Kenwood TKR-D710 / TKR-D810
The TKR-D710 and TKR-D810 are DMR Tier II conventional repeaters for VHF and UHF that double channel capacity through two-slot TDMA. One 12.5 kHz channel becomes two logical channels without additional spectrum licensing. Mixed DMR/analog FM operation supports existing analog radios alongside new digital ones.
Overview
Commercial and industrial organizations choosing DMR as their digital protocol face an infrastructure question: do they need a DMR-specific repeater, or will a general-purpose unit work? The TKR-D710 and TKR-D810 are purpose-built for DMR Tier II conventional operation, with ETSI TS 102 361 standard compliance and two-slot TDMA that effectively creates two independent radio channels from a single 12.5 kHz license.
The TKR-D710 covers VHF at 136-174 MHz with 5 to 50 W output, operating at 50 W at 50% duty cycle and 25 W at 100% duty cycle. The TKR-D810 covers UHF in Type K (450-520 MHz) and Type K2 (400-470 MHz) at 5 to 40 W. Both support 30 channels with analog channel spacing of 12.5 and 25 kHz, and 12.5 kHz digital. The AMBE+2 vocoder handles digital voice encoding.
Mixed DMR/analog FM operation lets existing analog radios continue to use the repeater while new DMR radios are deployed alongside them. Built-in DMR repeater control with 1 color code handles standard DMR Tier II conventional operation without an external controller. Optional KTI-5 IP interface adds IP console connectivity and conventional IP network support for multi-site operation. Built-in analog DTMF control, RF power-down detection, power supply voltage monitoring, six programmable lighted function keys, programmable auxiliary I/O ports, and a two-digit LED display complete the installation. The 2U rack-mount enclosure measures 483 x 88 x 340 mm at 9.7 kg.
Key Features
Two-Slot TDMA DMR Tier II
DMR Tier II two-slot TDMA creates two independent logical radio channels from a single 12.5 kHz spectrum license. A site with one licensed frequency can support two simultaneous conversations without additional spectrum allocation, which is a significant capacity and cost advantage for organizations paying for spectrum licenses in congested markets.
Mixed DMR and Analog FM Operation
Analog FM and DMR digital share the repeater simultaneously, so existing analog radios continue to work while the organization adds DMR-capable devices. This eliminates the need to declare a cutover date and force all users to upgrade simultaneously, which is the most disruptive and costly approach to digital migration.
KTI-5 IP Console Interface Option
An optional KTI-5 IP interface unit adds IP console connectivity for dispatch integration and conventional IP network support for multi-site operation. Organizations that start with a single-site conventional DMR deployment can add IP multi-site capability later by adding the KTI-5, without replacing the repeater hardware.
AMBE+2 Digital Voice
The AMBE+2 vocoder provides DMR digital voice quality that is consistently intelligible in low-signal conditions where analog FM would produce static. DMR's error correction and digital signal processing maintain audio clarity down to the edge of coverage, which is operationally significant for large industrial sites and transportation corridors.
DTMF Control and Programmable I/O
Built-in analog DTMF remote control enables basic monitoring and auxiliary output control without a network connection. Six programmable lighted function keys provide local status display and control. Programmable auxiliary I/O ports connect door sensors, alarm inputs, and other facility systems for integrated alerting over the radio network.
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