SPECIAL NOTICE
61 -- Traveling Wave Tube AMplifier
- Notice Date
- 8/27/2008
- Notice Type
- Special Notice
- NAICS
- 334220
— Radio and Television Broadcasting and Wireless Communications Equipment Manufacturing
- Contracting Office
- Department of the Air Force, Air Force Materiel Command, AFFTC - AF Flight Test Center, 5 S WOLFE AVE, Edwards AFB, California, 93524-1185, United States
- ZIP Code
- 93524-1185
- Solicitation Number
- F1S0AX8178B001
- Response Due
- 9/3/2008
- Archive Date
- 8/9/2010
- Point of Contact
- Nathan C. Hansing, Phone: 6612778470
- E-Mail Address
-
nathan.hansing@edwards.af.mil
- Small Business Set-Aside
- N/A
- Description
- Notice of Contract Action for a Sole Source Procurement SUBJECT: NOTICE OF INTENT TO AWARD A SOLE SOURCE PROCUREMENT FOR FOUR (4) TRAVELING WAVE TUBE AMPLIFIERS. DESC: INTENT TO AWARD A SOLE SOURCE PROCUREMENT WITH APPLIED SYSTEMS ENGINERING, INC.. The Air Force, Edwards Air Force Base, CA intends to award a Sole Source purchase order to Applied Systems Engineering, Inc., 7510 Benbrook Pkwy., Fort Worth, TX 76121. The Sole Source purchase will be for the following commercial item with installation: Salient Characteristics for the Traveling Wave Tube Amplifier. ; Part #: 37X/Ku, Traveling Wave Tube Amplifier. ; Quantity: 4; Manufacture: Applied Systems Engineering ; SPECIFICATION FOR 6 - 18 GHz, 100W TWTA 1. SCOPE This specification establishes the requirements for a medium power, Dual-mode, broad frequency band, amplifier for operation in CW and pulsed modes. The Traveling Wave Tube Amplifier (TWTA) unit combines the TWT, power supplies, auxiliary controls and indicators, and RF components into one complete, 19-inch rack mountable assembly. The TWTA must provide electrical interface and control for mid-frequency Switched Filter Assembly. 2. APPLICABLE DOCUMENTS DOD-STD-1686 Electrostatic Discharge Control Program for Protection of Electrical and Electronic Parts, Assembly and Equipment (Excluding Electrically Initiated Explosive Devices) (Metric) IEEE-488.1-87 Standard Digital Interface for Programmable Instrumentation 3. REQUIREMENTS 3.1. Amplifier Performance 3.1.1. Primary Power Requirements The primary power input voltage shall be 208 VAC ±10%, 47-63 Hz 1- phase, removable power cord with connector NEMA 6-20P 20A 250V Hubbell 5478-C flanged inlet or equivalent female receptacle, NEMA 6-20R 20A 250V Hubbell 5469-C male plug. The primary power AC input requirement shall not exceed 3300 volt amperes with a power factor of 0.85 minimum at the TWTA rated CW RF output power condition. The TWTA chassis shall include a safety interlock, removing AC power when any chassis panel is removed. 3.1.2. Frequency Range This amplifier shall operate over the 6.0 - 18.0 GHz frequency range. 3.1.3. Operating Modes The TWTA shall maintain the specified output parameters with either an RF continuous wave (CW) input drive producing an RF CW output, or with an RF pulse input drive producing an RF pulse output. CW and pulsed RF input drive levels will be intermixed; they will occur at any frequency within the frequency ranges specified, and they will be asynchronous with respect to each other. Compliance to all performance specifications will apply in either the CW or Pulsed modes of operation. The TWTA shall maintain a pulse-up ratio of ±1.0dB between CW mode and pulse mode over a 0.1 usec to CW duty ratio. 3.1.3.1. Operating Mode Control The TWTA shall be capable of operating in either the CW or Pulsed mode of operation. This will be controlled by either the IEEE-488 bus or by the use of a rear panel mounted switch. A ‘pulse control' port shall be available in the rear panel of the TWTA to receive signals to control the TWTA beam gating. A 50-ohm female BNC connector shall be used for this port. Control signals provided to this port shall be TTL compatible, high-true (high-true indicates RF ON and low-true indicates RF OFF). The rear panel mounted switch will have the capability of overriding the ‘pulse control' port. 3.1.4. RF Output Power The TWTA will produce a minimum of 50 dBm at the TWTA chassis output connector. The TWTA RF output power level will be measured at the TWTA chassis output connection, into nominal 50-ohm load impedance, with a 2.0:1 VSWR at any phase angle. The TWTA specified RF output power level shall exist at the saturation point of the TWTA gain characteristic curve. Harmonics and spurious frequencies that exist in the TWTA output power spectrum at amplitudes greater than -40 dBc shall not be included in the specified RF output power determination. Level power output must increase monotonically with input power up to TWTA saturated output power across a linear range of at least 50 dBm. 3.1.5. RF Gain The TWTA assembly shall possess a minimum gain of +54 dB ±4dB in the small signal region of operation over the specified bandwidth (that is at f0 ± 3MHz). This gain shall be the small signal gain value (average slope of the RF power input versus RF power output). In addition, the TWTA will possess a minimum gain of 50.5 dB up to the saturated region of amplifier operation over the specified bandwidth. 