AOR AR8000 Operating Manual page 17

revert to VFO mode.
[2-VFO] [A=B] - twin VFO / equalise memory /
manual search key
The AR8000 receiver has a 2 VFO system being identified as "A" and "B" on
the LCD to the left of the frequency readout. The term VFO historically means
"Variable Frequency Oscillator" and today refers to a tunable data store which
contains frequency, mode, channel step, step offset and attenuator informa-
tion.
Both VFO frequencies are displayed in parallel format on the LCD one above
the other. The "active" VFO (the one which is currently receiving) is displayed
on the second line and the "stand-by" VFO on the third line below.
When the AR8000 is in a programming mode other than 2VFO such as
SEARCH, SCAN or DATA ENTRY, this key places the set into 2VFO mode.
The display legend "2VFO" appears at the top left hand corner of the first line
of the LCD. The same line will indicate whether the active VFO has the
attenuator switched On signified by the letter "A" to the right of "2VFO". The
top right hand corner of the LCD indicates the current mode (AM, NFM, WFM,
USB, LSB, CW) of the active VFO.
The second line of the LCD displays the ACTIVE VFO frequency.
The third line of the LCD displays the STAND-BY VFO frequency.
The fourth line of the LCD indicates whether the active VFO squelch is open
using the legend "S", to the right is the signal strength presented as a vertical
bar graph. The stronger the signal then the larger the graph, if there is no
signal present the fourth line will be blank. It is quite common for the first
three signal meter segments to appear due to background band noise
even when no signal is present.
If the [2VFO] key is pressed while in 2VFO mode, the active and stand-by VFO
change positions. i.e. VFO A becomes stand-by and VFO B active and visa
versa whenever the [2VFO] key is pressed.
If the sequence [FUNC] [2VFO] is keyed while in 2VFO mode the receiver
equalises the data in both VFOs so that their contents are identical to the
active VFO (top VFO). Both VFO displays will appear identical. This is
particularly useful when quickly setting up a manual search.
If the [2VFO] key is pressed and held for more that one second, the receiver
enters MANUAL SEARCH. The frequency of VFO A and VFO B must be
different or no search will take place. If the mode and channel step size are
different in VFO and VFO B then the active VFO data will be used to form the
parameters for search.
When MANUAL SEARCH mode is entered the display legend "MANU SRCH"
appears on the third line of the display.
Should the receiver find an interesting busy channel, press [ENT] to save the
data into a memory channel. Please refer section 14 FREQUENCY PASS