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Menu XLRS Shop
  • Products
    • Buying Guide / Product Selector
      • Product general selector
      • Product by funcionality
      • Product by use
      • Product from point of view LOS-NLOS radio link
    • Data Links / Telemetry
      • DL1 V1 Data Link
      • DL1 V2 Data Link
      • BTSD1 V2 RC & Data Link
      • BTSD1 V3 RC & Data Link
    • Remote Controllers
      • XPAD1
      • XPAD2 V3
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    • Ground Controls Stations
      • GCSD4
      • GCSD5
      • GCS Dual
    • Smart Antenna Tracker
    • FPV Analog Video Systems
  • Blog
  • Articles
    • Extraordinary Range
    • Radio XLRS
    • AES 128 Encryption
    • Special Functions
  • Discount Programs
    • Educational discount
  • Where to buy?
    • Distributors and Business Partners
  • Collaboration
    • Become a Distributor
    • Become a Business Partner (For Manufacturers and Integrators)
  • Explore
    • Buying Guides
      • Comparison DL1 – D1
      • Comparison D2 – D3
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📧 Contact Us: sales@dmd.es

💬(+34) 615 18 50 77

XLRS Radio System

Professional radio module for very Long Range up to 200Km and more, in Sub 1Ghz free ISM bands. 

It is the 5th generation of RF modules manufactured by Digital Micro Devices.

Up to 200Km maximum without repeaters for XLRS D4 and D5 systems, which covers almost any need.

The radio module is a fundamental part of the XLRS system.

Information:

– Frequency Stability +-1ppm.

– Multiband ISM. 

  – RF Security.

– RF IP Addressing.

– FHSS.

– Radio XLRS 5G Generation.

Learn more:

– Range RC.

– Range video system.

Frequency Stability ±1ppm 

It is a very important parameter, especially if the temperature of the transmitter and the receiver are very different.

Controlled by TXCO. Better than ±1ppm. 

Only some few low end devices and low power (25mW), use XTAL adjusted to ±5ppm, even so it’s several times better than the RF chips need.

This excellent stability, does that when the systems are far away or receive the signal very weak the devices continue to work correctly. 

The master oscillator can be calibrated.

Systems with TXCO, practically don’t need it. To calibrate, you must have a frequency meter with a rubidium time base or stability better than 0.5ppm. 

The systems with quartz crystal can be adjusted. (Only by qualified technical personnel).

Multiband ISM. 433Mhz to 950Mhz 

 

Free Bands ISM (Industrial Scientific and Medical).

Regulatory compliant: CE Europa, FCC America, ETA India.

Bands 863Mhz, 866Mhz, 868Mhz, 902Mhz, 915Mhz and 950Mhz, available and selectable by software.

433Mhz, 458Mhz optional.

Other bands: 137Mhz, 164Mhz, 205Mhz on demand (RF power 25mW or 1W).

Redundant and Dual band Simultaneous with redundant Smart base station.

Flexible configuratión, multiples possibilities:

Preconfigured for normative CE (Europe), FCC (America), ETA (India), 433Mhz or Custom.

Channelization 25, 50, 100 or 150Khz

Fixed channel or FHSS with selective limit channels

Channel offset  available in 1Khz steps. Max 100Khz.

Baud 25, 50, 100 or 150kb

Adjustable RF power. Max 1W or +30dBm (Max. Limited according normative)

Nivel of Carrier detect adjustable in 1dBm steps

LNA. Low Noise Amplifier selectable.

Blocking RF parameters with hardware password for the normative and security.

RF Security

5G:  Fifth generation of RF modules manufactured by DMD. Evolution of RF modules tested for FPV-UAV since 2007 with more than 1.200hours FPV flight from our I+D technicians.

Stop to the Fail Safe  or failures of RF, If setup is correct, rarely our pilots or some customer has had some fail safe in 12 years.

CRC32: Authenticated and secure RF packages.

RC Security: In addition, the RC (radio control) data packets are digital and are signed with CSUM and filtered for incoherent data. If there is strong RF interference or RF failure it does not deliver random data to the servos. The entry time in Fail safe is configurable.

FHSS: Spectrum extended by frequency hopping, with improved synchronization that allows several channels to interfere and the system to remain synchronized and immune. New system with faster FHSS synch recoveries: <300miliseg. In the XLRS system the pseudo-random jump sequence also has user code. 

Encryption  of RF AES 128b packages. More information…

Password specific in the Radio Frequency network.     

RF IP Addressing. Subnetworks

The RF system uses a 32-bit IP address.

Network and configurable IPs.

List of up to 16 authorized devices (LEA) or authorized subnets, to be used without selecting several UAVs.

Possibility to control “swarms” of Drones or UAvs. (Consult sales@dmd.es).

FHSS, Frequency Hopping Spread Sprectrum

The frequency hop provides more robust communications than with a fixed channel. In many countries its use is mandatory.

Algorithm with improved synchronization that allows several channels to interfere and the system to remain synchronized and immune.

40 hops/seg. Dwell time: 25mSeg.

System with faster synch recoveries: <300miliseg.

Works with 50kb or 100kb of bandwidth.

Configurable start and end channels.

XLRS systems: coding and encryption jump frequency. 10 bytes of code.

Monitoring FHSS status in XLRS transmitters and XLRS receivers and in DMDStudio.

If you need a fixed channel, you can deactivate FHSS.

More info:

– FHSS, Manual XLRS.

– FHSS, wikipedia…

5 Generation XLRS Radio. Features

RF Bands:                                    ISM 863,866, 868, 902, 915, 950Mhz.

Frequency:                                   From 863 to 950Mhz, or 433Mhz.

Other Bands (On demand):      137Mhz, 164Mhz, 205Mhz (RF Power by default: 25mW, Sensitivity: -110dBm | Optional: 1W, -116dBm).

RF Channels:                               Max 255 for band. it depends on the configuration.

Separation channels:                    25, 50, 100 or 150Khz according RF band.

Bandwidth:                                   25, 50, 100 or 150Kb selectable according to baud rate. 

Bandwidth (Radio Modem):      100kb default. Max 150kb.

Modulation:                                   2-GFSK. FHSS 40 hops/sec. or configurable fixed channel.

Selectivity, Adjacent channel:   60dB to 12.5Khz offset. (@LNA Off).

Blocking:                                       86dB to 10Mhz. (@LNA Off). 

Power (According to license):   Configurable, Max. 1W (+30dBm) Limited if standards are used.

Frequency stability:                      TXCO. +-1ppm.

Sensitivity :                                     Max. -116dBm @50kb.

RF input trigger level:                  Configurable in dBm (NCD command).

Working Temperature:        -25ºC to +85ºC.

RSSI:                                            Digital. Calibrated +-1dBm.

RC Packages:                                40 per second for RC and telemetry (25msec latency). 

RF Module:                                     Radio 5G DMD (WMX5H) (No to be confused with 5G of mobile telephony).

Upgradeable / Configurable:            With DMDStudio software through Mini USB port.

More information about radio system…

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