Attach_1_CCA-Backplane_PWB_Production_SOW_(Rev1).pdf

RA133W-15-RP-0082

Attachment 1

PERFORMANCE SPECIFICATIONS

1.0 INTRODUCTION

1.1 Background

NEXRAD (Next-Generation Weather Radar) is a network of high-resolution Doppler weather radars operated by the National Weather Service (NWS), Federal Aviation Administration (FAA) and U. S. Air Force (USAF). NEXRAD detects weather events and is the primary detection system used by the NWS to support issuance of severe weather warnings, and is used by the FAA and USAF to support safety of flight operations.

1.2 Purpose

The NWS intends to modernize the WSR-88D transmitter control and monitoring system. The current four card design is based on mid 1980’s TTL technology. The current circuit cards and backplane are becoming obsolete. The NWS requirement is the design and development of a single circuit card to replace the four current circuit cards, and the design and development of a Printed Wiring Board (PWB) to replace the current wire-wrapped backplane circuitry. The physical relationship between the four current circuit cards and the backplane is that the four cards (Figure 1) plug into the four 300 pin connectors shown along the left edge of the connectorized side of the backplane (Figure 4).

1.3 Control and Monitoring Circuit Cards

The Control and Monitoring circuit cards consist of the Control Adaptor, Control Logic, Control Interface, and Remote Monitoring Subsystem (RMS) Interface. The part numbers for these four circuit cards are; 706J229G01, 706J225G01, 706J221G01, and 706J223G01. The design of these existing circuit cards is specified in Attachment 2. Operation of the transmitter is controlled by the control and monitoring circuit cards. These circuits provide front panel metering for voltages and currents, fault monitoring status indications, transmitter status, and external interfacing with the main data processor. Timing triggers and remote control commands received by the main data processor are distributed in the transmitter by the control and monitoring circuit cards and associated backplane.

Figure 2: Circuit Card Nest Figure 1: Single Control & Monitoring Circuit Card http://en.wikipedia.org/wiki/Doppler_effect http://en.wikipedia.org/wiki/Weather_radar http://en.wikipedia.org/wiki/Weather_radar http://en.wikipedia.org/wiki/National_Weather_Service

1.4 Transmitter Backplane

The Backplane is based on wire-wrap technology mounted to an aluminum support structure, approximately 18 x 14 inches in size. The 27 50-pin connectors used are obsolete and need to be upgraded to more common style connectors. The majority of signals are TTL with a few low current voltage lines.

2.0 SCOPE OF WORK

The Government is seeking a circuit card design and manufacturing supplier to manufacture a single Circuit Card Assembly (CCA) to replace the 4 existing Control and Monitoring circuit cards and a Printed Wiring Board (PWB) to replace the existing “wire wrapped” backplane design.

2.1 CLIN 0001: Circuit Card Assembly Design:

The vendor shall (1) design a single CCA that solely supports the combined functional requirements of the 4 existing transmitter control and monitoring circuit cards documented in Attachment 2. Note from Figure 2, that there are several test points on the end of each of the 4 current cards. These test points shall (1.1) be preserved in the new design. Completion of this task shall (1.2) be the successful conduct of a Critical Design Review (CDR) on the proposed design. Documentation of the CCA design shall (1.3) be provided for review 2 weeks prior to the CDR. The documentation of the new design shall (1.4) be consistent in content and level of detail with the technical data package for the legacy design provided in Attachment 2 and compatible with AUTOCAD (2004 and newer).

2.2 CLIN 0002: Backplane Printed Wiring Board (PWB) Design:

The vendor shall (2.0) design a PWB that supports the identical functional requirements of the current wire-wrapped design documented in Attachment 2. The PWB design shall (2.1) provide a mechanical and electrical interface to the developed CCA (CLIN0001) by means of a socket on the PWB, into which the CCA is connected. The socket shall (2.2)

Figure 3: Wire-Wrapped Backplane Figure 4: Connectorized Side of Backplane be designed to support complete integration of the CCA within the WSR-88D transmitter via connection to the PWB. The PWB design shall (2.3) also replace the existing 27 50-pin connectors with a more modern style of connector. Each of the new connectors shall (2.4) provide a “one-for-one” replacement for each of the existing 50 pin connectors.

