The National Institute of Standards and Technology (NIST) requires a custom software interface to a high-speed arbitrary bit stream generator (ABSG) in order to further the aims of the ac Josephson voltage standard. The ABSG is a custom-built electronics system, which shall output bit streams at 10 Giga bits per second. These bit streams are stored in high speed DRAM in order to meet the speed requirements of the data output. The ABSG is controlled by an embedded PC104 computer running the Linux operating system. There is 128 Mbytes of DRAM in which to store patterns. Any single code (bit stream) must occupy a contiguous section of DRAM. Rudimentary software and hardware exists to load bit streams into memory, and perform all basic hardware operations. The data to be loaded into DRAM must exist either on a local file system (of limited size), or a networked file system. NIST requires a software package including graphical user interface (GUI) to be written for the ABSG to enhance the usability of the system. The package must consist of two parts, code for the PC104 computer to manage resources in the ABSG and a GUI for the end user to control the ABSG. The software system may either be written as custom client/server architecture or as a web-page/web-server system. Note should be taken of the limited processing power of the PC104 computer. If a client/server approach is taken, the GUI shall be written in a standard scripting language that is portable across many host platforms. The GUI should perform the following actions: 1. Load bit streams into DRAM, either from local or networked storage; 2. Delete bit streams from DRAM; 3. Re-arrange patterns in DRAM to maximize availability; 4. Display the loaded patterns; 5. Start/Stop the running of the code; 6. Real-time control over the amplitude, phase, and offset adjustments of the ABSG output; 7. Connection manager to insure that multiple users are not controlling the ABSG simultaneously; 8. Because of the limitations in the design, the DRAM will only be written to by the GUI; DRAM reads will not be allowed. Software developed shall be considered "Open Source," and not subject to copyrights or restrictions. Software should be available to everyone at no cost and NIST will own source codes. Proposals shall be graded on usability of the interface, the portability over many client platforms, and the ability to meet the technical specifications. The vendor must be willing to travel to NIST, Boulder Labs as frequently as needed by NIST staff in order to design, implement and debug the design. Delivery shall be 120 from receipt of order. Vendors shall be evaluated based on demonstrated direct experience with instrumentation interfacing, knowledge of appropriate languages, and demonstrated on-time delivery. Vendors should submit information and references supporting these criteria. Proposals shall be graded on usability of the proposed interface (interface, the portability over many client platforms, and the ability to meet the technical specifications. The scoring will be: Demonstrated experience and references (40%); Technical merit of proposed interface (40 %); Portability of interface (20%). It is not the intent of the Government to issue a separate solicitation for this requirement. Interested sources proposing to supply these items must submit a written qualification statement by fax, clearly establishing capability to meet the above requirements. Faxed quotes are acceptable and should be sent to 303-497-3163. Quotes are required by August 14, 2002. No separate solicitation will be issued. This announcement/solicitation is being issued in accordance with Simplified Acquisition Procedures, FAR Part 13 (NTE $100,000). FAR Clauses in full text are at http://www.ARNET.gov/far/. Agency level protest procedures can be found at http://oamweb.osec.doc.gov/conops/#REFERENCE .

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