3.1.5.1. Normalized Input The TWTA shall produce its maximum rated output across the frequency bandwidth with an RF input of 0 dBm or less. 3.1.5.2. Passive Gain Equalizer The maximum gain variations for the TWTA assembly in the saturated region of amplifier operation (100W CW) shall be ±1.5 dB across the specified operating bandwidth: f0 ±3 MHz. The amplifier may contain a passive gain equalizer to limit the gain variation, if required. 3.1.5.3. Gain Variation vs. Time (Gain Stability) Small signal gain stability measured at constant temperature (70° ±5°F), during any 24 hour time interval, at any fixed frequency within the specified frequency range of 6 - 18 GHz., and at any constant RF input drive level within a -40 dB range of specified RF output power shall not exceed ±0.5 dB. 3.1.5.4. Gain Variation vs. Frequency (Gain Ripple) Small signal gain stability measured at constant temperature, at any constant RF input drive level within a -40 dB range of specified RF output power, and over the specified frequency range of 6 - 18 GHz. shall not exceed ±1.0 dB peak to the adjacent valley. The gain slope variation shall not exceed ±1.0dB within a 40 Mhz frequency change. 3.1.5.5. Gain Variation vs. Temperature Small signal gain stability measured at any constant RF input drive level within a -40 dB range of specified RF output power, at any fixed frequency within the specified frequency range of 6 - 18 GHz., and over the 0C to +50C range of ambient temperatures shall be less than ±2.0 dB peak-to-peak. 3.1.5.6. Gain and Phase Stability AM/PM conversion shall be less than 2 degrees per dB from -40dBm to -15dBm RF input drive level and no more than 6 degrees per dB from -15 dBm to the specified RF output power level (54±4dBm) 3.1.6. Pulse Repetition Frequency (PRF) in Pulsed Mode Operation The TWTA will operate in the pulsed mode at a PRF of 500 Hz to 1 MHz minimum. 3.1.7. Radio Frequency Stability (Freedom from oscillation) The TWTA shall not oscillate under any combination of the following conditions: 1. Any combination of complex source and load impedances presented to this TWTA 2. Variation of ambient temperature from 0C to 50C 3. Variation of the TWTA line voltage by ±10% 3.1.8. Input/Output 3.1.8.1. Input/Output Impedance All coaxial RF input and output impedances shall be 50 ohms nominal with the exception of the detected RF output which is 75 ohms. All electrical performance requirements specified in section 3.1 shall be satisfied with a TWT output VSWR of 1.5:1. Load impedance may vary from an open circuit to a short circuit with no resulting TWTA damage. 3.1.8.2. VSWR The TWTA calibrated input VSWR shall be 2.0:1 maximum. The TWTA shall be capable of operating into a load VSWR of 2.7:1 maximum at the TWTA assembly output without tripping the reverse power protection circuitry. Load impedance may vary from an open circuit to a short circuit. The reverse power protection circuitry shall prevent damage to the TWTA under these conditions. 3.1.8.2.1. Reflected Power Detection Circuit The TWTA shall include excessive reflected power detection circuitry and place the TWTA in standby mode for TWTA output VSWR's greater than 2.7:1 at rated output power. The TWTA shall be capable of operating into a load VSWR of 2.7:1 maximum at the TWTA assembly output, without triggering reflected power detection circuitry. 3.1.8.2.2. Tube Protection Criteria Protection circuitry shall be provided to prevent catastrophic failure or degradation of the TWT as a result of power supply failure or after 10 occurrences of loss of power regulation in one hour. Tube protection should include but not be limited to: a) Cathode over voltage b) Cathode under voltage c) Helix over current d) Collector over current e) Over-temperature f) Line under voltage g) Prime power over current 3.1.8.3. Output RF Power and Detected RF Sampling The TWTA assembly shall include an RF output forward-sample port. A dual directional coupler shall be used to perform this function and will be located between the TWT and the TWTA output rear panel Type N connector. The forward coupled signal shall be routed to the difference input of a 3 dB Hybrid Coupler. The reverse coupled