Shenzhen Guanri Netcom Technologies Co., Ltd.
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DTV Frequency Shift Repeater

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DTV Frequency Shift Repeater
Detailed Description

DTV Frequency Shift Repeater
signal is relayed via radio frequency wave of frequency different from the TV transmitter

The DTV Frequency Shift Repeater (FSR) is designed to solve problems of weak mobile signal, which can expand more coverage than RF repeater and reduce investment for the areas where fiber optic cable is not available.


The repeater is working as a relay and frequency converter between the TV transmitter and receivers during the broadcasting of digital TV signal. It receives low-power TV signal from the TV transmitter via the Donor Antenna, then converts it to specified frequency, and retransmits it via the Coverage Antenna to the weak/blind coverage area. The FSR can avoid self-oscillation which will be easily caused by the RF repeater.


See the overview of Digital TV Repeater .


Application Diagram of DTV FSR



  • Aluminum-alloy casing with IP65 protection has high resistance to dust, water and corroding;
  • Signal of up to 4 channels can be shifted and amplified simultaneously;
  • Linear power amplifier with high gain and low noise is adopted;
  • Filter with high selectivity and low insertion loss eliminates out-of-band interference;
  • Best solution to eliminate self-oscillation problem caused by RF repeater;
  • Omni-directional coverage antenna can be adopted for wider coverage range and easier choice of installation site;
  • RS-232 ports provide links to a notebook for local supervision and to the built-in wireless modem to communicate with the NMS (Network Management System) that can remotely supervise repeater’s working status and download operational parameters to the repeater.



To expand signal coverage or fill signal blind area where digital TV signal is weak or unavailable.

  • Outdoor: Airports, tourism regions, golf courses, tunnels, factories, mining districts, villages, highways…
  • Indoor: Hotels, exhibition centers, basements, shopping malls, offices, parking lots, …

The DTV FSR is mainly applicable to such case:

  • Remote suburb area or village where DTV spectrum deployment is clear and flexible.

In comparison with RFR (RF repeater) and FOR (fiber optic repeater), the FSR has the following benefits and disadvantages:

  • No more self-oscillation and easy to choose installation location;
  • A full 360-degree coverage can be realized.
  • High signal noise may be introduced since the Donor Antenna picks up signal from the air;
  • A certain frequency resource is required to be occupied.



 DTV Frequency Shift Repeater
Working Frequency (customizable)167~223MHz / 470~862MHz
Bandwidth of Each Channel8MHz
Output Power (customizable)33~43 dBm (2~20 W)
Gain≥ 90dB
Gain Adjustment Range1~31dB @ step of 1dB
Frequency Error≤ 0.05ppm
ALC (Automatic Level Control)@ maximum output power: input signal level increases by 10dB, increase of output level will be < 2dB or closed
MER (Modulation Error Rate)≤ 0.8dB and variation < 1dB @ 10dB compression
BER (Bit Error Rate)Degradation ≤ 1*10-2
Voltage Standing Wave Ratio (VSWR)≤ 1.3
Noise Figure≤ 8dB
In-Band Ripple≤ 3dB p-p
Max. Input Level≥ -10dBm
Spurious Emission≤ -36dBm
In-Band Intermodulation Attenuation≤ -40dBc/30kHz
Shoulder LevelPer Channel±4MHz offset from central frequency: ≤ -36dBc/30kHz
Per BandOffset from edge of working band ≥ 8MHz: ≤ -40dBc or ≤ -13dBm/30kHz
Offset from edge of working band ≥ 16MHz: ≤ -60dBc or ≤ -33dBm/30kHz
System Delay≤ 5.0μSec
I/O Impedance50Ω
RF ConnectorN-Type (Female)
Temperature RangeOperation: -25°C ~ +55°C / Storage: -30°C ~ +60°C
Relative Humidity Range≤ 95% (non condensing)
Power Supply (customizable)DC +24V / AC 220V±15%, 50Hz / AC 110V±15%, 50Hz
Backup Power Supply (optional)4 hours
Casing LevelIP65
Dimensions630mm X 400mm X 230mm
Remote Monitoring/Control via NMSSupported


We have important business in the overseas market due to our high quality and reasonable prices. Also,we can supply Repeater according to customers’ requirements!We are specializing in producing many kinds of products,welcome to contact me for the details!We promise that we will offer you best quality and satisfying after-service.Above items are just a part, many more Cisco products are not listed out, please feel free contact us for more details. Thank you for your attention

Company information:
    Our company name is Shenzhen Guanri Netcom Technologies Co., Ltd. Which established in 2007 . We is an exporter of China (Mainland) CCTV System products.    Our products have been sold well in North America South America Eastern Europe Southeast Asia Africa Oceania Mid East Eastern Asia Western Europe! Our company firmly insists on that product quality is the life source of an enterprise.    If we don't have idea of what you're looking for, please call or e-mail with your ideas and we may be able to make you something completely unique!Please vist our website at and use the contact form for a faster response!
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Shenzhen Guanri Netcom Technologies Co., Ltd.
Ms. Chase Wan
3/F, Building R3-B, High-Tech Industrial Park, Nanshan district, Shenzhen 518057 P.R.China

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