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 CatalogFeb-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

6 thoughts on “RDMS™ Rackmount Receivers”

    • 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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