Config - Frequency Standard - AOR AR5000A Operating Manual

7 Rotate the MAIN DIAL to select "ANT 4 4 4 4 4 ". Delete any
data already programmed using the
legend "- - - - - - - - - -" is displayed.
Starting at AERIAL 4 channel 0 key in the lowest
frequency limit
upper frequency limit
8 To accept the data input press
return to VFO (or memory, scan or search mode,
whichever was previously in use).
If the set is not already in VFO mode press
keying in a few test frequencies to confirm correct aerial
selection depending upon frequency, if automatic switching
does not take place, ensure that AUTO aerial switching
has been selected. To review and change the selection
press to access the aerial selection menu.
Press the key to select "AUTO
SUB DIAL). To accept the selection press
Exceptions & anomalies
As mentioned earlier in this section 6-20 there are a couple
of exceptions...
1 AERIAL 1 "ANT 1 1 1 1 1 " need only be programmed if you
wish to chop holes in the programming of other aerial
selections... for example the programming of AERIAL 1
channel 0 OVERRIDES the programming of AERIAL 2
channel 2 (as the lowest aerial number takes precedence)
causing frequencies above 190 MHz to use aerial 1. As
aerial 1 "ANT 1 1 1 1 1 " is the default for all frequencies not
specified, there is no reason to program it as standard.
Creative thinking makes programming of aerial 1 useful
for short cut overriding of detailed automatic aerial
switching. For example select 10 kHz ~ 2600 MHz for
aerial 1 and the automatic program will be defeated!!!
2 In a similar way to the above exception, the
programming of AERIAL 3 in the above example overrides
the programming of AERIAL 4 causing AERIAL 4 to be
used for frequencies between 90 and 120 MHz only.
Auto aerial switching with program search mode
To enable the fastest rates of search while in program
search mode, automatic aerial switching is not selected
as default when programming the search parameters.
However you may still manually change the aerial selection
when in program search mode. Simply initiate whatever
search bank is required (refer to sections 12-4 & 12-5 of
this manual covering program search mode) then override
the current aerial selection by pressing
to select automatic aerial switching...
of course ANT 1, ANT 2, ANT 3 or ANT 4 may be selected
using this menu (don't use
instead).
PAGE 32 AR5000 OPERATING MANUAL
key until the
then key in the
. The display will
. Try
AUTO AUTO
AUTO" (or use the AUTO
, use the SUB DIAL

6-21 CONFIG - Frequency standard

The AR5000 is fitted with a 12.8 MHz internal TCXO
(Temperature Compensated Crystal Oscillator) as
standard to ensure the ultimate in frequency precision.
However where a piped 10 MHz external frequency
standard exists (which is usually referenced to an atomic
signal) such as high quality workshops or professional
monitoring centres, a high quality external 10 MHz
reference may be coupled to the STD IN BNC socket on
the rear of the AR5000. Before an external reference
can be used, the STD.INT/EXT menu must be
configured using the CONFIG menu, it is default to
INTernal.
To enable the EXTernal 10 MHz input, access the CONFIG
menu by pressing
keys to scroll through the menu until the "STD.INT
is displayed. (The easiest way is to use the
once).
LAMP ON
BEEP 4
EXT-IF OFF
BPS 9600
ANT 1
STD.INT 12.8 STD.INT 12.8 STD.INT 12.8 MHz <<< STD.INT 12.8 STD.INT 12.8
The SUB DIAL is used to make selection between
"STD.EXT 10.0 STD.EXT 10.0 STD.EXT 10.0 STD.EXT 10.0 MHz" (external) and "STD.INT 12.8 STD.EXT 10.0
MHz" (internal).
To accept the selection press
memory recall, scan or search, whatever was previously
in use.
To abort entry press
EXT EXT
Note: If "EXT EXT EXT" (external) is selected without a valid 10
MHz reference present, the AR5000 will not receive, there
will be no audio output (not even white noise) and
PLL-ERR" (PLL error) message will be PLL-ERR PLL-ERR PLL-ERR
eventually the "PLL-ERR
displayed.
. Use the
STD.INT" menu STD.INT STD.INT STD.INT
key
STD.INT 12.8 STD.INT 12.8 STD.INT 12.8 STD.INT 12.8
to return to VFO,