AOR AR5000 User Manual download pdf (Page 19)

AR5000 OPERATING MANUAL PAGE 19

Providing the AUTOMODE facility has been engaged

(so that the “AUTO” legend is displayed above the right

hand digit of frequency readout), you may monitor the

frequency or tune the receiver using the MAIN DIAL or

SUB DIAL. The AR5000 microprocessor will automatically

select the appropriate tuning increment, mode and I.F.

bandwidth from the detailed automode bandplan data

pre-programmed into the receiver (specific to each world

market area). If automode is not active, press and hold

the

key for more than one second. The “AUTO”

legend on the LCD will confirm operation.

6-5 Correction of frequency during input via

the numeric keypad

Should a mistake be made while entering frequency via

the keypad in VFO mode, the

key may be used to

backspace delete the entry from the right hand side. If all

digits are deleted, the display will return to the previous

frequency.

6-6 Selecting tuning step (increment)

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 reason it is necessary to alter the STEP

size according to local bandplan conventions. The

AR5000 has been pre-programmed at the factory with all

the bandplan data (specific to each market area) so that

the AR5000 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.

The tuning step (often referred to as the tuning rate or

increment) is usually automatically set by the AR5000

using the automode bandplan information - WHEN

AUTOMODE IS ENGAGED.

To enable AUTOMODE, press and hold the

key

for more than one second, the “AUTO” legend will

appear on the LCD above the right hand (last) digit of

the frequency readout to confirm selection.

Most known step sizes are available with the exceptions

such as TV channels which are allocated with 6MHz or

4MHz spacing. There will be occasions when you may

wish to change the automode step selection so it is

possible to customise the step size used by the MAIN DIAL

and SUB DIAL (step size may also be programmed in search

mode).

MAIN DIAL

Only when the VFO mode is engaged may the MAIN DIAL

be used to select the receive frequency. Rotate the

MAIN DIAL to change the receive frequency, alternatively

the

and

keys can be used. Frequency will

step in the pre-programmed step size as dictated by the

automode bandplan data.

The

key enables the step size for tuning the

receiver to be customised.

Press the

key, the flashing legend “STEP” on the

LCD confirms that the STEP SELECT MENU has been

activated. If the legend ”AUT” is displayed above-right,

then the step will automatically be determined from the

automode bandplan data. As soon as another selection

is made automode is cancelled.

At this point the SUB DIAL may be rotated to select a new

step size for the MAIN DIAL from the following list: 0.001

kHz (1 Hz), 0.010 kHz (10 Hz), 0.050 kHz (50 Hz), 0.100

kHz (100 Hz), 0.500 kHz (500 Hz), 1.000 kHz, 5.000kHz,

6.250 kHz, 9.000 kHz, 10.000 kHz, 12.500 kHz, 20.000

kHz, 25.000 kHz, 30.000 kHz, 50.000 kHz, 100.000 kHz

and 500 kHz.

Once the selection has been made press

to accept

any changes. If you wish to abort step size selection press

In addition, unusual step sizes may be entered using the

numeric keypad (i.e.

for 22 kHz or

for 200 Hz). Acceptable input range is

1 Hz to 999.999 kHz.

Important: The receive frequency must be divisible by

the step size or the receiver will not receive the desired

frequency or follow the bandplan.

Examples:

Receive frequency / Step size

must = round number

433.200MHz/20kHz = Divisible (433200 / 20 = 21660 all okay)

152.010MHz/20kHz = Not divisible (152010 / 20 = 7600.5 so must

use the special STEP-ADJUST

FACILITY detailed section 6-7

of this manual).

1 2 ... 14 15 16 17 18 19 20 21 22 23 24 ... 76 77

Comments to this Manuals

No comments

AOR AR5000 User Manual Page 19

Comments to this Manuals

Related products and manuals for Receiver AOR AR5000