Attention While Operating - AOR AR8600 Operating Manual

Operating anomalies
Should the AR8600 appear to behave strangely, normal operation may be easily achieved by resetting
the microprocessor. Two scenarios may be encountered due to power transients etc:
1. Symptom: LCD remains on, no control of the keypad.
Action: Remove any connection to external power such as the power supply or cigar
lead (remove the optional BP8600 internal NiCad battery pack if fitted) and
count to thirty! Reconnect power (or refit the battery) and switch on again.
Normal operation should be restored but the last used frequency will be lost, the
AR8600 will restore the last but one frequency to display.
2. Symptom: The AR8600 fails to power up.
Action: Try the suggestion given in (1) then hold the
AR8600 to 'Soft reset' the microprocessor.

1-3 Attention while operating

1. Certain key operations are acted upon when the key is RELEASED, not while it is pressed. Allow
time for the AR8600 to register such actions before pressing another key.
2. The keylock
To release keylock, the
LCD confirms operation. The
entering frequencies).
3. If a key sequence is not completed, the microprocessor will automatically abort most operations
after about 90 seconds of keypad inactivity.
4. Currently displayed VFO data is saved at power down (to increase speed of operation and to
reduce write cycles). For this reason, if the AR8600 is powered down using the PWR/VOL control or
external power is removed (without the optional internal BP8600 battery fitted or becomes
exhausted), the last displayed frequency will be lost and the frequency used prior to this will be
displayed when next powered up.
Terminology - Search & Scan
If you have not used a wide range monitor before or are not familiar with the terminology used, it is very
important to understand the difference between SEARCH and SCAN modes.
SEARCH: The AR8600 provides several operations where transmissions (active frequencies) may
be automatically located by sweeping the receiver over a wide frequency range, either from the
currently displayed frequency travelling upwards (or downwards) in a specified tuning increment
(step) or by sweeping over-and-over between two specified frequency limits. This process is known
as SEARCHING, as the title implies, it can take a long time to find transmissions due to their 'often
intermittent' and brief nature. For this reason it is best to slice large frequency ranges into smaller,
more manageable pieces where they may be intensively studied.
When examining large frequency bands, it is common to find that 90% of frequencies are inactive
and only a small number of the remaining constitute what you really want. Searching still remains
the best way to initially locate active and interesting transmissions (in conjunction with a good
frequency listing and band plan).
SCAN: Once active transmissions have been identified (either by searching or by using a good
frequency guide), it is more efficient to store the data into memories which can be rapidly and
automatically monitored in succession stopping when activity is encountered. This forms a much
more efficient means of monitoring the most wanted frequencies as you have targeted 100% what
you most want to hear, by contrast searching is very inefficient for day-to-day monitoring.
is intentionally made to be difficult to operate to prevent accidental operation.
key has to be held for more than one second, the key legend on the
key is disabled during keying sequences (such as when
key while powering up the