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Quasonix 3rd Generation RDMS 2760 Installation And Operation Manual

Compact telemetry receiver
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ISO 9001:2015
Certified
Installation and Operation Manual
rd
TM
3
Generation Compact RDMS
Telemetry Receiver
Quasonix, Inc.
6025 Schumacher Park Dr.
West Chester, OH 45069
11 October 2018
Revision 1.2.1
Specifications subject to change without notice.
All Quasonix products are under U.S. Department of Commerce jurisdiction; not covered by ITAR
No part of the document may be circulated, quoted, or reproduced for distribution without prior written approval from
Quasonix, Inc.
Copyright Quasonix, Inc., All Rights Reserved.

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  • Page 1 Revision 1.2.1 Specifications subject to change without notice. All Quasonix products are under U.S. Department of Commerce jurisdiction; not covered by ITAR No part of the document may be circulated, quoted, or reproduced for distribution without prior written approval from Quasonix, Inc.

  • Page 2: Table Of Contents

    RDMS Serial Control Protocol ....................18 4.3.1 Tier 0 (PCM/FM), Tier I (SOQPSK-TG), and Tier II (Multi-h CPM) Commands ....19 4.3.2 Additional Command Set Details................... 24 4.3.2.1 Antenna Control Unit - ACU ....................24 4.3.2.2 Adaptive Equalizer Control - AEQ ..................25 Quasonix, Inc.
  • Page 3 FM Video Bandwidth Control - FM B ..............51 4.3.2.22 Frequency - FR ......................52 4.3.2.23 Advanced Help Command - HA ................... 52 4.3.2.24 IF Filter Control - IF ....................... 53 Low Density Parity Check – LDPC ................54 4.3.2.25 Quasonix, Inc.
  • Page 4 Version - VE ........................68 4.3.2.43 Viterbi Forget Factor - VFF ................... 68 Performance Specifications ......................... 69 DC Input ............................. 69 RF Frequency Error ........................69 Bit Error Rate ..........................69 Synchronization ......................... 70 IF Module ............................. 72 Maintenance Instructions ........................77 Quasonix, Inc.
  • Page 5 Figure 2: 3rd Generation RDMS™ in 4.00” x 3.00” x 1.00” Compact Housing ........... 10 Figure 3: 3rd Generation RDMS™ in 4.00” x 3.00” x 1.00” Compact Housing with EN (EVTM) Option ..11 Figure 4: MDM-15 Pin Numbers ......................... 12 Quasonix, Inc.
  • Page 6 Table 9: Bit Error Rate Serial Commands ....................80 Table 10: Test Noise Commands ....................... 84 Table 11: Optional 37-Pin Assignments ...................... 86 Table 12: Recommended AM/AGC Settings ....................88 Table 13: PCM/FM Factory Reset Values ....................96 Table 14: SOQPSK Factory Reset Values ....................97 Quasonix, Inc.
  • Page 7 Generation Compact RDMS Telemetry Receiver Table 15: Multi-h CPM Factory Reset Values ..................... 98 Table 16: QPSK Factory Reset Values ....................... 99 Table 17: Multi-h CPM Factory Reset Values ................... 100 Quasonix, Inc.

  • Page 8: Introduction

    Telemetry Receiver 1 Introduction 1.1 Description Generation Compact RDMS™ Telemetry This document describes the installation and operation of the Quasonix 3 Receiver. The RDMS™ (Receiver / DeModulator / bit Synchronizer) is designed to demodulate RF signals in multiple formats: •...

  • Page 9: Nomenclature

    Wide voltage operating range (12 VDC - 35 VDC) For example, a model QSX-RDMS-1-A15-Q0-1110-00-EQ is configured as follows: Table 1: Model Configuration Example Identifiers Description Quasonix product Receiver / Demodulator / Bit Synchronizer Demodulator / Bit Synchronizer Channels 15-pin MDM Male TTL Outputs...

  • Page 10: Detailed Option Descriptions

    1.2.2.3 Adaptive Equalizer - EQ The Adaptive Equalizer option in the Quasonix receiver improves reception in multipath channels by using digital signal processing to compensate for the signal distortion due to multipath. This option is compatible with standard telemetry applications and installations and it works with any brand of transmitter.

  • Page 11: Wide Voltage - Wv

    “Consultative Committee for Space Data Systems, Recommendation for Space Data System Standards, TM Synchronization and Channel Coding, CCSDS 131.0-B-1, Blue Book, September 2003, Section 3.” Wide Voltage – WV 1.2.2.6 This option specifies a wide voltage operating range (12 VDC - 35 VDC). Quasonix, Inc.

