Wide Band Systems, Inc. When you consider advanced DFD/IFM technology, consider that we…. · Developed the 2:1 ratio correlator array, extending DFD performance to lower RF SNR and improving pulse on pulse, pulse on CW trigger accuracy · Developed a Digital Temperature Correction Technique, in place of archaic oven stabilization · Developed the RF to video digitizer, eliminating outmoded DC restoration design · Developed (and holds the patent on) the Coherent Threshold, providing the DFD with a real time, leading edge, pulse on pulse threshold – after limiting – and providing a functional Multipath Blanking technique · Developed (and holds the patent on) the Associative Processor, providing the DFD with a real time, leading edge, pulse on pulse threshold- after limiting- and providing a functional Multipath Blanking technique. · Developed the 40MHz clocked sampled DFD, allowing effective pulse on pulse processing in dense signal environments · Provide “turnkey” IFM Receiver Systems, solving all of the technical issues of filtering, thresholding, estimation of RF frequency, RF amplitude, Pulse Width, and Time of Arrival, in a signal unit W ide Band Systems is the only organization dedicated to the design, development, and production of modern wide band receivers; this is not one of our product lines, it is our one and only product and we are dedicated to continuous improvement of this technology. Wide Band Systems is the first source of advanced technology wide band DFDs and IFM Receivers. Summary of existing product line parameters Input Frequency Resolution Dynamic Range (MHz) Range, (GHz) dB 0.05-0.5 0.75-1.25 0.75-1.25 0.5-1.1 0.5-2 1-7.5 1.2-1.7 2-4 2-4 2-4 2-6 2-6 2-6 2-6 2-6 2-8 3.8-8.2 5-7 8-10 6-18 6-18 6-18 7-18.2 7.5-18 7.5-18 8-18 8-18 2-18 RF Pulse Amplitude Width Data (nS) DC Power (W) (Typ) 0.5 0.534 0.534 0.25 0.5 2.0 0.5 0.625 0.3125 0.625 1.25 1.25 1.25 1.074 1.25 -70 to 0 -60 to +10 -60 to +10 -60 to +10 -60 to +10 -60 to 0 -20 to +6 0 to +8 -65 to +10 -40 to +10 -65 to +10 -60 to +10 -60 to +10 -65 to +10 -65 to +10 Yes Yes Yes No Yes No No No No Yes No No No No Yes 100 to CW 50 to CW 50 to CW 100 to CW 50 to CW 85 to CW 100 to CW 100 to CW 40 to CW 100 to CW 50 to CW 50 to CW 100 to CW 25 to CW 50 to CW 31 31 31 16 31 18.1 5.3 11.2 16 31 16 16 16 12.5 31 1.25 0.3125 0.3125 3.0 3.0 3.0 3.0 3.0 3.0 11.3 0 to +8 -65 to +10 -65 to +10 -60 to +10 -60 to +10 -60 to +10 -60 to 0 -58 to +10 -17 to +10 -6 to +4 No No No No Yes Yes No No No No 50 to CW 40 to CW 40 to CW 50 to CW 50 to CW 50 to CW 85 to CW 100 to CW 100 to CW 100 to CW 11.2 16 16 16 31 31 18.1 13 13 10 2.5 -60 to +15 No 40 to CW 13 C Dimensions (inches) Weight (lbs) VME 19 inch Rack 7 x 10.5 x 3 6 x 7.3 x 1 VME 6 x 8 x 2.5 5 x 5 x 0.55 7 x 12 x 2 7 x 12 x 2 7.5 x 10.5 x 3 7 x 12 x 2 6.2 x 7.3 x 0.8 6 x 7.3 x 1 6 x 7.3 x 0.8 7 x 10.5 x 3 VME 7 x 12 x 2 7 x 12 x 2 7 x 12 x 2 7 x 12 x 2 7 x 10.5 x 3 19 in 3U Rack 6x8x2 7 x 12 x 2 7 x 12 x 2 5 x 8 x 1.8 VME 10 x 6 x 1.5 34 12.5 4 12.5 9 1.25 9 9 12.5 9 3.3 4 2.8 12.5 12.5 9 9 9 9 12.5 34 9 9 9 4 12.5 5 onsider this partial list of IFM/DFD productsdesigned, developed, and manufactured at Wide Band Systems, Inc. Digital Overview of advanced Digital Frequency Discriminators Frequency Discriminators ide Band Systems, Inc. offers a wide variety of Digital Frequency Discriminator designs, responding to system requirements for bandwidth, frequency accuracy, and resolution. All of our designs employ 2:1 ratio correlator arrays, providing the highest phase margin. This allows our DFDs to operate at a reduced RF SNR and in the presence of multiple simultaneous signals, in situations where the older 3:1 and 4:1 designs would produce errors. Our microwave circuits are broadband stripline designs; our logical processing is in CMOS TTL, using standard ICs. System requirements have also demanded a wide variety of triggering circuits; these have included the internal detector threshold, the external trigger (with controlled RF to trigger delay), the synchronously clocked DFD (at clock rates to 40MHz), and the asynchronously clocked DFD. The diagram above illustrates an asynchronously clocked DFD, which accomplishes a frequency measurement and RF SNR estimate every 25nS. The sequence of frequency measurements and RF SNR estimates is provided to an Associative Processor, which