Specifications
This section provides you with background on how scanning
works. You don’t really need to know all of this to use your
scanner, but some background knowledge will help you get the
most from your EZI30XLT.
What is Scanning?
Unlike standard AM or FM radio stations, most two-way
communications do not transmit continuously. Your EZI30XLT
scans programmed channels until it nds an active frequency,
then stops on that frequency and remains on that channel as
long as the transmission continues. When the transmission
ends, the scanning cycle resumes until the scanner receives
another transmission.
Conventional Scanning
Conventional scanning is a relatively simple concept. Each
group of users in a conventional system is assigned a single
frequency (for simplex systems) or two frequencies (for repeater
systems). Any time one of them transmits, their transmission
always goes out on the same frequency. Up until the late 1980’s
this was the primary way that radio systems operated.
Even today, there are many 2-way radio users who operate
using a conventional system:
• Aircraft
• Emergency Services (Police/Fire/Ambulance)
• Railroad
• Broadcast FM stations
• UHF CB Radio
• Marine Radio
• Many business radio users
When you want to store a conventional system, all you need
to know is the frequencies they operate on. When you are
scanning a conventional system, the scanner stops very briey
on each channel to see if there is activity. If there isn’t, the
scanner quickly moves to the next channel. If there is, then the
scanner pauses on the transmission until it is over.
UNDERSTANDING SCANNING
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UNIDEN EZI30XLT Scanner