the Tuning Dials and/or the Shuttle Jog dial, use
the Lock functions provided on the front panel.
The L switches to the lower right of the VFO-A
OCK
and VFO-B Tuning Dials have slightly different ef-
fects, depending on how each switch is pressed.
These switches may be used in combination to pro-
vide the desired locking control, as shown below.
L (A) Sw itch
OCK
VFO -A Tuning Di al
< 0 .5 sec
and S huttle Jog
> 0 .5 sec
None
/F Switches
ST
or D switch will initiate
WN
] key will
ST
FST FST
D WN + +
U P D WN
{ |
10Hz 100Hz 100Hz
{ |
100Hz 1kHz 1kHz
] switch on
ST
Fully Fully
Left
R ight Left
{ |
10Hz 100Hz 100Hz
{ |
100Hz 1kHz 1kHz
L (B) Sw itc h
OCK
VFO -B Tuning Di al
Al l Switc hes
exp. POW ER, MOX , VOX
Switc hes
39