Clearing A Scan Channel; Marking A Sequential Group Of Channels As "Available - AOR AR1000 Manual

AR1000 Operations
Therefore, it is a good idea to periodically go through your scan banks, using the
MANUAL key, to review the status of your channels. If the L.OUT indicator is
flashing while looking at any channel, that channel has been locked.

Clearing a scan channel

You may have noticed when you received your AR1000 that not every channel
had something in it. Often the first ten or so channels of each bank come pro-
grammed with some test frequencies that are used during final testing at the
factory. Many of the other channels are empty. There is a difference between a
locked channel and cleared channel.
You can directly clear a channel by going to the channel and pressing CLEAR,
ENT, and a mode key. A cleared channel will contain nothing in it (only the
decimal point is displayed). When you press the MANUAL key to sequentially
move through the channels, the AR1000 will skip over a cleared channel. In other
words, if channels 127 through 134 are cleared and you start on channel 125,
when you press MANUAL the first time, you will move to channel 126. The
next time you press MANUAL, you will move immediately to channel 135. The
only way to get to a cleared channel is with the BANK key.
If, on the other hand, channels 127 through 134 have frequencies programmed
in them but are locked, each time you press MANUAL, you will move to each
channel within the range 127 through 134. In both cases, while scanning, these
channels will be skipped.
While it would be nice to take advantage of cleared channels, users have reported
that if they clear out enough channels, the AR1000 will lock up completely,
requiring a processor reset. This usually involves a trip to the factory, although
we provide instructions for resetting and reprogramming the processor in this
guide.
Because of this nasty tendency, we recommend that you do not clear channels in
the AR1000. Instead, use a "placeholder" frequency to mark the channel as
"available." A frequency like 10 MHz works well as a placeholder.

Marking a sequential group of channels as "available"

If your scanner contains many no-longer-used channels or for some reason you
want to get rid of a group of existing frequencies, the following technique will be
helpful. You may wonder why you might want to get rid of existing frequencies
when you can just lock them out. With so many channels to keep track of, it is
sometimes easier to plug in a placeholder frequency. For example, let's say you
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