647706

Uniden BCD325P2 Manual

15
Zoom out
Zoom in
Previous page
1/132
Next page
15
CTCSS and DCS systems all use some form of coded squelch. Coded squelch
techniques involve the transmission of a special ‘code’ signal along with the audio
of a radio transmission. A receiver with coded squelch only activates when the
received signal has the correct ‘code’. This lets many users share a single frequency,
and decreases interference caused by distant transmitters on the same channel. In
all major metropolitan areas of the United States, every available radio channel is
assigned to more than one user. Public safety radio systems on the same frequency
are usually set up at a distance of 40 miles apart, or more. This means that you may
hear transmissions from a distant system when your local system is not transmitting.
By programming the CTCSS tone for a local channel the scanner will not stop on
transmissions from the distant system. With few exceptions, such as the VHF Aircraft
and Marine bands, almost every other VHF or UHF radio system uses some form
of coded squelch. By far, CTCSS is the most popular mode among non-trunked
systems.
NAC, similar to CTCSS/DCS, has a 3 digit hexadecimal code that is broadcast along
with the digital signal being transmitted.
UNDERSTANDING TRUNKING
Trunking systems let a large group of 2-way radio users (or even different groups
of 2-way radio users) efficiently use a set of frequencies. Instead of selecting a
specific frequency for a transmission, the user’s radio selects a programmed trunking
bank in the system when that user presses their PTT (push to talk) button. The
trunking system automatically transmits the call on the first available frequency, and
also sends (on a different frequency called a Data or Control channel) a code that
uniquely identifies that transmission as a talkgroup ID (or just ID.) So when you are
trunktracking a system, you are listening to active IDs transmitting in the system
(each using the first available frequency in the system.) Trunking systems in general
allocate and use fewer frequencies among many different users.
Since the trunking system might send a call and its response on different
frequencies, it is difficult to listen to trunked communications using a conventional
scanner. A trunktracker let you monitor the control channel frequency so you can
hear calls and responses for users and more easily “follow” conversations than with
a conventional scanner.
This trunking scanner tracks the following types of systems:
… 15 …


Need help? Post your question in this forum.

Forumrules


Report abuse

Libble takes abuse of its services very seriously. We're committed to dealing with such abuse according to the laws in your country of residence. When you submit a report, we'll investigate it and take the appropriate action. We'll get back to you only if we require additional details or have more information to share.

Product:

For example, Anti-Semitic content, racist content, or material that could result in a violent physical act.

For example, a credit card number, a personal identification number, or an unlisted home address. Note that email addresses and full names are not considered private information.

Forumrules

To achieve meaningful questions, we apply the following rules:

Register

Register getting emails for Uniden BCD325P2 at:


You will receive an email to register for one or both of the options.


Get your user manual by e-mail

Enter your email address to receive the manual of Uniden BCD325P2 in the language / languages: English as an attachment in your email.

The manual is 4,47 mb in size.

 

You will receive the manual in your email within minutes. If you have not received an email, then probably have entered the wrong email address or your mailbox is too full. In addition, it may be that your ISP may have a maximum size for emails to receive.

The manual is sent by email. Check your email

If you have not received an email with the manual within fifteen minutes, it may be that you have a entered a wrong email address or that your ISP has set a maximum size to receive email that is smaller than the size of the manual.

The email address you have provided is not correct.

Please check the email address and correct it.

Your question is posted on this page

Would you like to receive an email when new answers and questions are posted? Please enter your email address.



Info