Name: PR900 Digital Repeater
Brand: Caltta Technologies Co., Ltd.

Features of PR900 Digital Repeater

Ultra Slim Design
PR900 adopts 1U design, making the height half of conventional repeaters and saving space when installing.
Easy Operation for Users
PR900 adopts a 2.0-inch HD color screen, making it more convenient for users to review information and operate.
Better Audio Quality
Digital voice processing reduces the impact of environmental noise on voice quality, making the call voice clearer. Thus, it is suitable for complicated and noisy work scenarios with constant changes.
Digital-analog Compatible
Smart digital-analog automatic detection mechanism ensures legacy analog radios can still be used under our PR900, to guarantee customers' historical investment to the greatest extent.
Flexible Networking
PR900 analogue repeater supports flexible networking based on diversified scenarios: IP connection extends coverage; simulcast fulfills large coverage with fixed frequency; active link offers wide coverage; ECS(Enhanced Conventional System) realizes dynamic channel allocation.
High Security and Reliability
Professional encryption algorithms as well as service protection mechanisms such as authentication and remote stun, help to ensure the data security and reliability of the DMR system and the end user's life safety to the utmost extent.
Rich Interfaces
PR900 supports the access of the remote microphone and provides a customization interface to realize more third-party extension services.
High Spectrum and Power Efficiency
With DMR two-slot TDMA technologies, PR900 allows a single carrier with a bandwidth of 12.5 kHz to support two independent calls, with each time slot occupying a bandwidth of 6.25 kHz, which reduces transmission time in half and saves battery power consumption by 40%, effectively prolonging the standby time of DMR radios.
DMR Standard
As Caltta is a member of the DMR Association, the PR900 repeater is fully compliant with DMR standard and can interconnect with any other DMR system and radios that comply with DMR standard.
Rich Services
Besides basic PTT services, PR900 also supports text messages, status messages, map-based location services, and call recording to enrich the user experience.
Flexible Customization
Supports customization according to customer needs.
Fulfill customer expectations using personalization.

Specifications of PR900 Digital Repeater

General
Digital Protocol	ETSI TS 102 361-1, -2, -3
Frequency	UHF1: 400-470MHz VHF: 136-174MHz
Channel Capacity	1024
Channel Spacing	12.5kHz/25KHz
Max Duty Cycle	100%
Operating Voltage	AC100-240V @50/60Hz DC13.6V±15%
Backup Power Supply	Support
Size (HWD)	436×44.5×366.4mm (Standard 19-inch 1U height frame)
Screen	2.0-inch HD LCD, 320×240, 10 status LEDs
Weight	8.5Kg
Receiver
Sensitivity(Analog Typical)	0.14uV（12dB SINAD）
Sensitivity(Digital Typical)	0.14uV（5% BER）
Frequency Stability	±0.5ppm (Max)
Adjacent Channel Selectivity	65dB@12.5KHz/75 dB@25KHz (TIA603D)
Adjacent Channel Selectivity	65dB@12.5KHz/75 dB@25KHz (ETSI)
Intermodulation	75dB (TIA603D)
Intermodulation	70dB (ETSI)
Spurious Rejection	80dB (TIA603D)
Spurious Rejection	80dB (ETSI)
Blocking or Desensitization	98dB (TIA603D)
Blocking or Desensitization	95dB (ETSI)
Hum and Noise	40dB (Min)
Audio Distortion @ Rated Audio	≤3% (Max)
Audio Response	+1～-3dB(TIA603D)
Conducted Spurious Emission	-57dBm (TIA603D)
Transmitter
Frequency Stability	±0.5ppm
Power Output	1W - 50W (UHF1/VHF)
FM Modulation	12.5KHz: 11K0F3E / 25KHz: 16K0F3E
4FSK Digital Modulation	12.5KHz Data Only: 7K60FXD
4FSK Digital Modulation	12.5KHz Voice and Data: 7K60FXE
Conducted/Radiated Emission	-36dBm≤1GHz; -30dBm>1GHz
Modulation Limiting	±2.5KHz @12.5KHz/±5.0KHz @25KHz
FM Hum and Noise	40dB (Min)
Adjacent Channel Power	60dB @12.5KHz/70 dB @25KHz
Audio Distortion @ Rated Audio	≤3% (Max)
Audio Response	+1～-3dB(TIA603D)
Environmental
Operating Temperature	-30℃ ~ +60℃
Storage Temperature	-40℃ ~ +85℃