Changing Frequency - Up / Down Keys & [Dial]; Changing Frequency Step (Program) - AOR AR2700 Operating Manual

6-5 Changing frequency using the [UP] [DOWN] keys and [DIAL]
The UP / DOWN keys provide a convenient method of frequency change,
alternatively the [DIAL] may be rotated.
The speed at which the receiver steps up or down depends upon the STEP
SIZE which is default to PROG (automatically set from the lookup table). It is
possible to override the PROGRAM default using the [STEP] key. Available
step sizes are:
NFM & AM: 5kHz, 6.25kHz, 9kHz, 10kHz, 12.5kHz, 20kHz, 25kHz,
30kHz, 50kHz & 100kHz.
WFM: 50kHz & 100kHz.
If the STEP SIZE / MODE is set to PROGRAM, the mode and channel step will
automatically change as you tune through the various amateur, broadcast and
utility bands.
The [DIAL] method of frequency selection is the most traditional approach to
locating signals particularly on the short wave and medium wave bands. It
provides an easy method to locate new or previously unknown frequencies or
to check activity within certain frequency bands such as amateur or shortwave
broadcast. The rotary tuning [DIAL] provides the very best "user interface"
with the AR2700.
Rotating the [DIAL] clockwise increases frequency while rotation
anti-clockwise decreases receive frequency. Being a mechanical device, it is
not unusual for the [DIAL] to miss
occasional tuning increments when
rotating.
Should you press and hold either the
[UP] or [DOWN] key for more than 1.5
seconds while the squelch is closed, the
receiver will begin to MANUALLY
SEARCH from the displayed frequency
looking for active frequencies. Press
[MANU] to cancel the process.
6-6 Changing frequency STEP size (PROGRAM)
The specification for channel occupancy, step (separation) and mode are
decided by and allocated by departments of Government following
International discussions.
Not surprisingly the allocation of frequency bands are not the same all over the
world and channel separation (step) varies from band to band. As an example
the channel separation (step) for the medium wave band in Europe is 9 kHz
while in the U.S.A. it is 10 kHz.
For the above reasons it is necessary to alter the STEP size according to local