AR2700 operating manual
30
bandplan conventions. The AR2700 has been pre-programmed at the factory
with all the bandplan data (specific to each market area) so that the AR2700
will automatically select the appropriate step size and mode for the frequency
chosen. This greatly simplifies operation of the receiver while you are
familiarising yourself with all the facilities.
The pre-programming of step size may be manually overridden so you may
choose alternative settings at will or when bandplans are updated.
Should you wish to change the default step size press [2ndF] [2]. The legend
“STEP kHz” will flash on the LCD to indicate that the receiver is expecting a
change of step size. If the legend “PROG” is displayed on the top row of the
LCD then the step size is currently set to the automatic PROGRAM default. It
is possible to override the PROGRAM default. Available step sizes are:
NFM & AM: 5kHz, 6.25kHz, 9kHz, 10kHz, 12.5kHz, 20kHz, 25kHz,
30kHz, 50kHz & 100kHz.
WFM: 50kHz & 100kHz.
Use the UP / DOWN keys or [DIAL] to change the step size selection which is
displayed to the left of the flashing “STEP kHz” legend. When you have made
the new selection press [ENT]. Should you choose not to change the setting,
press [CLR].
Once you have changed the step setting
from PROGRAM it may only be reinstated
by selecting “PROG” in the mode input
using the sequence [2ndF] [3] (mode).
There is just one small point to remember,
the active frequency must be divisible by
the step size... in 99% of cases they
will be. However, should you start
experimenting with different step sizes you
may notice the active frequency change automatically to the nearest multiple of
step size as the AR2700 calculates automatically for you, there is no need to
carry a calculator!
For example, select 118.000 MHz [1] [1] [8] [ENT] then select a 9 kHz step
size [2ndF] [2] choose “9.00” by rotating the [DIAL] and accept the selection
by pressing [ENT].
You will note the frequency has been corrected to 117.99900 or 118.00800
MHz (depending upon the previous
direction of tuning / searching) both of
which are the closest multiple of 9 kHz to
118 MHz.
Note: PROGRAM-STEP and
PROGRAM-MODE are linked to the
pre-programmed bandplan data. When
one of the parameters is changed from the
default “PROG” the bandplan will be
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