AOR AR5000A Operating Manual Download

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PAGE 20 AR5000 OPERATING MANUAL

Note: The

MAIN DIAL

is a mechanical encoder and as

such small variations in tuning may be experienced or the
frequency may move slightly after rotation, this is normal.
To ensure the best life span and smoothest operation,
rotate the control from time to time to ensure the encoder’s
track remains clean.

SUB DIAL

The

SUB DIAL

can also be used to select the receive

frequency in three different ways:

Same step size as the

MAIN DIAL

10 times faster than the

MAIN DIAL

One of the step sizes from 0.1 kHz (100 Hz),

0.5 kHz (500 Hz), 1.0 kHz, 5.0 kHz, 10.0 kHz,
50.0 kHz, 100.0 kHz, 500.0 kHz or 1000.0
kHz (1 MHz).

The

key enables the step size for the

SUB DIAL

be selected.

Press the

key, the flashing legend “STEP” on the

LCD confirms that the STEP SELECT MENU has been
activated. The first menu is for the

MAIN DIAL

so press

to move on to the

SUB DIAL

configuration

(if step adjust is in use the legend “*” will be displayed and
the

keys will require two presses to

increment to the

SUB DIAL

menu). The flashing legends on

the LCD “STEP” and “

SUB

” indicate that the

SUB DIAL

step selection menu has been activated. Use the

SUB DIAL

to make selection:

SUB MAIN
SUB x 10
SUB 0.1

kHz

MAIN

= tuning rate for the

SUB DIAL

will be the same as

that of the

MAIN DIAL

x10

= tuning rate of the

SUB DIAL

will be ten times faster

than the

MAIN DIAL

(i.e. a tuning rate on the

MAIN DIAL

25 kHz will be 250 kHz on the

SUB DIAL

0.1

kHz (100 Hz), 0.5 kHz (500 Hz), 1.0 kHz, 5.0 kHz,

10.0 kHz, 50.0 kHz, 100.0 kHz, 500.0 kHz, 1000.0 kHz
(1 MHz) = tuning rates for

SUB DIAL

When the selection has been made, press

accept the changes and return to VFO mode. If you wish
to abort step size selection press

6-7 Step-adjust

The AR5000 provides a powerful feature to enable
accurate following of unusual bandplans. When active,
the “STEP-ADJ” legend is displayed in the centre of the
LCD.

Step-adjust is used when the receiving frequency is not
divisible by the step size in use (It is possible that step-
adjust has been programmed into the automode bandplan
data for some world market areas). Therefore step-adjust
is useful for certain bandplans such as cellular which in
some areas starts as 917.0125 MHz then increments in
25 kHz steps. Another example is the CB allocation in
certain areas which starts at 27.60125 MHz then
increments in 10 kHz steps.

Example:

Tune through the UK CB frequencies of 27.60125 MHz in
10 kHz steps with mode set to FM, 15 kHz bandwidth.

Select frequency: Select the start frequency for tuning,
in this example 27.60125 MHz

Set up step: Press the

key to access the tuning

step menu. Select a step size of 10 kHz by pressing

. Select STEP-ADJUST by pressing

the “*” legend is displayed on the left of the LCD to confirm
operation. Complete the sequence by pressing

You may review or change the offset value used by
step-adjust via the STEP menu. Press

to access

the tuning step menu. Initially the step size is displayed,
press

to view the STEP-ADJUST value.

Note: It is possible to enter a new value of step-adjust
using the

SUB DIAL

and numeric keypad (i.e.

)

while viewing the step-adjust value, you can experiment
with interesting results! If you intend direct programming
please refer to the mathematical explanation at the end
of this section 6-7.

Half step:

If the original tuned frequency were a

round number such as 145.000 MHz with a step size
of say 25 kHz, the default step-adjust would be half of
the original step size (12.5 kHz).

Press

to accept the data input and return to VFO

mode. Alternatively press

to abort entry and return

to VFO mode.

Select receive mode: Press the

key and use

the

SUB DIAL