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20-428 Owner's Manual
Note: MO (MOT), ED, and LT modes are not available when the scanner tunes up or down through
the frequency ranges in which the trunking operation is not used.
using the attenuator
To reduce interference or noise caused by strong signals, you can reduce the scanner's sensitivity to
these signals.
There are two attenuator modes in your scanner. One is normal attenuator mode in which you set
the attenuator in each channel or each band/group in the search and tune mode. The other is global
mode in which you set the attenuator only once. This setting is applied all the time in every mode.
Press ATT to turn on or off the attenuator while the channel number is indicated or while the
scanner is searching through bands/groups. When the attenuator is on, att changes to ATT.
When you turn it off, ATT changes to att. You cannot set the attenuator while the scanner is
scanning.
Press FUNC and then ATT to set the attenuator to its global mode. Global ATT. appears for 2
seconds at the bottom line and atg appears. Press ATT to turn the attenuator on or off. ATG or atg
appears on the second line.
Press FUNC and then ATT again to turn off the global attenuation mode. Normal ATT. appears on
the bottom line for about 2 seconds.
Note: If you turn on the attenuator, the scanner might not receive weak signals.
turning the key tone on and off
Each time you press any of the scanner's keys, the scanner sounds a tone. To turn the scanner's key
tone off or on:
1. If the scanner is on, turn OFF/VOL counterclockwise until it clicks to turn the scanner off.
2. Turn OFF/VOL clockwise to turn the scanner on. Multi-system Trunking Scanner appears.
3. While Multi-system Trunking Scanner appears, press 1 to turn on the key tone or 2 to turn it off.
using the dimmer
Repeatedly press DIM to adjust the brightness of the display backlight to Dark, Light Off, or Light.
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