  • Page 12: Band Configurations

    1750.0 1850.0 2200.0 Base 2394.5 4400.0 Base 5150.0 400.0 Base Base Base Lower L Upper L Freq. Code Legend: Frequency Gap Standard (Base) Frequency Range Extended Frequency Range (available by selecting Extended Tuning = 1 in part number) Quasonix, Inc.

  • Page 13: Additional Band Codes

    Telemetry Receiver 1.2.3.1 Additional Band Codes Two additional band codes are available: • Band Code 7: (External IF Input) 70 MHz through any SAW filter, 0.075 MHz-20 MHz • Band Code T: 2025.0 MHz to 2110.0 MHz standard range Quasonix, Inc.

  • Page 14: Specifications

    250 kHz, 500 kHz, 1 MHz, 2 MHz, 4.5 MHz, 10 MHz, 20 MHz, 40 MHz. Automatic selection based on data rate, with manual override IF bandwidths Optional: 70 kHz, 1.4 MHz, 3 MHz, 6 MHz, 14 MHz, 28 MHz Quasonix, Inc.
  • Page 15 Up to 100,000 ft. Physical Section Size / Weight 4.00” x 3.00” x 1.00” / 11 oz. RF input: SMA female Connectors IF output: SMA female Baseband: MDM-15 or MDM-37 (-37 option) Power 28 VDC ± 4 VDC, 750 mA typical Quasonix, Inc.

  • Page 16: Installation Instructions

    Figure 2 on the following page. The Compact RDMS™ with the EN (EVTM) option is shown in Figure 3. It includes a male MDM-9 connector for Ethernet. Pin assignments are listed in section 3.3. Quasonix, Inc.

  • Page 17: Figure 2: 3Rd Generation Rdms™ In 4.00" X 3.00" X 1.00" Compact Housing

    Generation Compact RDMS Telemetry Receiver Figure 2: 3rd Generation RDMS™ in 4.00” x 3.00” x 1.00” Compact Housing Quasonix, Inc.

  • Page 18: Figure 3: 3Rd Generation Rdms™ In 4.00" X 3.00" X 1.00" Compact Housing With En (Evtm) Option

    Generation Compact RDMS Telemetry Receiver Figure 3: 3rd Generation RDMS™ in 4.00” x 3.00” x 1.00” Compact Housing with EN (EVTM) Option Quasonix, Inc.

  • Page 19: Thermal

    Primary TTL clock output, Clock+ for RS 422 output Data Out Primary TTL data output, Data+ for RS 422 output RS-232 Ground Ground return for RS-232 control lines; Internally tied to pins 2, 3, and 10 Lock Detect LVTTL lock detector output for all modes Quasonix, Inc.

  • Page 20: Figure 5: Baseband Signal Timing

    By default, the output data is valid on the falling edge of the clock, as shown in Figure 4. The polarity of the output clock may be inverted by use of the “CP 1” command described below. Figure 5: Baseband Signal Timing Quasonix, Inc.

  • Page 21: Pin Assignments For Ethernet Connector

    The RDMS™ with the EN (EVTM) option includes one additional external connector, a male MDM-9. The pin numbering for the male MDM-9 connector is shown in Figure 7. Pin assignments for the MDM-9 are listed in Table Figure 7: MDM-9 Pin Numbers Quasonix, Inc.

  • Page 22: Table 4: Mdm-9 Pin Assignments

    Pin 2 on a standard RJ-45 (Tx - on Ethernet/Rx - on MDM-9) No Connection No Connection Negative leg of a differential pair; Receive data on Ethernet network Pin 6 on a standard RJ-45 (Rx - on Ethernet/Tx - on MDM-9) Quasonix, Inc.

  • Page 23: Operating Instructions

    The following parameters are stored in the unit’s nonvolatile flash memory. The descriptions and default values are listed in Table 6. As with the Quasonix part number ordering method, parameters are typically stored in binary format. That is, “1” designates the feature is enabled, “0” designates the feature is disabled.
  • Page 24 All tracking loops are already optimized for fastest synchronization, and should not be adjusted in any way. If the user knows for sure that the transmit source is digitally synthesized, the tracking should be set to Off, for the minimum acquisition time. Quasonix, Inc.

  • Page 25: Rdms Serial Control Protocol

    • 1 stop bit For setup and configuration via a standard Windows-based PC, Quasonix recommends the application called Terminal, a flexible, full-featured control interface that is included in the RDMS Product CD. Otherwise, one can use HyperTerminal, included with the standard Windows installation (Start -> All Programs -> Accessories ->...