Therefore, the resulting design shall (2.5) utilize 27 connectors. The design shall (2.6) also include removable adapters which can be used to connect the PWB using existing 50 pin cabling since the cabling that will connect to the PWB will not be upgraded until sometime in the future. The PWB design shall (2.7) include a second socket that provides a mechanical and electrical interface to the Government-developed Optical Discharge Trigger CCA, the design of which is documented in Attachment 2. The socket shall (2.8) be designed to support complete integration of the CCA within the WSR-88D transmitter via the PWB. Completion of this task shall (2.9) be the successful conduct of a Critical Design Review (CDR) on the proposed design. Documentation of the PWB design shall (2.10) be provided for review 2 weeks prior to the CDR. The documentation of the new design shall (2.11) be consistent in content and level of details with the technical data package for the legacy design provided in Attachment 2 and compatible with AUTOCAD (2004 and newer).

*The Government’s preference is to conduct a single CDR for the complete design rather than a separate CDR for the CCA and PWB.

2.3 CLIN 0003: Circuit Card Assembly Prototype:

Following a successful CDR, the vendor shall (1.5) produce two units for delivery to the Government for compliance testing. To be acceptable, the delivered units shall (1.6) fully support the functions of the legacy components as detailed in the technical documentation provided in Attachment 2.

2.4 CLIN 0004: Printed Wiring Board Prototype:

Following a successful CDR, the vendor shall (2.12) produce two units for delivery to the Government for compliance testing. To be acceptable, the delivered units shall (2.13) fully support the functions of the legacy components as detailed in the technical documentation provided in Attachment 2.

*Execution of OPTION 1001 and OPTION 1002 is predicated upon the successful Government testing of CLIN 0003 and CLIN 0004 deliverables.

2.5 OPTION 1001: Circuit Card Assembly Low Rate Initial Production (LRIP):

Following acceptance of the CCA prototype (CLIN 0003) by the Government, the vendor shall (1.7) produce eight units using production processes for delivery to the Government for compliance testing. To be acceptable, the delivered units shall (1.8) fully support the functions of the legacy components as detailed in the technical documentation provided in Attachment 2.

2.6 OPTION 1002: Printed Wiring Board Low Rate Initial Production (LRIP):

Following acceptance of the PWB prototype (CLIN 004) by the Government, the vendor shall (2.14) produce eight units using production processes for delivery to the

Government for compliance testing. To be acceptable, the delivered units shall (2.15) fully support the functions of the legacy components as detailed in the technical documentation provided in Attachment 2.

*Execution of OPTION 1003 and OPTION 1004 is predicated upon the successful Government testing of OPTION 1001 and OPTION 1002 deliverables.

2.7 OPTION 1003: Circuit Card Assembly Full Production:

Following successful testing of LRIP units, manufacture and deliver 250 production units identical to LRIP units delivered under OPTION 1001, with any deviations approved by the Government. To be acceptable, the delivered units shall (1.9) fully support the functions of the legacy components as detailed in the technical documentation provided in Attachment 2.

2.8 OPTION 1004: Printed Wiring Board Full Production:

Following successful testing of LRIP units, manufacture and deliver 250 production units identical to LRIP units delivered under OPTION 1001, with any deviations approved by the Government. To be acceptable, the delivered units shall (2.16) fully support the functions of the legacy components as detailed in the technical documentation provided in Attachment 2.

3.0 Government Furnished Information (GFI)

A complete listing of documents related to the current design is included as Attachment 2 to this SOW. The actual documents will be made available electronically on the Department of Commerce Office of the Chief Information Office (OCIO) Secure File Server as it was for the recent “sources sought” for this requirement. The solicitation will provide directions for requesting access to this secure file server. Vendors are expected to review the data package provided and identify any areas considered to be insufficient to support the requirements of this SOW. Any deficient areas in the data package provided must be identified to the Contracting Officer in writing at the earliest opportunity. Identification of GFI deficiencies late in the proposal development process may delay award. Identifying GFI deficiencies after award will not be acceptable.

4.0 Government Provided Equipment (GPE)

The Government will also provide a complete set of 4 monitoring and control circuit cards as described in paragraph 1.3, an Optical Discharge Trigger circuit card, and a wire wrapped backplane to the vendor to support development. If additional GPE is required by a vendor, the request for this equipment shall be made by the vendor early in the proposal development process.

5.0 Chinese Compulsory Certificate

Two of the NEXRAD radars supported by the NWS are located in China. As such, a Chinese Compulsory Certificate (CCC) shall (3.0) be provided by the manufacturer prior to delivery under OPTION 1001 and OPTION 1002. The following is a link to the CCC web page (http://export.gov/china/doingbizinchina/eg_cn_027466.asp).

http://export.gov/china/doingbizinchina/eg_cn_027466.asp