Basics of Scanners by Aaron Siller N5AMS

Basics of Trunking  Trunking  Updated Scanner Frequencies

What is a Trunking System A specialized repeater system with one or more towers and multiple frequencies A specialized repeater system with one or more towers and multiple frequencies This also allows channelized, semi-private conversations between many more groups of users This also allows channelized, semi-private conversations between many more groups of users

Types of Trunk Systems Project 25 Project 25 Motorola Smartnet/Smartzone Type I, II Motorola Smartnet/Smartzone Type I, II EDACS EDACS LTR LTR

Project 25 Trunking This is the new digital systems that can use a mix of 700/800MHz, UHF, and VHF frequencies This is the new digital systems that can use a mix of 700/800MHz, UHF, and VHF frequencies TxWARN (Texas Wide Area Radio Network) TxWARN (Texas Wide Area Radio Network)

Who uses P-25 in Houston

Analog Motorola System Type I Type I Type II Type II

Analog Motorola System Type I The Original Motorola Systems that were based on Fleets and Subfleets. The Original Motorola Systems that were based on Fleets and Subfleets. Each system had a certain number of Fleets assigned, and then each Fleet had a certain number of Subfleets and radio Ids. Each system had a certain number of Fleets assigned, and then each Fleet had a certain number of Subfleets and radio Ids.

Analog Motorola System Type II Motorola Type II Smartnet is a 2nd generation Motorola Trunking system Motorola Type II Smartnet is a 2nd generation Motorola Trunking system The term Smartnet refers to a set of features that make Motorola Type I and II trunked systems APCO-16 compliant The term Smartnet refers to a set of features that make Motorola Type I and II trunked systems APCO-16 compliant This allows for better security, emergency signaling, dynamic regrouping, remote radio monitoring, and Several other features This allows for better security, emergency signaling, dynamic regrouping, remote radio monitoring, and Several other features

Analog Motorola System SmartZone systems are comprised of Type II Smartnet systems that are networked together via microwave or land-line data circuits to provide multi-site wide-area communications SmartZone systems are comprised of Type II Smartnet systems that are networked together via microwave or land-line data circuits to provide multi-site wide-area communications A feature unique to SmartZone and allows efficient use of channels at each site is called "Dynamic Site assignment.” A feature unique to SmartZone and allows efficient use of channels at each site is called "Dynamic Site assignment.”

Analog Motorola System The characteristics of a Motorola SmartZone system are similar to Smartnet systems with the following changes: The characteristics of a Motorola SmartZone system are similar to Smartnet systems with the following changes: Up to 28 channels per site Up to 28 channels per site Up to 64 sites Up to 64 sites Analog and/or digital voice Analog and/or digital voice

Analog Motorola System Monitoring a SmartZone system with a trunktracking scanner is the same process as monitoring any other Type II Smartnet system, except that you can only monitor one site at a time Monitoring a SmartZone system with a trunktracking scanner is the same process as monitoring any other Type II Smartnet system, except that you can only monitor one site at a time For you to monitor a specific talkgroup on a SmartZone site, someone's radio must be affiliated to that specific site For you to monitor a specific talkgroup on a SmartZone site, someone's radio must be affiliated to that specific site

Enhanced Digital Access Communications System (EDACS) EDACS is much like a Motorola System except in a EDACS system they use Logical Channel Numbering(LCN) EDACS is much like a Motorola System except in a EDACS system they use Logical Channel Numbering(LCN) Rather than assign a frequency with a specific identifier, each frequency at a site is assigned a number between 1 through 25 Rather than assign a frequency with a specific identifier, each frequency at a site is assigned a number between 1 through 25

Who uses EDACS

Logical Trunked Radio(LTR) LTR is kinda like EDACS except unlike Motorola and EDACS, LTR doesn't have a dedicated control channel. LTR is kinda like EDACS except unlike Motorola and EDACS, LTR doesn't have a dedicated control channel. Each repeater has its own controller and all of these controllers are coordinated together. Each repeater has its own controller and all of these controllers are coordinated together.

Logical Trunked Radio(LTR) Each of these controllers periodically sends out a data burst (approximately every 10 seconds on LTR Standard systems) so that the subscriber units know that the system is there. Each of these controllers periodically sends out a data burst (approximately every 10 seconds on LTR Standard systems) so that the subscriber units know that the system is there. Much like EDACS, LTR is limited to 20 channels per site Much like EDACS, LTR is limited to 20 channels per site

Who uses LTR

North Shepherd Dispatch (123.0) Northeast Dispatch (123.0) Southeast Dispatch (123.0) Southwest Dispatch (123.0) Citywide (123.0) Central Dispatch (123.0) Special Ops Dispatch (123.0)

Channel 8(simplex only) (123.0) South Central Dispatch (123.0) Channel (123.0) Northwest (123.0) Westside Dispatch (123.0) VICE (123.0) IAH Dispatch (123.0) IAH Dispatch (123.0)

Fire/EMS Dispatch (127.3) North Ops TAC (127.3) Central/West Ops TAC (127.3) South Ops TAC (127.3) EMS TAC (127.3) General Info TAC (127.3) Fireground TAC (127.3) Fireground TAC (127.3)

Humble Fire/EMS (118.8) Atascocita Fire/EMS (103.5) Huffman Fire Department (136.5) MCHD (146.2) Conroe FD (146.2) MCFD (107.2) MCFD (107.2) MCFD (107.2) Scanner Frequencies (Cont.)

Groups.yahoo.com/group/houstonscan Frequency Links