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双方向ラジオ Motorola XT420のPDF ユーザーマニュアルをオンラインで閲覧またはダウンロードできます。Motorola XT420 18 ページ。 Non-display model
Motorola XT420 にも：ユーザーマニュアル (18 ページ)

TALK RANGE

XT Series radios have been designed to maximize

performance and improve transmission range in the field. It

is recommended that you do no use the radios closer than

1.5 meters apart, to avoid interference. XT420 coverage is

16.250 square meters, 13 floors and 9 KM in flat areas.

Talk range depends on the terrain. It will be affected by

concrete structures, heavy foliage and by operating radios

indoors or in vehicles. Optimal range occurs in flat, open

areas with up to 9 kilometers of coverage. Medium range

occurs when buildings and trees are in the way. Minimal

range occurs when dense foliage and mountains obstruct

the communication path. To establish a proper two-way

communication, the Channel, Frequency and Interference

Eliminator Codes must be the same on both radios. This

depends on the stored profile that has been pre-

programmed on the radio:

Channel: Current channel that the radio is using, depending

upon radio model.

Frequency: The frequency the radio uses to transmit/

receive.

Interference Eliminator Code: These codes help minimize

interference by providing a choice of code combinations.

Scramble Code: Codes that make the transmissions sound

garbled to anyone listening who is not set to that specific

code.

Bandwidth: Some frequencies have selectable channel

spacing, which must match other radios for optimum audio

quality.

For details of how to set up frequencies and CTCSS/DPL

codes in the channels, refer to "Programming Features" on

page 14

Note:

Interference Eliminator Codes are referred also as

CTCSS/DPL codes or PL/DPL codes

English