Zartek PT8, Руководство пользователя, Страница: 10 / 13

10
When you press the PTT talk button a signal is transmitted and the
signal floods the area in all sideway directions. The signal travels in
3 different ways:
1
) Penetration : The signal can go through materials such as wood,
plastic, cement and fabric. The denser the material or more built up
the environment the weaker the signal will become. The signal
cannot go through solid metal or very large solid land structures
such as a hill or mountain. Metal acts like a shield and that is why
the performance from the inside of a vehicle (car or 4x4) will be less
than outside.
2
) Reflection : The signal cannot go through metal or very large
structures such as a hill or mountain, but it can bounce off (like a
mirror), go around and reflect in other directions as well. This
happens at the speed of light.
3)Line-of-sight : Line-of-sight is when there are no obstructions in
the path between the communicating parties. The higher up you go
the further you can see, so the larger the line-of-sight distances will
be. Generally you can talk to wherever you can see, which is why
the coverage in a valley is much less than the coverage from on top
of a hill.
Ensure that there is nothing blocking the antenna .The less metal in
close proximity (0-2m) the better the range. There may be external
interference from electrical equipment (power lines or factories) or
natural causes (moisture in the air or storms) that may vary
depending on the location and the weather.
(9) MENU FLOW CHART
Press the
MENU key once to enter main channel selection, press
MENU again for next function selection etc.
Main Screen
→ Main Channel →CTCSS → VOX → Call Tone →
APO → Key tone → Roger Beep → Main Screen