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Rincon Research Corporation’s (RRC) second-generation digital L-band software-defined radio (DLSR) family is becoming deprecated. It digitizes multiple L-band inputs for distribution via Ethernet. The DLSR2’s compact 19 inch rackmount (1U) chassis contains the RF components required for connecting directly to antennas or microwave block down converters (S, C, X, Ku, Ka). The integrated, high-performance cavity filter selects the L-band frequency range of 950 MHz to 1750 MHz and rejects out-of-band signals and down-conversion artifacts. The DLSR2 uses multi-rate signal processing techniques to implement up to eight digital down converters (digital sub-band tuners). Each down converter can be configured independently.

The output of each digital down converter (DDC) is distributed over 10 Gigabit Ethernet (10GbE) to individual clients or broadcast to multiple recipients. The DLSR2 supports standard output packet formats such as SDDS (with VLAN and multicast support) and VITA-49.

The DLSR2’s unique wideband snapshot feature provides continuous, high-resolution surveys of the entire digitized input signal (800 MHz wide) to support downlink evaluation and signal discovery/identification. This feature reduces the overall system cost by eliminating the need for external test equipment or for sweeping a narrow-band receiver.

High-precision time tagging is a signature feature of all of RRC’s data acquisition systems. The DLSR2 continues this tradition by producing time-tagged data with sub-1 ns accuracies. Through careful compensation of all algorithmic delays, RRC is able to maintain this level of precision for all digitally down-converted output bandwidths.

Built upon high-performance FPGA technology, the DLSR2 supports seamless in-field firmware upgrades to meet the demands of evolving requirements. RRC’s scalable solution makes it easy to deploy and maintain hundreds of units.


  • L-band analog input (950 MHz to 1750 MHz)
  • 1800 MSPS 10 bit ADC (7.8 ENOB)
  • Programmable attenuator (0 dB to 31.5 dB, 0.5dB Steps)
  • Multiple digital down converter (DDC) configurations provided:
    • 3180: Up to 3 DDCs with 80/40/20/10/5/2.5 MHz bandwidth selection
    • 8140g: Up to 8 DDCs with 40/20/10/5/2.5 MHz bandwidth selection
    • 8180: Up to 8 DDCs with 80/40/20/10/5/2.5 MHz bandwidth selection
    • 21400: Up to 2 DDCs with 400 MHz bandwidth
    • 11240: 1 DDC with 240 MHz bandwidth
    • 11320: 1 DDC with 320 MHz bandwidth
    • 11650: 1 DDC with 650 MHz bandwidth
    • 41160: Up to 4 DDCs with 160 MHz bandwidth
  • All configurations allow independent tuning for each DDC
  • Data output via 10GbE interfaces, except when using the 8140g configuration which supports 1GbE
  • High-precision data time tags provided for DDC and snapshot outputs
    • Tags generated using 1 PPS input
    • IRIG-B, NMEA-0183, or NTP time sources
    • Accepts external 10 MHz reference (optional)
  • Wideband (800 MHz) snapshot capability (up to 2 GByte)
  • Command and control via dedicated Ethernet interface
  • Boot from local flash storage or network file system (NFS)
  • Automatic restoration of a saved configuration after reset, enabling seamless operation without user intervention
  • Redundant, hot-swappable power supplies


For additional information, download the DLSR2 Product Brief and the Wideband Digital-IF Family Product Brief


Orderable Part Numbers:

DLSR2-1U-WS v w x – y z

  • v = Number of analog inputs (1 to 4)
  • w = Number of 10GbE outputs (2 to 8)
  • x = Customization Code, optional (none, A, B, C, D, or request a new modification)
    • no code = standard
    • A = Power detector and second attenuator on each input
    • B = Adds runtime-selectable S-band input filter, 2400 MSPS
    • C = 900 MHz input filter, 1200 MSPS
    • D = Adds 10 port Ethernet switch, rear-panel access
  • y = 10GbE media (L, S, C, or 0)
    • L = Long range fiber SFP+ modules, 1310 nm
    • S = Short range fiber SFP+ modules, 850 nm
    • C = direct-attach passive copper patch cables, Cisco, 3m
    • 0 = no media included
  • z = Boot mode (none or F)
    • no code = NFS boot (flash write-protected)
    • F = Flash booth (flash write-enabled)

Example Configurations:

  • DLSR2-1U-WS12 One L-band input with two 10GbE outputs
  • DLSR2-1U-WS22 Two L-band inputs with two 10GbE outputs
  • DLSR2-1U-WS24 Two L-band inputs with four 10GbE outputs
  • DLSR2-1U-WS36 Three L-band inputs with six 10GbE outputs
  • DLSR2-1U-WS44 Four L-band inputs with four 10GbE outputs
  • DLSR2-1U-WS48 Four L-band inputs with eight 10GbE outputs

Other configurations are possible. Please contact us if you are interested in customizing a product to your specific requirements.

Orders may be placed via e-mail, telephone, fax, or mail.

Commercial Price List available upon request.

Phone: 520-519-3131
Fax: 520-519-3120
Mail: Rincon Research Corporation
Attention: Sales
101 North Wilmot Road, Suite 101
Tucson, AZ 85711

WARNING: Commodities, including associated software, firmware, and technical data, offered for sale on this site are controlled for export by the U.S. Department of State under the International Traffic in Arms Regulations (ITAR) or by the Department of Commerce under the Export Administration Regulations (EAR). Purchaser is required by U.S. law to comply with these regulations. Export, re-export, and retransfer of these commodities by any means without the required licenses or other U.S. Government authorization is prohibited by U.S. law.

Technical Specifications

Number of Inputs

Up to 4

Number of Outputs

Up to 8


-27 dBm (nom)
50 ohm
AC coupled
950 MHz to 1750 MHz
SMA connector

Digital Down Converter Data Format

SDDS or VITA-49, various bandwidths

WB Snapshot

Up to 2 GB (~1 sec)


750 mVpp to 2 Vpp
(1.5 dBm to 10 dBm)
50 ohm, AC coupled,
sine or square wave,
SMA connector


CMOS compatible, 50 ohm, SMA connector


IRIG-B: 0.5 Vpp to 6 Vpp, 50 ohm, 1 kHz AM, SMA
NMEA-0813: RS-232 signal level, LEMO connector, DB9 adapter supplied

Data Connector

10 Gigabit Ethernet, SFP+ modules (included), SR/LR fiber or direct attach copper


10/100/1000 Mbit Ethernet, RJ45


110/220 VAC, 50/60 Hz, 300 W (max)

Power Connector



1U 19” rackmount, 26” depth