  • Page 26: Tier 0 (Pcm/Fm), Tier I (Soqpsk-Tg), And Tier Ii (Multi-H Cpm) Commands

    AGC auto zero hold threshold 0.000 dB AGC auto zero time constant 0.250 seconds AGC loop total power 13.375 dB Bulk attenuator AGC control enabled, switched out Ctrl Y repeats the command sequence without having to retype the commands. Quasonix, Inc.

  • Page 27: Table 7: Standard And Optional User Commands

    Appendix A, Bit Error Rate Testing Bit Rate Report or set baseband bit Standard For Asynch rate PSK (legacy) modes, BR A and BR B must be specified separately Command Line Reports last 25 commands Standard None History issued Quasonix, Inc.
  • Page 28 Force Lock Diagnostic tool to force the Standard None Indication system to indicate locked or unlocked FM Demodulator Displays and controls FM Standard PCM/FM Settings demodulator settings Frequency Report or set receiver center Standard None frequency Quasonix, Inc.
  • Page 29 Report or set phase noise Standard PCM/FM Compensation compensation state Reset Defaults Restores factory default Standard None parameters for the unit Default is currently the lowest number modulation supported by the transmitter with the selected band and frequency limits Quasonix, Inc.
  • Page 30 Report the current Firmware Standard None (software) version information for the receiver; displays the current application, FPGA, and adaptive equalizer versions Viterbi Forget Report or set the Viterbi Standard PCM/FM Factor forget factor, on a scale from 0.01 – 0.99 Quasonix, Inc.

  • Page 31: Additional Command Set Details

    <p> - Sets AM output polarity to <p> where: <p> - Polarity {0|+} - Normal {1|-} - Inverted S <s> - Sets AM output scale to <s>, -128.0 to 128.0 B <b> - Sets manual mode AM detector bandwidth to <b>, 5.00 to 50000.00 Hz Quasonix, Inc.

  • Page 32: Adaptive Equalizer Control - Aeq

    The AEQ command displays and controls adaptive equalizer settings. AEQ [<e>|T <e>|M <c>|H <t>|R {<e>|S <s>}|C {<e>|R <r>}] <e> - Sets adaptive equalizer enable to <e> where: <e> - Enable 0 - Disabled 1 - Enabled T <e> - Sets equalizer information tracking display to <e> Quasonix, Inc.
  • Page 33 N C <c> - Sets added noise coefficient to <c>, 0.000 to 1.000 N L <l> - Sets added noise limit to <l>, 0.000 to 1.000 AEQ [P {T <t>|S <s>}] P T <t> - Sets power check target to <t>, 0.000 to 16.000 Quasonix, Inc.

  • Page 34: Automatic Frequency Control - Afc

    The Automatic Frequency Control command reports or sets various AFC parameters. AFC [M <m>|H <t>|C {A|<c>}|L <m>|T {L|H} <t>|R <e>|AD <d>|AS <s>] or AFC SYS <d> M <m> - Sets AFC mode to <m> where: <m> - mode Quasonix, Inc.
  • Page 35 AND the Eb/N0 is greater than or equal to the Eb/No where the last trigger occurred, the AFC will 'retrigger' and move the compensated offset to the current, new, offset. Quasonix, Inc.
  • Page 36 AFC tracking auto hold below 10.00000 dB Eb/N0 Compensated frequency offset -0.004606 MHz Detected frequency offset -0.004718 MHz Duty cycle 0.08 % Auto AFC bandwidth is enabled AFC coefficient 0.03573 seconds AFC limit 0.50000 MHz AFC power threshold 0.000 Quasonix, Inc.

  • Page 37: Automatic Gain Control - Agc

    There are no hard value limits for the switch in/out threshold at input power due to variances in other parameters such as gain, calibration, and temperature. It will clip to a minimum or maximum value and report that setting. Quasonix, Inc.

  • Page 38: Automatic Gain Control Data Settings - Agc Data

    <p> - 0.0 to 255.5 dB <a> - Attenuator A, B, C, D, E <v> - Attenuation 0.0 to 31.5 dB or 'MIN' or 'MAX' <o> - Data operation LOAD - Load data ERASE - Erase data Quasonix, Inc.

  • Page 39: Automatic Gain Control Mode - Agc M

    D <d> - Sets deadband to <d>, 0.0000 to 15.9375 dB C <t> - Sets time constant to <t>, 0.100 to 1000.000 ms T <d> - Sets power target to <d>, -100.0 to 13.0 dBm Examples: AGC L P 0.567 Set AGC loop period to 0.567 µs Quasonix, Inc.

