Press the [SQL] key. The SQ legend on the LCD will reverse to negative image.
Push the [SQL] key again to toggle “OPN” (open) and “S0 ~ S9, +10, +20 ~ +60”
(close). When a range between S0 & +60 is displayed, rotate the main dial to
change the squelch threshold value. If you want the squelch open press the [ENT]
key while the “OPN” legend is displayed.
In order to obtain an optimum squelch threshold level, press the [SQL] key, the “SQ”
legend on the LCD will reverse to a negative image. Press the [SQL] key to initially
select “S0”. Either rotate the main dial or [←] [→] keys to vary the squelch between
S0 and S9, & +10 & +60 until the background noise (in the absence of a signal) is
quieted, if a transmission is in progress, it may not be possible to close the squelch.
Press the [ENT] key when you have selected an optimum squelch threshold.
{figure 9}
The squelch threshold level is displayed as a blue horizontal bar meter at the bottom
of the signal meter (S-meter bar graph). It is important that the squelch level is not
set too high or weaker signals will not be audible (as the squelch will remain closed).
NOTE: The scan/search process will not begin when the received signal is below
squelch threshold.
{figure 10}
A Dial mode
The AR7000 is equipped with the 2 dial modes, VFO-A and VFO-B. You can
manually select/enter the receive frequency, receive mode, etc.
VFO is a historical term for Variable Frequency Oscillator, today it is used to describe
a facility which stores frequency & mode which may be tuned.
Manual frequency entry
Example 1
Enter the frequency of 209.75MHz in VFO-A.
1. Push either the [←] or [→] key to access VFO-A (upper of the two large frequency
readouts).
2. Press the [MODE] key for more than one second. Rotate the main dial or push
the [←] or [→] keys to obtain the LCD legend “AUT” (automode, where the AR7000
automatically selects the appropriate receive mode, channel step and IF bandwidth
for the displayed frequency) followed by [ENT].
{figure 11}
3. Push [2] [0] [9] [.] [7] [5] [ENT]
{figure 12}
Example 2
Enter 954kHz, still using VFO-A.
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