AOR AR8000 Operating Manual page 67

Either use the [DIAL] to change the value or key in a two digit number through
the numeric keypad. [0] [0] is accepted as 0.0 seconds (OFF) and [5] [3] as
5.3 seconds. The decimal point is automatically added by the AR8000. The
[ENT] key toggles the setting of DELAY between OFF and 2.0 seconds
(default).
Note: Setting DELAY to 0.0 turns the delay OFF. Under this condition, the
receiver may start to scan before the transmission has finished due to
signal level changes such as mobile flutter or signal fading.
To accept the changes to DELAY scan, you must first use the UP/DOWN keys
to change the cursor position to another line then press [ENT] to return to
SCAN mode. This is because the [ENT] key has a special function in DELAY
programming as mentioned above.
Alternatively you may move to the next option (AUDIO SCAN) by pressing the
[DOWN] key.
SCAN - AUDIO scan
The AUDIO scan parameter determines the way in which an "active" channel is
determined. When the AUDIO scan is "ON", the scan will only stop on active
channels which have modulation (such as voice) present. The AR8000 will not
remain on unmodulated channels (such as blank carriers).
You may find this facility useful for skipping over STRONG signals but
WEAKER noisy signals may "fool" the receiver into thinking that modulation is
present.
The options are ON or OFF, the default is OFF. Rotate the [DIAL] to toggle
the option On / OFF.
To accept the changes to AUDIO scan press [ENT] to return to SCAN mode.
Alternatively you may move to the next option (FREE SCAN) by pressing the
[DOWN] key.
SCAN - FREE scan
The FREE scan parameter determines how long the receiver will remain on an
"active" channel before resuming scanning channels.
This is useful if you wish to gain a picture of what is happening on the memory
channels without the receiver being tied to a busy channel for long periods of
time (such as when monitoring active amateur band repeaters etc). Free scan
saves you having to manually intervene to force the scan to continue or use
PASS channels.
The limits are 00 to 99 seconds with 00 being interpreted as FREE scan OFF.