  • Page 40: Automatic Gain Control Attenuator Look Up Table - Agc Lut

    Set AGC DSP auto zero time constant to 0.100 seconds Valid range 0.050 seconds to 100.000 seconds 4.3.2.4.7 Automatic Gain Control Zero - AGC Z The AGC Z command sets the AGC Zero operating mode and the value at which zero can be set. Quasonix, Inc.

  • Page 41: High Speed Output Mixer Settings - Ahm

    <f> - Sets mixer frequency for ALL channels to <f>, -46.6667 to 46.6667 MHz <c> <e> - Sets channel <c> mixer enable to <e> where: <c> - Channel to set enable A - Channel DAC A B - Channel DAC B C - Channel DAC C Quasonix, Inc.

  • Page 42: High/Low Speed Outputs

    System Commands H ? for help on help ACU Antenna control unit ADC ADC register UP Unit Parameters VE Version Demodulator/Receiver Commands AEQ Adaptive equalizer DLS Data path lock status PCMFM Commands FM FM demodulator MI Modulation index scale Quasonix, Inc.

  • Page 43: Analog High Speed Output - Aho

    • DP0 - Data path high-speed signal 0 • DP1 - Data path high-speed signal 1 • DP2 - Data path high-speed signal 2 • DP3 - Data path high-speed signal 3 • F0 - Fixed value 0 Quasonix, Inc.
  • Page 44 Source Physical channel 0 downconverted baseband I only Scale - 1.0000 Offset - 0.0000 Polarity - High (+) high speed (video) Channel DAC D Source Physical channel 0 downconverted baseband Q only Scale - 1.0000 Offset - 0.0000 Quasonix, Inc.

  • Page 45: Analog Low Speed Output - Alo

    DP0 - Data path low-speed source 0 • DP1 - Data path low-speed source 1 • DP2 - Data path low-speed source 2 • DP3 - Data path low-speed source 3 • F0 - Fixed value 0 • F1 - Fixed value 1 Quasonix, Inc.
  • Page 46 Polarity - High (+) low speed (ACU) Channel B (Aux Analog A Out) Source Fixed value 0 Scale - 1.0000 Offset - 0.0000 Polarity - High (+) low speed (ACU) Channel C (AGC) Source AGC output Scale - 1.0000 Quasonix, Inc.

  • Page 47: High Speed Digital Output - Dho

    TH2 - Top Hat 2 <s> - Signal source F0 - Fixed 0 F1 - Fixed 1 GC - Generator Clock GD - Generator Data AC - Clock A AD - Data A BC - Clock B BD - Data B Quasonix, Inc.

  • Page 48: Low Speed Digital Output - Dlo

    {1|-} - Active low (inverted) Low Speed Digital Output – DLO 4.3.2.6.4 DLO displays and controls low speed digital output settings. DLO [<c> <s>] - Sets channel <c> to source <s> where: <c> - Output channel UTX - UART Tx Quasonix, Inc.
  • Page 49 DP7 - Datapath 7 DLO [<c> <p>] - Sets channel <c> polarity to <p> where: <c> - Output channel UTX - UART Tx TH3 - Top Hat 3 TH4 - Top Hat 4 TH6 - Top Hat 6 Quasonix, Inc.

  • Page 50: Low Speed Mixer Control - Alm

    Sets a specific channel (c) mixer to enabled or disabled Valid channel mixer values are A, B, C, or D For example: ALM B 1 sets channel DAC B to Enabled ALM D 0 sets channel DAC D to Disabled. Quasonix, Inc.

  • Page 51: Lock Status Command - Al

    BR 0.6 Set bit rate to 600 Kbps Valid range is 0.0080 to 23.0000 Mbps 4.3.2.10 Clock Polarity - CP The Clock Polarity command displays and controls clock output polarity. CP [<p>] - Sets clock component output polarity <p> - Set clock polarity to <p> Quasonix, Inc.

  • Page 52: Downconverting Antenna - Da

    The Differential Decoding command displays and controls differential decoder settings (SOQPSK mode only). Differential Decoding for DPM defaults to Disabled (Off). DD <e> - Sets the differential decoder enable to <e> where: <e> - Enable 0 - Disabled 1 - Enabled Example: Quasonix, Inc.

  • Page 53: Digital Output Muting - Dom

    The DP command displays and controls data output polarity. DP [<p>] - Sets data component output polarity <p> - Set data polarity to <p> where: <p> - Polarity {0|+} - Active high (normal) {1|-} - Active low (inverted) Examples: Quasonix, Inc.

