Radio Shack 20-422 owner manual Frequency Range MHz Step kHz

Key Confirmation Tones — the scan- ner sounds a tone when you perform an operation correctly and sounds an error tone if you make an error.

Memory Backup — keeps channel fre- quencies stored in memory for an ex- tended time even if your scanner loses power.

External Speaker Jack — lets you con- nect an external speaker, or an ear- phone or headphones for private listening.

External Antenna Terminal — lets you connect an external antenna (not sup- plied) for improved reception.

Your scanner can receive all of these frequencies:

•29–54 MHz (10-Meter Amateur Radio, VHF Lo, 6-Meter Amateur)

•108–136.975 MHz (Aircraft)

•137–174 MHz (Government, 2- Meter Amateur Radio, VHF Hi)

•406–512 MHz (UHF Lo, 70-Centi- meter Amateur Radio, Government, UHF “T” Band)

This table shows the preset frequency steps your scanner uses for each fre- quency range.

Frequency
Range (MHz)	Step (kHz)
29–54	5
108–136.975	12.5
137–144	5
144–148	5
148–174	5
406–450	12.5
450–470	12.5
470–512	12.5

Note: The frequency steps are preset. You cannot change them.

Your scanner can also receive these preprogrammed weather channel fre- quencies:

•162.400 MHz

•162.425 MHz

•162.450 MHz

•162.475 MHz

•162.500 MHz

•162.525 MHz

•162.550 MHz

3