NASA, George C. Marshall Space Flight Center, Procurement Office, Marshall Space Flight Center, AL 35812

70 -- HARDWARE SOL 8-P-6-16-B1956 POC Contact, GP22L/Janice M. Stewart,Contract Specialist, 205-544-6093,or, GP22C/Teresa A. Foley,Contracting Officer NASA/MSFC plans to issue a Request for Quotation (RFQ) for Hardware for ISSA Structural Test Article Modal Testing- -NASA/MSFC intends to purchase from PCB Piezotronics, Inc. Depew, NY -- the following: Item 1 - 8 Channel Signal Conditioning Board Model 537001 or equal, with the following salient features -- Electrical (a) -- Provision for transducer (specifically accelerometers) excitation, signal conditioning, and a unique address for message routing -- (b)-- Condition input signals from transducers (specifically accelerometers) by going through a differential input amplifier, binary gain amplifier, decimal gain amplifier, and filter --(c)-- Provision for gain steps of 1 through 800 with a tolerance of +/-1 % --(d)-- Printed circuit board must be capable of being installed in the type plug-in sockets characteristic of PCB Model 537B Data Harvester Signal Conditioner -- Quantity 16 ea -- Item 2 - Fixed and autoranging gain PC Board, PCB Model 537035, or equal with the following salient features -- Electrical (a)--Provision of overload detection circuitry for monitoring of positive and negative signal excursions --(b)-- Provision of automatic selection of the maximum gain value for each channel to prevent an overload condition -- (c)--Preset signal thresholds of +/- 5 V which can be sensed by digital logic -- (d)--Printed circuit board must be capable of being installed in the type plug-in sockets characteristic of PCB Model 537B Data Harvester Signal Conditioner -- Quantity 16 ea -- Item 3 - Low pass filter PC board, PCB Model 537056, or equal, with the following salient features -- Electrical --(a)-- Contains two digitally controlled second-order continuous analog filters and one seventh-order switched-capacitor filter that can interface with a digital clock signal input to control cutoff frequency -- (b)--Contains a continuous smoothing filter to maintain a -72dB signal-to-noise ratio --(c)--Switched-capacitor filter is to have 88dB per octave rolloff, +/- 5% tolerance of cutoff frequency, ( -72dB Total Harmonic Distortion at 80% of cutoff, and programmable from 4 Hz to 20 kHz -- (d)--Continuous filters are to have 12 dB per octave rolloff and be current controlled within a range of 30 Hz to 100 kHz --(e)--Printed circuit board must be capable of being installed in the type plug-in sockets characteristic of PCB Model 537B Data Harvester Signal Conditioner -- Quantity 16 ea -- Item 4 - ICP Accelerometer, PCB Model 333A, or equal, with the following salient features -- Dynamic Performance (a) 100 mV/g voltage sensitivity (b) At least +/- 50g peak measurement range (c) At least 0.5 - 4000 Hz frequency range with +/- 5% error (d) At least ) 25kHz mounted resonant frequency (e) At least +/- 5 degree or lower phase response from 1.0 - 4000 Hz (f) At least 0.001 g rms or lower broadband resolution from 1.0 - 10 kHz (g) At least 5% lower transverse sensitivity--Environmental--At least +/- 7000 g peak shock limit or higher -- Electrical --(a) 18 - 28 VDC excitation voltage (b) 2-20 ohms constant current (c) (100 ohms output impedance (d) 8 - 12 VDC output bias -- (e) (85 microg/square root Hz spectral noise at 1 Hz -- Mechanical (a) PZT/Shear sensing element--(b) 0.33 in x 0.38 in (diameter by height)--(c) 0.1 oz weight--(d) TO-5 three pin electrical connector compatible with PCB Model 080M181 Triaxial Mounting Socket cable -- (e) Capable of being installed in a PCB Model 080A55 Triaxial Mounting Base--Quantity 85 ea-- This procurement is being conducted under the Simplified Acquisition Threshold (SAT) portion of the Federal Acquisition Streamlining Act (FASA)-- Note: This procurement is sole-source based on system compatability requirements and predominant experience -- Interested firms have 15 days from the publication date of this synopsis to submit in writing their qualifications/capabilities in the critical areas mentioned above -- Such qualifications/capabilities will be used solely for the purpose of determining whether or not to conduct this procurement on a competitive basis -- Responses received after the 15 days or without the required information will be considered nonresponsive to the synopsis and will not be considered -- A determination by the Government not to compete this proposed contract, on a full and open competitive basis, based upon responses to this notice, is solely within the discretion of the Government -- See Numbered Note 22 -- Oral communications are not acceptable in response to this notice -- Responses must be submitted in writing -- Transmission by facsimile to 205-544-6093 or by Internet e-mail to janice.stewart@msfc.nasa.gov is acceptable -- The solicitation and any related documents to this procurement will be available over the Internet -- These documents will be in ASCII format and reside on a World-Wide Web (WWW) server, which may be accessed using client browsers, such as, MOSAIC -- The WWW address, or URL, of the MSFC Procurement home page is: ''http://procure.msfc.nasa.gov''. 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