  • Page 54: Data Quality Encapsulation - Dqe

    Example: DQE M 0 Disable data quality encapsulation tracking display DQE M 1 8400 Enable data quality encapsulation tracking display and set display rate to 8400 Valid range is 1 to 60000 ms Examples: Data quality encapsulation disabled Quasonix, Inc.

  • Page 55: Data Quality Metric - Dqm

    The DR command displays and controls derandomizer settings. DR <e> - Sets the derandomizer enable to <e> where: <e> - Enable 0 - Disabled 1 - Enabled Examples: derandomizer disabled DR 0 Set the derandomizer Off (Disabled) DR 1 Set the derandomizer On (Enabled) Quasonix, Inc.

  • Page 56: Digital Status Output - Dso

    Sync detect output = Sync detect active High (+) normal operation 4.3.2.19 Forward Error Correction - FEC Forward Error Correction requires the K7 option in the serial number. The FEC command displays and controls Forward Error Correction settings. Quasonix, Inc.

  • Page 57: Force Lock Indication - Fl

    FL [<l>] - Sets lock state to <l> where: <l> - Lock state 0 - Normal operation 1 - Forced active -1 - Forced inactive Examples: Lock is normal System lock is active Datapath lock is active FL 0 Force lock to Normal Quasonix, Inc.

  • Page 58: Fm Demodulator Settings - Fm

    • The video bandwidth can never be set narrower than the required bandwidth for the specified bit rate. • The IF filter selection, if set to FS A, is wide enough to accommodate the wider FM (video) bandwidth. Quasonix, Inc.

  • Page 59: Frequency - Fr

    Each parameter may be either a value parameter to the command or a command control parameter that specifies the operation of the command. <command> <parameter 1> <parameter 2> ... • In general, a command with no parameters will display the commands associated status. Quasonix, Inc.

  • Page 60: If Filter Control - If

    V command parameter followed by the <a> value parameter the I or O command parameter followed by the <t> value parameter followed by an optional A command parameter 4.3.2.24 IF Filter Control - IF The IF filter control command displays and controls the filter selections. Quasonix, Inc.

  • Page 61: Low Density Parity Check - Ldpc

    M <m> - Sets LDPC mode to <m>. LDPC mode is stored and transferred if the (waveform) Mode changes. where: <m> - LDPC Mode 4k1 – 4k Rate 1/2 1k1 – 1k Rate 1/2 4k2 – 4k Rate 2/3 1k2 – 1k Rate 2/3 Quasonix, Inc.

  • Page 62: Modulation Index - Mi

    AS <s> - Sets acquire mode settling time to <s>, 20 to 10000 ms with a 10 ms resolution P <e> - Sets the modulation index scale parameter (mode and H value) persistence to <e> where: <e> - Enable 0 - Disabled Quasonix, Inc.

  • Page 63: Modulation - Mo

    MO [<m>] - Sets the demodulation mode to <m> where: <m> - Mode {0|PCMFM} - Pulse Code Modulation/Frequency Modulation {1|SOQPSK} - Shaped Offset Quadrature Phase Shift Keying {2|MhCPM} - Multi-h Continuous Phase Modulation {3|BPSK} - Bi-Phase Phase Shift Keying {4|QPSK} - Quadrature Phase Shift Keying Quasonix, Inc.

  • Page 64: Output Clock Measurement - Ocm

    OCM - Shows measured clock rate Example: Component A measured datapath rate 0.999998 - commanded 0.999998 Component B measured datapath rate 0.000000 - commanded 0.000000 4.3.2.29 PCM Decoding - PDC The PCM Decoding command displays and controls PCM digital decoder settings. Quasonix, Inc.

  • Page 65: Receiver Channel Parameters

    The Parameters Erase command erases the stored parameter set for the current mode. It has no impact on the current operating parameter set. If the receiver brick is power cycled, the current operating parameter set is set to defaults. Example: Erasing parameter data... ok Quasonix, Inc.

  • Page 66: All Parameters Erase - Pera

    Enter "YES" to continue!$ Aborted 4.3.2.31 Power Level - PL The PL command reports or sets the current input power level setting. PL [<t>|C <m>|H <e>|S <s>|P <p>|M <t>|F <e>] <t> - Sets power level information tracking display to <t> Quasonix, Inc.
  • Page 67 Power leveling automatic Power leveling active Power level target power 13.00 dB Power level scale 0.00 dB Power level measurement signal only Power level filtering enabled PL 0 Set the current power level information tracking display to Off Quasonix, Inc.

