Kenwood NXR-1800E
The NXR-1800E is the UHF counterpart to the NXR-1700E: 40 watts across 400-520 MHz with field-selectable NXDN or DMR Tier II digital capability and full analog FM. Hot standby redundancy, IP remote management via SNMP and HTTPS, a built-in SIP interface, and compatibility with legacy KTI-3 and KTI-5 IP interfaces are all included. Two units per 1U rack space.
Overview
UHF analog systems are the dominant installed base for commercial radio in North America. Organizations on UHF analog face the same migration timing problem as VHF users: the infrastructure investment in repeaters shouldn't need to be repeated when digital becomes the priority. The NXR-1800E is built for UHF operators who need a digital upgrade path without replacing hardware when they're ready to migrate.
The NXR-1800E covers UHF in two frequency variants: Type 1 at 450-520 MHz and Type 2 at 400-470 MHz. Output ranges from 1 to 40 W, running at 40 W at 50% duty cycle and 25 W at 100% duty cycle. Digital protocol is selectable between NXDN Conventional and DMR Tier II via programming, one active at a time, without physical hardware modification. Analog FM channel spacing covers 25 and 12.5 kHz; digital covers 12.5 and 6.25 kHz. Frequency stability is plus or minus 0.5 ppm, with receiver sensitivity of 0.22 to 0.28 uV on DMR and 0.25/0.20 uV on NXDN.
Built-in IP network adapter, SNMP management, HTTPS-secured remote console, and multi-site IP networking across up to 16 sites are standard. A built-in SIP interface in digital mode eliminates external gateway hardware. Compatibility with existing Kenwood KTI-3 (NXDN) and KTI-5 (DMR) IP interface units protects investment for existing NEXEDGE system owners upgrading piecemeal. Hot standby redundancy is configurable. Two units fit in a standard 1U rack space. Thermal-controlled fan, USB-A audio connector, and DB25 external I/O connector complete the physical interface options.
Key Features
Field-Selectable NXDN or DMR Tier II
Digital protocol is selected via programming between NXDN Conventional and DMR Tier II per ETSI TS 102 361. No hardware modification is required to switch protocols, and the decision can be made or reversed after installation as network plans evolve. Both 450-520 MHz and 400-470 MHz frequency variants are available to match the specific license.
IP Management and SNMP Integration
Built-in Ethernet adapter provides IP network connectivity for remote management, monitoring, and programming. SNMP protocol integration places the repeater alongside network switches and servers in an enterprise NMS console. HTTPS-secured remote access provides full management capability without requiring a site visit for programming changes or diagnostics.
KTI-3 and KTI-5 Compatibility
Compatibility with existing Kenwood KTI-3 (NXDN) and KTI-5 (DMR) IP interface units means organizations with installed NEXEDGE infrastructure can replace repeater hardware incrementally without replacing the entire system. The NXR-1800E integrates with existing KTI-5 DMR IP console interfaces and KTI-3 NXDN interfaces already deployed.
Hot Standby and Compact Form Factor
Hot standby redundancy configuration is supported for sites where repeater availability is critical. Two units fit in a single 1U 19-inch rack space at 8.21 x 1.73 x 8.33 inches, making an active/standby pair physically compact. Thermal-controlled fan adjusts cooling based on operating conditions without manual configuration.
SIP Interface in Digital Mode
A built-in SIP interface connects the digital repeater to VoIP and IP phone systems without an external gateway. G.711 audio codec support enables compatibility with standard third-party SIP applications and dispatch console software, avoiding proprietary console hardware requirements for basic radio-to-IP bridge functionality.
Interested in the Kenwood NXR-1800E?
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