SOW_498-01212015_r3.doc

STATEMENT OF WORK

Terminal Doppler Weather Radar (TDWR) Transmitter Control Module (TCM)

Radio Frequency (RF) Klystron Interface Cables

AJW-1412

02/05/2025 Contents

31.

BACKGROUND / OVERVIEW

32.

SCOPE OF WORK

43.

CONTRACTOR TASKING / REQUIREMENTS

44.

SPECIAL CONDITIONS

45.

DELIVERABLES

46.

PERIOD OF PERFORMANCE

1. BACKGROUND / OVERVIEW

Terminal Doppler Weather (TDWR) Transmit Control Module (TCM) Service Life Extension Program (SLEP) has provided TDWR sites with new technology from engineering sustainment efforts. Current conditions at remote sites using the new TCM hardware indicate Electromagnetic Interferences (EMI) which prevent consistent operation. To minimize the unknown EMI effects on the system, specifically the TCM, RF decoupling efforts have been attempted with the TCM enclosure. This resulted in redesigning transmission line routing to prevent induced RF noise to the Klystron tube and prevent excessive crystal detector failures in the field. This SOW requires RF cables to be accepted within workmanship parameters identified within this document.

2. SCOPE OF WORK

The Contractor shall provide the items listed in section 3.0 in accordance with section 5.0 and 6.0.

The Klystron analog inputs will require system cable assembly modifications for the decoupling interface. 5 Coax assemblies per system transmitter, which correspond with Klystron RF analog signals, have been identified as impedance sensitive transmission paths to the TCM. Specific assembly requirements are listed in Table 1.

Table 1 TCM Klystron specifications Cable characteristic profile for all cables assemblies in Table 1 are required to meet or exceed parameters identified in Table 2. The characteristic profile report is required for each cable. In addition, the cables shall have heat-shrink to assembly labels and from assembly labels to identify the terminated end in the system.

NOTES:

1) BNC-M Connection will only require 0-3GHz operating frequency range due to connector limitation.

2) Cable characteristics identified in Table 2 must be exceeded for acceptance.

3) To Assembly Labels and From Assembly Labels will be placed 2” – 3” from the end of the cables.

Electrical Characteristics

Table 2 Minimum Parameter Requirements

3. CONTRACTOR TASKING / REQUIREMENTS

The contractor shall provide the following items.

Table 3 Part descriptions

Each assembly shall contain the following parameters as Identified in Table 1. Requirements for each cable are as follows:

· “To Assembly Label” using standard indoor, protected, black on white printed letter labels.

· “From” Assembly Label” using standard indoor, protected, black on white printed letter labels.

· Connector types must match associated color-coded label group as identified in Table 1.

· Associated cable lengths, as indicated in Table 1, will be required to match within identified lengths.

· All cables must use specific material identified in Table 1. Identified coax type must be printed on cable jacketing material.

All cable assemblies must be provided with RF electrical characteristic charts from a current calibrated test equipment. RF electrical characteristics must be within the Minimum Parameter Requirements identified in Table 2 unless noted otherwise within this SOW.

4. SPECIAL CONDITIONS

Any conditions which prevent normal usage of RF cables from the Original Equipment Manufacturer (OEM) will not be considered acceptable delivery. This may include, but not limited to, incorrect electrical characteristic represented data.

5. DELIVERABLES

The contractor shall deliver the items specified in section 3.0 with the Period of Performance specified in section 6.0. All items shall be delivered to:

FAA / MMAC

ATTN: Ken Courtney

6500 S. MacArthur Blvd.

Bldg 201

Oklahoma City, OK 73169

6. PERIOD OF PERFORMANCE

OEM shall deliver the items specified in section 3.0 within 16 weeks After Receipt of Order (ARO).