  • Page 68: Phase Noise Compensation - Pnc

    The Query Temperature command reports the temperature in degrees Celsius. Example: FPGA temperature: 41.0°C (85°C Max) Demod temperature: 43.0°C (85°C Max) 4.3.2.34 Signal Degradation Information - SDI The Signal Degradation Information command sets and displays a variety of signal degradation information settings. Quasonix, Inc.
  • Page 69 I <t> - Sets internal threshold to <t>, 0 to 65535, or A for automatic E <t> - Sets external threshold to <t>, 0 to 65535, or A for automatic Examples: SDI enabled SDI datasource Physical input 0 Lock is normal SDI lock is inactive Quasonix, Inc.
  • Page 70 SDI S - Sets signal degradation information source Examples: SDI S P0 Set SDI data source to Physical Input 0 SDI S P1 Set SDI data source to Physical Input 1 SDI S CMB Set SDI data source to Combiner Quasonix, Inc.

  • Page 71: Spectrum Inversion - Si

    Saving parameter data... ok 4.3.2.38 Sync Detect - SYNC The Sync Detect command displays and controls sync detect settings. SYNC <e> - Sets sync detect enable to <e> where: <e> - Enable 0 - Disabled 1 - Enabled Quasonix, Inc.
  • Page 72 [L <l>] - Sets sync detect window length to <l>, 1 to 4095 bits [T <t>] - Sets sync detect correlation threshold to <t>, 0.000 to 100.000 percent Example: SYNC L 317 Set sync detect window length to 317 Quasonix, Inc.

  • Page 73: System Status Tracking - Sys

    BERT (BER command) output. It is volatile and must be reset after every power cycle or mode change. TOD [[mm/dd/yyyy] [hh:mm[:ss]] where: mm - Month 1 - 12 dd - Day of month 1 - 31 yyyy - Year hh - Hour 0 - 23 Quasonix, Inc.

  • Page 74: Show Options - Up

    70 MHz band: 70.0 to 70.0 MHz Playback band: 0.1 to 20.0 MHz Enabled modes: MHCPM SOQPSK PCMFM Pin out: 00 - Standard Options: EQ - Adaptive Equalizer 14 - 14 SAW Filters K7 - Viterbi decode (k = 7 rate = 1/2) Quasonix, Inc.

  • Page 75: Version - Ve

    F <f> - Sets trellis forget factor to <f>, 0.000 to 1.000 Examples: Trellis run length 241.078, increment 14.952 Trellis forget factor 0.800 VF 0.04 Set the Viterbi forget factor to 0.04 VF 0.62 Set the Viterbi forget factor to 0.62 VF V Show current trellis index (where applicable) Quasonix, Inc.

  • Page 76: Performance Specifications

    Table 8: RDMS BER Specifications Maximum E (dB) PCM/FM, Tier 0 SOQPSK-TG, Tier I Multi-h CPM, Tier II 11.0 11.5 12.5 10.0 13.0 13.5 11.0 14.5 14.5 Typical BER performance, plotted in Figure 9, is significantly superior to that tabulated above. Quasonix, Inc.

  • Page 77: Synchronization

    The Compact RDMS™ offers very fast, reliable acquisition, even at very low signal to noise ratio. Synchronization time is a function of modulation type and IF frequency error. Typical SOQPSK results (from 10,000 synchronization trials) are shown in Figure 10. Quasonix, Inc.

  • Page 78: Figure 10: Synchronization Time At Various Signal-To-Noise Ratios

    Generation Compact RDMS Telemetry Receiver Figure 10: Synchronization Time at Various Signal-to-Noise Ratios Quasonix, Inc.

  • Page 79: If Module

    MHz, 14 MHz, and 28 MHz. The measured responses of the optional filters are shown in Figure 14 and Figure 15. Contact Quasonix for information about the optional filters. Based on the receiver’s high level of integration, the proper IF filter is automatically selected based on the current mode and bit rate settings of the demodulator.

  • Page 80: Figure 12: 70 Mhz If Module In 2" X 3" Chassis Saw Filter Responses, Narrow Group (10 Mhz Span)

    Generation Compact RDMS Telemetry Receiver Figure 12: 70 MHz IF Module in 2” x 3” Chassis SAW Filter Responses, Narrow Group (10 MHz Span) Quasonix, Inc.

  • Page 81: Figure 13: Saw Filter Responses, Wide Group (Plotted On 100 Mhz Span)

    Generation Compact RDMS Telemetry Receiver Figure 13: SAW Filter Responses, Wide Group (Plotted on 100 MHz Span) Quasonix, Inc.

  • Page 82: Figure 14: Optional Saw Filter Responses For 70 Khz To 6 Mhz

    Generation Compact RDMS Telemetry Receiver Figure 14: Optional SAW Filter Responses for 70 kHz to 6 MHz Quasonix, Inc.

