Icom IC-211 Instruction Manual page 12

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SSB and CW mode, the frequency is changed in 100Hz steps which correspond to the.
smaller vernier marks on the knob. The larger marks represent 1KHz steps. One com-
plete rotation of the tuning knob results іп a 5K Hz frequency increase or decrease іп
100Hz steps exactly as shown by the small vernier marks.
In the FM mode and between 146 to 148MHz, the frequency is changed in 5KHz steps.
When tuning up past 147.995.0MHz, the frequency will automatically revert to 144.000.0
MHz. Likewise, when tuningdown past 144.000.0MHz, the frequency will automatically
revert to 147.995MHz. On the rear of the Tuning Shaft is a large flywheel to keep
tuning smooth and stable. There is a soft brake pad that rides on the flywheel to give
"feel" to the tuning knob. However, when the knob is spun fast, the brake releases and
allows tuning through a large portion of the frequency band. As the knob slows, the
brake is again activated.
TUNING SPEED BUTTON
Between 144.000.0MHz to 145.999.9MHz in the SSB and CW modes, pushing the
tuning speed button, while rotating the tuning knob will result in changing the fre-
quency in 5KHz steps. This will allow faster tuning through the lower band. Pressing
the button during tuning from 146 ~ 147.995MHz has no effect as the frequency is
already changing in 5KHz steps.
To calibrate the tuning knob with the frequency, tune to a frequency in the 144 — 146
MHz band, release the tuning speed button, if pushed, and align one of the long vernier
lines around the tuning knob with the center indicator at the top. Press the tuning speed
button to clear the 1KHz and 100Hz digits of the frequency display and the knob is
now calibrated.
DIAL LOCK BUTTON
After the 1С-211 is set to a certain frequency for rag chewing, mobile operation, etc.,
pushing the DIAL LOCK BUTTON will illuminate the DIAL LOCK indicator LED and
the VFO is electronically locked at the displayed frequency, thus inactivating the
operation of the tuning knob. To change frequency, the dial lock must first be disen-
gaged by pushing the dial lock button again. The dial lock indicator LED will go OFF
and the frequency will change with the direction of the tuning knob rotation. Turning
the power OFF will release the dial lock and clear the displayed frequency.
FREQUENCY DISPLAY
The frequency of the IC-211 is displayed on 7 segment LEDs. Since the 1MHz and 1K Hz
decimal points are displayed, the frequency can easily be read. The frequency indicated
is the carrier frequency of each mode. Since the local oscillation frequency is shifted
in accordance with modes, no tuning will be required if you change modes: Remember,
if you turn the RIT control ON to change the receive frequency and rotate the RIT
control knob, the frequency displayed will not change.
RECEIVE INDICATOR
When in the receive mode, the receive LED will be continuously lit in either USB, LSB,
or CW modes, but lit only when a signal breaks the squelch in the FM mode.
DIAL LOCK INDICATOR |
llluminates when the DIAL LOCK BUTTON is pressed to lock the dial.
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