{figure 32}
To adjust the squelch threshold level
Press the [SQL] key to toggle “OPN” and “S-meter value”. While S-meter value is
indicated, rotate the main dial or push the [
→]
or [
←]
keys to vary the squelch S-
meter value.
Push the [ENT] key when you have selected the desired value.
{figure 33}
The squelch value is indicated as a blue line displayed underneath the S-meter.
Note: The scan/search will only begin when the background signal (noise) is below
squelch threshold.
1.5 AGC setting
The AR7000 is provided with AGC (Automatic Gain Control) positions, “FAST” and
“SLOW”. Each press of the [AGC] key toggles between the FAST and SLOW
positions. A fast setting is usually best for CW operation when receiving Morse code
and other data modes, at all other times SLOW is usually the best choice.
{figure 34}
1.6 ATT (Attenuator) setting
The AR7000 is equipped with a 10dB RF attenuator, this can be useful for reducing
the effect of strong local signals which otherwise may lead to “mixing” inside the
receiver’s circuitry (common to all receivers). Each press of the [ATT] key will toggle
the attenuator ON and OFF.
The legends have the following meaning:
ATT
Attenuator legend represents ON, set is least sensitive.
No legend. Set is most sensitive, attenuator OFF.
Note: Do not be confused by the “OFF” legend under the attenuator status, this
refers to the IF SHIFT facility.
{figure 35}
1.7 IF Shift (WFM,AM,CW,USB,LSB only)
The AR7000 is equipped with an IF SHIFT control which can vary the centre
frequency of the IF within a range of +/-8500Hz at a rate of 100Hz without affecting
the received signal. This feature is very useful for moving the receive passband