  • Page 83: Figure 15: Optional Saw Filter Responses For 14 Mhz And 28 Mhz

    Generation Compact RDMS Telemetry Receiver Figure 15: Optional SAW Filter Responses for 14 MHz and 28 MHz Quasonix, Inc.

  • Page 84: Maintenance Instructions

    Generation Compact RDMS Telemetry Receiver 7 Maintenance Instructions The Compact RDMS™ requires no regular maintenance, and there are no user-serviceable parts inside. Please consult the factory for any maintenance, upgrade, or repair requirements. Quasonix, Inc.

  • Page 85: Product Warranty

    Generation Compact RDMS Telemetry Receiver 8 Product Warranty The Compact RDMS™ carries a standard parts and labor warranty of one (1) year from the date of delivery. Quasonix, Inc.

  • Page 86: Technical Support And Rma Requests

    Telemetry Receiver 9 Technical Support and RMA Requests In the event of a product issue, customers should contact Quasonix via phone (1-513-942-1287) or e-mail (support@quasonix.com) to seek technical support. If the Quasonix representative determines that the product issue must be addressed at Quasonix, a returned materials authorization (RMA) number will be provided for return shipment.

  • Page 87: Appendix A - Bit Error Rate Testing

    Provides help for using the bit error rate commands Help Bit Error Rate Report bit error rate status Status Examples: Measurement disabled Sequence is PN15 Continuous measurement Gating repeat Error interval seconds BERT display tracking Normal at 0 ms Quasonix, Inc.
  • Page 88 Display current BERT measurement status in a specific style Measurement BER [M <s>|?] Status Examples: BER M ? Display style help BER M N N indicates Normal BER M W W indicates Wide BER M CSV CSV indicates Comma Separated Values Quasonix, Inc.
  • Page 89 BER T C Set bit error measurement type to Continuous BER T 2.333 Set BERT time limit to 2.333 seconds BER T B 1 Set bit limit to 1 bit BER T E 0.5 Set error limit to 0.5 errors Quasonix, Inc.
  • Page 90 PCMFM$ber t t 5 Time limit 5 seconds PCMFM$ber r Measurement enabled, running PCMFM$ber d n Measurement enabled, running Sequence is PN15 Time limit 5 seconds Gating repeat Error interval seconds BERT display tracking Normal at 0 ms PCMFM$ Quasonix, Inc.

  • Page 91: Test Noise Commands

    Turns the test noise output Enabled or Disabled Noise AWGN <e> <e> - Sets AWGN enable to <e> If 'e' is 0, test noise is Off/Disabled If 'e' is 1, test noise is On/Enabled Example: AWGN 1 AWGN enabled Quasonix, Inc.
  • Page 92 Name Description AWGN [P <p>] Set Test Noise Level Sets the test noise power level in dB E Range for p is -10.00 dB E to +50.00 dB E Example: AWGN P 42.00 AWGN power 42.00 dB E Quasonix, Inc.

  • Page 93: Appendix B - Pinouts For Optional 37 Pin Connector

    Lock Detect LVTTL lock detector output for all modes RS-232 Tx Output RS-232 responses to host controller Clock B Out Secondary TTL clock output, Clock+ for RS-422 output Data B Out Secondary TTL clock output, Data+ for RS-422 output Quasonix, Inc.
  • Page 94 Ground for Secondary TTL output, Data- for RS-422 output Clock C Return Ground for Tertiary TTL output, Clock- for RS-422 output Data C Return Ground for Tertiary TTL output, Data- for RS-422 output Factory use only – Do Not Connect Quasonix, Inc.

  • Page 95: Appendix C -Recommended Am And Agc Settings For Acu Interfaces

    1000 / ScanRate 5 * ScanRate Conical scan 850 / ScanRate 5 * ScanRate E-scan 1000 / ScanRate 10 * ScanRate E-scan 850 / ScanRate 10 * ScanRate In Table 12, ScanRate is the antenna scan rate in Hz. Quasonix, Inc.
  • Page 96 At the recommended settings, AM phase delay is approximately 30 degrees for typical conical scan and e-scan scan rates. If AGC Compensation is enabled, the AGC Time Constant and AM Bandwidth should both be set only as indicated in Table 12. Quasonix, Inc.

  • Page 97: Appendix D - Phase Noise Compensation

    The Phase Tree shown in Figure 17, shows all of the possible paths the phase trajectory can take over a period of seven bits. Figure 18 shows the two unique paths, based on whether the second bit is a 1 or 0. Figure 17: Ideal PCM/FM Phase Tree (h = 0.7) Quasonix, Inc.

