Motorola GTR8000 VHF 136-174 Mhz 6 Channel ASTRO 25 Expandable Site Subsystem


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Product Overview

Motorola Astro 25 Expandable Site Subsystem, ie: “6 pack”.  This is a 6 Channel VHF  136-174 Mhz expansion site that comes complete with the following equipment:

(6)  GTR8000’s VHF Repeaters

(2)  GCP Site Controllers

(1) GGM8000

(1) Optional Combining Equipment is available.  We would need to have the exact frequency in order to provide a quote for Transmit Combiners, Receiver filters and multicoupler.

System is fully operational and comes with everything you see in the photos.  You are welcome to come to our staging facility and preview the equipment prior to purchase. We can program the system to your freqs for an additional fee, we would need to know the frequencies in order to provide a staging quote. This system will consist of 1 rack and will require freight shipping.  We will cap the shipping at $250.00 ONLY for lower 48 states.   If you have any questions, please contact us.


Due to the FCC Narrowbanding mandate in the United States, product specifications and brochures for Motorola Solutions two-way radio products may indicate 25 kHz/12.5 kHz analog/digital operation which may not be the standard mode of operation at the time of shipment after Jan. 1st 2013.


ASTRO® 25 Trunking
GTR 8000 Expandable Site Subsystem (ESS), Motorola's premier turnkey RF site design, provides the optimal P25 trunking solution for easy installation and high availability. All base radios, networking equipment, timing and frequency distribution, RF combining and multi-coupler equipment are factory integrated into a single rack or cabinet.

ASTRO® 25 Data
Motorola's Integrated Voice and Data (IV&D) in ASTRO® 25 trunking and conventional systems as well as High Performance Data (HPD) are supported by the GTR 8000. Voice and data transmissions switch dynamically on the same base radio for ease of use.

ASTRO® 25 & Analog Conventional
Motorola's Conventional channel solutions range from small single repeater sites to wide-area coverage voting and simulcast systems. The GTR 8000 Base Radio's high performing analog capabilities enable narrow-banding migrations that maximize audio performance.

3600 Trunking
The GTR 8000 base radio supports 3600 trunking operation, enabling new future-ready base radios to be added to existing SmartZone systems with SmartX. The GTR 8000 is software upgradeable to P25 trunking when the time is right to migrate to P25. 3600 trunking operation is available on both simulcast and IntelliRepeater systems, in either analog or digital mode.


Maximum Coverage
Multisite Linear Simulcast offers industry-leading coverage with fewer sites

Receive Diversity
Two branch diversity receiver expands talk-in coverage for HPD and TDMA trunking

Superior Audio
100 ppb frequency stability directly enhances analog audio performance

Dual Connections
All channels remain online and on air in the event of a network switch or timing/frequency reference failure

Battery Revert and Charging
Eliminates need for an uninterruptible power supply (UPS) in many installations

Easy Install
Ships factory aligned ready for installation

Hot Swap Hardware
Service and replace hardware without system down-time

Online Software Download
Download software while online and fully operational

Front Serviceable
Perform all servicing from the front of the station

Compact Hardware
Standalone deployment utilizes a 3 rack unit chassis

Reduced Number of Racks and Cabling
Expandable Site Subsystem conserves power and space by integrating controllers, switches, cavity combining, TX filtering, multicouplers & preselectors into one vertical cabinet/rack

Front Access Connections
Install within inches of the wall and save valuable site space

Future Ready
No new hardware required to convert for narrow-banding, from conventional to trunking, from 3600 trunking to P25 trunking, from FDMA to TDMA, or from single to multi-site configurations

Software Defined Radio
Upgrade to new functionality through software updates and configuration changes

Password Protected
Password-only, user/password, and RADIUS server authentication configurations are supported

Secure Connectivity
Secure SNMPv3 and secure shell (SSH) IP connectivity provided with Microsoft Windows® Configuration Service Software

Robust, Hardened IP Stack
Built to comply with Department of Defense STIGs for secure network communications


System Types
• P25 Conventional and Trunking, 3600 Trunking, Analog Conventional
• Site Repeater, Voting, Simulcast and Multicast Configurations
• ASTRO® 25 Integrated Voice & Data (IV&D)
• High Performance Data (HPD)

• Analog FM (12.5kHz, 25kHz)
• Linear Simulcast
• P25 FDMA (C4FM)
• P25 TDMA (6.25kHz Trunking Only)
• Mixed Mode Analog/Digital

Network Connectivity
• IP
• V.24 Digital (Motorola DIU and ASTRO-TAC 3000 interfaces)
• Analog Wireline (2-wire, 4-wire or 8-wire)


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