determines whether a new signal has occurred, then latching the frequency data and setting the Data Ready Flag. This design, patented by Wide Band Systems, provides a leading edge noise riding, pulse on pulse, pulse on CW trigger without requiring log amplitude data. ●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●● Digital Frequency Discriminator Designed for an airborne RWR, this clocked DFD set employs a dual seven correlator array to provide two tracking channels over 2-6GHz. Measuring just 7.3 x 6 x 1.4 inches, this unique design sets a new standard in size and Designed for a fighter aircraft, this L-band DFD employs an RF limiting amplifier driving a five correlator array over the 0.5-1.2GHz band, providing a 10-bit frequency data word. At a size of 5 x 5 x 0.55 inches, it represents the current state of the art in DFD miniaturization. Designed for a shipboard application, this DFD employs an eight correlator array to “stare” over the full 2-18GHz band, producing a 14-bit digital frequency data word. IFM The “turnkey” approach to IFM Receiver Design Receivers IFM Receiver Basic Block Diagram he wide band IFM Receiver design integrates a Digital Frequency Discriminator with RF amplitude digitizing (8-bit or 10-bit) circuits and threshold circuits to provide a single, integrated assembly that includes all of the necessary circuits to provide RF frequency, RF amplitude, RF envelope pulse width, and Time Of Arrival data. It may also include FMOP, PMOP, POP, CW Detection, and POCW flag outputs. These receivers employ an internal 40MHz clock, which may be synchronized to an external 5MHz or 10MHz reference, improving TOA accuracy and allowing the synchronization of multiple receivers. Pulse width processing is via a Standard Video Processor which examines a running serial sequence of amplitude data to locate the leading and trailing edges of the RF envelope; this adapts automatically to fast or slow RF envelope rise and fall times. Threshold is based on an internally sampled RF SNR estimator, which ignores broad band noise inputs. This threshold may also be programmed to a selected RF power level. In addition to the RF input threshold power level, the CW time definition, TOA resolution, and other parameters are also programmable via the serial RS-422/485 interface. ●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●● IFM Receiver Designed for a mobile ESM system application, this L band receiver provides RF frequency, amplitude, pulse width, and TOA data. This receiver incorporates both an external programmable threshold and an internal automatic noise riding threshold. This IFM receiver is provided in three bands: 0.5-2GHz, 2-8GHz, and 8-18GHz. As in the ESM application, this receiver provides RF frequency, amplitude, pulse width and TOA data on a pulse by pulse basis. It also identifies FMOP, PMOP, and CW signal events. Designed for shipboard application, this IFM Receiver covers the 6-18GHz band, providing parametric data through a fast FIFO buffer, allowing a fast receiver to interface to a slower computer. IFM/DFD Design Summary ●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●●● ide Band Systems` main goal is to DFD Frequency Accuracy vs RF SNR provide reliable and produceable IFM/DFD designs which both meet the specifications and satisfy the system design objectives. To accomplish this, extensive design analysis of the basic unit configuration is performed which permits us to accurately predict the unit performance. The chart at right compares the design analysis performance of a 2-6GHz DFD at low RF SNR to the actual performance of a finished unit. This design analysis is followed by the comprehensive computer controlled extensive use of CAD (including testing of the finished unit. The end MICAD) of the stripline circuits, result is the reliable production of the ORCAD of the CCA, AUTOCAD of most technically advanced DFD/IFM the physical structure, and, finally, designs available for your system. How to get more information… To learn more about our capabilities to meet your requirements, or to request applications assistance, or system performance modeling, please get in touch with us soon. 389 Franklin Avenue ● Rockaway, NJ 07866 Telephone (973) 586-6500 ● Fax (973) 627-9190 www.widebandsystems.com 699-1 Copyright © 1999 Wide Band Systems, Inc. Printed in U.S.A.
