RDMS™ Rackmount Receivers

Quasonix RDMS™ 1U rackmount receiver

The Final Word on Data Integrity

The highest performing telemetry receiver on the market is available in an elegant, compact 1U rack mount package and a 3U touchscreen package with dual, 7-inch full color touchscreens. Configurations include one channel, two channels, or two channels plus combiner; an integrated three-channel spectrum analyzer; automatic AGC zeroing; PCM deframing (header detection/extraction, Sub-Frame ID (SFID) checking/extraction); built-in playback demodulator; combiner IF output; simultaneous TTL and RS-422 outputs; contiguous frequency tuning; adaptive equalizer; and decoding for SOQPSK Space Time Coded and Low Density Parity Check encoded signals.

Key Features

  • Complete Receiver – RF to Bits – a single-box solution that includes downconversion, demodulation, and bit synchronization
  • Data Quality Encapsulation (DQE) to bundle Data Quality Metric (DQM) words with payload data, including a sync word to aid BSS time alignment; built-in real-time DQM display
  • NEW! Best-Channel Selector (BCS) seamlessly selects and the best channel (Channel 1, Channel 2, or Pre-Detection Diversity Combiner) based on DQM, which is then used as the combiner data output
  • Built-in integrated three-channel spectrum analyzer shows frequency domain view for up to three channels simultaneously
  • Multi-Mode diversity combiner supports both Maximal Ratio Combining and Best Source Selection modes and features a revolutionary dynamic time alignment function that increases the allowable time skew between channels by over 1300 nanoseconds—more than 60 bits at high bit rates!
  • Built-in playback demodulator IF inputs for each channel, 75 kHz to 20 MHz, or 70 MHz with selectable SAW filter
  • Simultaneous RS-422 and TTL for all units – no need to order separate output options
  • Tuning Range from 200 MHz to 5250 MHz
  • Versatile Rack-Mount Enclosures – 1U or 3U 19” rack-mount chassis houses one or two receiver channels covering P, lower L, upper L, full S, C, or multiple bands per channel
  • Easy on-site updates of software and firmware may now be installed by the customer on-site via SD card or network
  • Best SOQPSK-TG detection in the Industry, yielding improvements of 2 dB or more over the competition’s single-symbol detectors
  • True multi-symbol trellis detection all three ARTM modes for optimal demodulation
  • 3.5 to 5 dB improvement in PCM/FM performance vs. the best single-symbol demodulators, to within 0.2 dB of the theoretical limit
  • Enhanced Modulation Index Tracking* for PCM/FM maintains superior BER performance even if the received signal’s modulation index varies by as much as 500%, a major breakthrough for tracking legacy analog transmitters (*patented)
  • Phase Noise Compensation optimizes demodulator performance for use with legacy TM packs and transmitters with excessive phase noise
  • Typical noise figure of 3.5 dB bests all other ARTM receivers on the market, hands down
  • Synchronizes up to 100 times faster – and maintains sync at lower signal-to-noise ratios – than any other ARTM demodulator
  • Spectrum analyzer shows frequency domain view for up to three channels simultaneously
  • Automatic AGC zeroing
  • Browser-based remote interface

Related Literature


RDMS™ Rackmount Receiver Manual (Gen 3, R17)Oct-2019

Installation and operation of the Quasonix 3rd Generation Rack-Mount RDMS™ Telemetry Receiver, updated to match RDMS™ System Version 17.

RDMS™ Rackmount Receiver DatasheetOct-2019

Features, specifications, and options of the Gen 3 Rackmount RDMS™ Telemetry Receiver.

Receiver and Transmitter CatalogNov-2020

Catalog of products including Rackmount and Compact RDMS™ Telemetry Receiver, nanoTX™ Telemetry Transmitter, TIMTER™ Telemetry Transmitter, and the Rack-Mount Receiver Analyzer.

RDMS™ Rackmount Receiver Comparison (Gen 2 vs Gen 3)Jun-2015

Feature comparison of Gen 2 and Gen 3 rackmount RDMS™ Receivers, showing the advancements of Gen 3 and enhancements available in the 3U model.

Available on Both 1U and 3U

  • Powerful adaptive equalizer mitigates multipath distortion
  • Optional contiguous tuning from 200 MHz through 2500 MHz and 4400 MHz through 5250 MHz
  • Low Density Parity Check coding, included in all receivers with SOQPSK demodulation, operates with Quasonix LDPC-enabled transmitters to improve link margin by up to 9 dB, while still using 22% less bandwidth than PCM/FM at the same payload data rate
  • Space-Time Coding (STC), included in all rackmount receivers with SOQPSK demodulation, operates with Quasonix STC-enabled transmitters to eliminate the dropouts caused by transmit antenna pattern nulls due to inter-antenna interference
  • Viterbi decoder (k=7, R=1/2), Tier 0, Legacy
  • SAW IF filters (14)
  • Cyber-security features

Available on 3U Receiver

Related Literature


Receiver and Transmitter Low-Density Parity Check GuideSep-2019

This technical guide introduces Low-Density Parity Check (LDPC) encoding, its uses and benefits, the Quasonix products it is available for, and considerations for optimal set-up and use.

Receiver and Transmitter Space-Time Coding DatasheetOct-2018

The Quasonix Space Time Coding Solution eliminates link outages caused by the “two-antenna problem,” improving behavior of received signal power and overall link availability.

Receiver and Transmitter Low-Density Parity Check DatasheetOct-2019

The Low Density Parity Check (LDPC) Forward Error Correction mode improves link margin equivalent to nearly tripling the operating distance on your telemetry link.

RDMS™ Receiver Adaptive Equalizer DatasheetOct-2019

Describes Quasonix’s telemetry receivers’ Adaptive Equalizer Mode, which combats multipath fading.


Quasonix Product Lines

8 thoughts on “RDMS™ Rackmount Receivers”

  1. All receivers work with windows or linux system?
    If yes, how you deal with windows or linux version changes?


    • The operating system in the RDMS™ is Arch Linux, which we custom-tailor to the application. We incorporate updates when they benefit the performance or features of the product.

      The remote control interface is via web browser, which can run under any OS.

    • Power consumption depends on the number of channels in the rack, the demodulators and decoders currently in use, and the data rate. For absolute maximums, you can use the following:
      Single channel: 60 watts
      Dual channel: 80 watts
      Dual channel with combiner: 100 watts

      For 3U units, excluding the -IP option (IP packet output of PCM data), the consumption is 10 watts higher than the figures given above for 1U units.

    • The RDMS™ ships with a comprehensive set of test data loaded onto the unit, and accessible through the browser interface. The AC power supply is CE certified, but the complete unit is not.


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