Motorola SLR 8000 T8319A Digital Base Station Repeater 100W

Motorola SLR 8000 Digital Repeater Module (Model T8319A)

The Motorola MOTOTRBO™ SLR 8000 (Model T8319A) is an enterprise- and industrial-grade base station/repeater engineered for continuous 100% duty cycle operation at up to 100 Watts RF output power. Designed to withstand demanding marine, offshore, mining, and critical infrastructure telemetry environments, the SLR 8000 delivers voice and data communications across conventional, trunked, and multisite IP network topologies.

The T8319A platform integrates high-efficiency modular RF amplification, next-generation receiver filtering with extreme intermodulation rejection, and an internal switched-mode power supply featuring an automatic DC battery backup revert system with an integrated 5A trickle charger. Its modular 2U (19-inch rack-mount) architecture eliminates the need for top/bottom thermal clearance, maximizing rack density in communication consoles and marine vessel radio rooms.

Model Details

• Model Series: MOTOTRBO™ SLR 8000 Series Base Station / Repeater
• Manufacturer Part Number (MPN): T8319A
• TANAPA / Super Tanapa Reference: PMUE4886A (UHF 400–470 MHz) / PMUD3347A (VHF 136–174 MHz)
• Type Approval / Model Type: FAN506B / FAN306B Series
• Form Factor: 2U Rack Mount Standard EIA-310 (19-inch / 483 mm)
• Chassis Construction: Heavy-gauge cold-rolled steel housing with modular internal field-replaceable units (FRUs: Power Amplifier, Power Supply, Modem/Exciter)

Technical Specifications: Motorola SLR 8000 T8319A

Key Features

1. Continuous 100W Heavy-Duty RF Output: 100% duty cycle rating across full temperature ranges (-30°C to +60°C) with no output de-rating required during continuous transmissions.
2. Dual Power Input with Auto-Revert & Battery Charger: Operates on 100–240 V AC line voltage or 12/24 V DC battery plants, featuring an integrated 5 A float charger and millisecond-level switchover to DC battery power upon AC mains disruption.
3. High-Selectivity Receiver Architecture: Advanced front-end pre-filtering provides ≥85 dB intermodulation rejection and >110 dB blocking rejection to prevent co-located transmitter desensitization.
4. Integrated Multi-Protocol Digital/Analog Core: Supports analog conventional, MPT1327, DMR Tier II Conventional, IP Site Connect, Capacity Plus, Capacity Max (DMR Tier III), and Connect Plus trunking.
5. Comprehensive Diagnostic Telemetry: Remote Diagnostics and Control (RDAC) over IP for real-time monitoring of forward/reflected RF power, voltage rails, operational temperatures, and VSWR alarm thresholds.

Part Number Cross-References

• T8319A / T8319 (Base Radio Model Designation)
• PMUE4886A (UHF 400–470 MHz 100W Base Station Unit)
• PMUD3347A (VHF 136–174 MHz 100W Base Station Unit)
• FAN506B / FAN306B (Motorola Type Approval Series)

Marine & Industrial Applications

• Maritime Vessels & Offshore Platforms: Primary commercial SOLAS/non-SOLAS internal UHF/VHF communications repeater for cargo vessels, FPSOs, drillships, and cruise liners.
• Port & Container Terminal Operations: Wide-area dispatch for STS cranes, terminal tractors, and pilot boat-to-shore vessel traffic coordination.
• Petrochemical Refineries & Heavy Industry: High-power signal penetration across dense steel infrastructure and multi-level process plants.
• Mining & Tunnel Operations: Continuous high-power base transmission interfacing with leaky-feeder bi-directional amplifier (BDA) arrays.

Field Engineering Pro Tips:

• Duplexer Isolation Thresholds: When installing internal or rack-mounted external duplexers on a 100W continuous TX system, ensure minimum Tx-to-Rx isolation of ≥85 dB. Anything less will induce receiver desensitization (“desense”), causing dropped packets in DMR slots.
• DC Supply Sizing & Battery Revert: While the unit operates down to 11.0 V DC, RF power output automatically drops from 100 W to 50 W on a 12 V DC bus. To maintain 100 W continuous RF power during mains failure, power the DC terminals from a true 24 V DC battery bank.
• Thermal Management in Enclosed Marine Racks: The SLR 8000 utilizes controlled front-to-back forced-air cooling. Do not mount external patch panels or blind plates directly against the rear exhaust vents. Maintain a minimum rear exhaust clearance of 75 mm (3 inches) inside sealed shipboard consoles.
• Grounding & Surge Suppression: In shipboard or steel superstructure installations, bond the chassis grounding screw directly to the copper master ground bus using minimum 10 AWG (6 mm²) braided tinned copper strap to prevent ground loop noise on the DB25 analog audio paths.

Frequently Asked Questions

Does the Motorola SLR 8000 T8319A operate in continuous 100W duty cycle mode?

Yes. The SLR 8000 is engineered with an industrial-grade power amplifier and high-efficiency heat sink assembly that delivers continuous 100% duty cycle at its full 100 Watt RF output power without thermal throttling.

What is the power output behavior when running on a 12V DC power backup?

When running on an AC supply (100–240 V) or a 24 V DC supply, the repeater delivers full 1–100 W RF power. When running on a 12 V DC supply, the maximum RF output power is limited to 50 W.

Can the T8319A repeater support simultaneous analog and digital radio fleets?

Yes. The SLR 8000 features dynamic mixed-mode operation, automatically switching between analog FM and digital DMR Tier II slots on a call-by-call basis depending on the incoming transmission.

How does the integrated battery charger function on the SLR 8000?

The repeater includes a built-in 5 A trickle/float charger. When connected simultaneously to AC mains and a 12 V or 24 V battery bank, it powers the repeater while maintaining battery float voltage. If AC mains fails, it transitions instantly to battery operation without dropped calls.

What antenna connectors are required for the SLR 8000 repeater?

The SLR 8000 is configured with a 50 Ohm Type-N Female connector for the Transmitter (Tx) port and a 50 Ohm BNC Female connector for the Receiver (Rx) port.