  • Page 98: Trellis Demodulation Summary

    High phase noise can reduce the trellis detection gain because phase noise corrupts the tree. The following figures illustrate the differences in trellis detection gain depending on the amount of phase noise introduced. Figure 19: Trellis Detection Gain with Zero to Minimum Phase Noise Quasonix, Inc.

  • Page 99: Phase Noise Impact

    The demodulator is struggling to lock, even with good Signal to Noise Ratio (SNR). ("Good" SNR means the Quality bar is above one-quarter height.) • The eye pattern NEVER looks “clean,” as in Figure 21 • Symptoms get worse when the transmitter is under vibration • Symptoms get worse at low bit rates Quasonix, Inc.

  • Page 100: Know Your Transmitter

    If you know the brand and type of transmitter, these tips can help determine when to use PNC. If your transmitter was manufactured by these companies, PNC should be OFF: • Quasonix – guaranteed • Nova Engineering – highly likely •...

  • Page 101: Appendix E - Pcm Framer/Deframer Function

    14 Appendix E - PCM Framer/Deframer Function Quasonix RDMS™ receivers recognize PCM frames as defined by IRIG 106-17 Chapter 4 and Appendix 4-A. The receiver can provide basic processing of a large subset of possible frame configurations, including sync word detection, subframe ID checking, and data extraction from the frame structure (without decommutation).

  • Page 102: Pcm Deframer

    BERT to measure link performance. The RDMS™ receiver can output PCM frame lock and/or SFID valid indications on the DEMOD_LOCK and/or ONES_DETECT back-panel outputs. Refer to the RDMS™ data sheet for more information about these outputs. Quasonix, Inc.

  • Page 103: Appendix F - Factory Reset Values

    DQ Encapsulation (if available) Disabled AGC Scale Derandomizer Disabled AGC Time Constant Differential Decoder AGC Zero Mode Manual Modulation Scaling Acquire AM Bandwidth Modulation Persist AM Polarity Normal IF Filter Auto AM Scale Video De-emphasis AGC Compensation Enabled Quasonix, Inc.

  • Page 104: Table 14: Soqpsk Factory Reset Values

    Normal Derandomizer Disabled Differential Decoder Enabled IF Filter Auto Downconvert Antenna Disabled AGC Zero Mode Manual Convolutional Decoder Lock Output Polarity Active High NRZ Encoding Output Control Default Output Muting Disabled Phase Noise Compensation Disabled Tape Output Disabled Quasonix, Inc.

  • Page 105: Table 15: Multi-H Cpm Factory Reset Values

    Data Polarity Normal Derandomizer Disabled Differential Decoder IF Filter Auto Downconvert Antenna Disabled AGC Zero Mode Manual Convolutional Decoder Lock Output Polarity Active High NRZ Encoding Output Control Default Output Muting Disabled Phase Noise Compensation Disabled Tape Output Disabled Quasonix, Inc.

  • Page 106: Table 16: Qpsk Factory Reset Values

    Derandomizer Disabled Differential Decoder IF Filter Auto Downconvert Antenna Disabled AGC Zero Mode Manual Convolutional Decoder Disabled Lock Output Polarity Active High NRZ Encoding NRZ-L Output Control Default Output Muting Disabled Phase Noise Compensation Disabled Tape Output Disabled Quasonix, Inc.

  • Page 107: Table 17: Multi-H Cpm Factory Reset Values

    Clock Polarity Normal Data Polarity Normal Derandomizer Disabled Differential Decoder IF Filter Auto Downconvert Antenna Disabled Enabled Convolutional Decoder Lock Output Polarity Active High NRZ Encoding Output Control Default Output Muting Disabled Phase Noise Compensation Disabled Tape Output Disabled Quasonix, Inc.

  • Page 108: Appendix G - Acronym List

    Data Quality Metric FPGA Field Programmable Gate Array Intermediate Frequency Internet Protocol kbps Kilobits per second Kilohertz Liquid Crystal Display LDPC Low Density Parity Check Mbps Megabits per second Snap on subminiature connector MHCPM multi-h Continuous Phase Modulation Megahertz Quasonix, Inc.
  • Page 109 Shaped Offset Quadrature Phase Shift Keying Shaped Offset Quadrature Phase Shift Keying –Telemetry Group SOQPSK-TG Space-Time Coding Tracking Loop Transistor Transistor Logic User Datagram Protocol UQPSK Unbalanced Quadrature Phase Shift Keying Universal Serial Bus Voltage Alternating Current Voltage, Direct Current Wide Area Network Quasonix, Inc.

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