signal shall be routed to a reverse power monitor. The Sum input port of the 3 dB Hybrid coupler will be connected by coaxial cable to a female SMA connector located on the rear panel of the TWTA. This connector shall be labeled ‘SSA sampled power input'. The 0-degree port of the Hybrid Coupler's output shall be available for RF Detection, and the 90-degree output port shall be connected by coaxial cable to a female SMA connector on the rear panel, and labeled ‘Sampled RF Output'. The signal present at this port will be typically -33 dBc. 3.1.8.3.1. Detected RF Output Port The TWTA assembly shall be able to envelope-detect a sample of the pulsed RF signal amplified by the TWT. The sampled RF output signal is available as an output of a Hybrid Coupler (Section 3.1.8.2). The detected pulse train will be scaled in amplitude (if necessary), buffered, and sent to an output connector on the rear panel of the TWTA. This port will produce 1.5V. output voltage across a 75-ohm load when the TWTA is producing its full output (section 3.1.3). This detector circuit shall have a frequency response (-3dB) from 500 Hz (max) to 75 MHz (min). The output connector will be a 75-ohm, female BNC connector. 3.1.9. Harmonic and Spurious Frequency Generation The amplitude of signals in the TWTA RF output power spectrum that are harmonically related to the RF input drive signal shall be suppressed more than 3.0 dBc. The amplitude of all other frequency components present in the TWTA RF output power spectrum, not including the 2nd, 3rd and other integer harmonics, shall be suppressed more than 50 dBc at frequencies greater than 500 KHz above, and below the RF input drive signal frequency. 3.1.10. Residual AM and Incidental FM While providing rated saturated output power with a CW RF input drive frequency, the amplitude of any frequency component present in the TWTA RF output power spectrum that appears as residual amplitude modulation frequency components shall be suppressed whenever greater than: • -40 dBc at frequencies less than 10 KHz above and below the fundamental RF input signal frequency. • -50 dBc at frequencies greater than 10 KHz above and below the fundamental RF input drive signal frequency but less than 500 KHz above and below the fundamental RF input drive signal frequency for all amplifiers. 3.1.11. TWTA Noise Power Density 3.1.11.1. TWTA Noise Power Density RF On The TWTA broadband noise power density shall not exceed +6.0 dBm over the operational bandwidth of the amplifier assembly. These values include the effects of any internal pre-amplifiers (ambient temperature = 40C; Input terminated with 50 ohms.). The TWTA assembly noise output power per MHz bandwidth at maximum small signal gain shall not exceed -30.0 dBm/MHz (ambient temperature = 50C). 3.1.11.2. TWTA Noise Power Density RF Off The TWTA assembly RF Attenuation capability (when the pulse control signal is in the TTL Low state) shall provide adequate signal and noise attenuation to insure the noise power density (NPD) at the TWTA assembly RF output connector/flange is at -100dBm/MHz or lower over the TWTA assembly operating bandwidth. This condition will occur within 50 nsec of the falling edge of the TTL drive pulse as measured from the 50% point of the RF input drive pulse trailing edge to the -100dBm/MHz noise floor of the TWTA assembly. 3.1.12. RF Pulse Performance 3.1.12.1. Pulse Rise/Fall Delay The rise time of both RF input drive pulse and the TWTA assembly RF output power pulse shall be measured from the 10% point to the 90% point of the pulse leading edge. Similarly, the fall time of both the RF input drive pulse and the TWTA assembly RF output power pulse shall be measured from the 90% point to the 10% point of the pulse trailing edge. The TWTA assembly RF output power pulse rise time shall not differ from the RF input drive pulse rise time by more than +5 nanoseconds. The TWTA assembly RF output power pulse fall time shall not differ from the RF input drive pulse fall time by more than +5 nanoseconds 3.1.12.2. Pulse Leading Edge Delay The RF pulse leading edge delay time shall be measured from the 50% point of the RF input drive pulse leading edge to the 50% point of the TWTA assembly RF output power pulse leading edge. Similarly, the RF pulse trailing edge delay time shall be measured from the 50% point of the RF input drive pulse trailing edge of the 50% point of the TWTA assembly RF output power pulse trailing edge. The TWTA assembly RF output power pulse leading edge delay time shall include the effects of any modified rise time and shall be less than 30 nanoseconds. The TWTA assembly RF output power pulse trailing edge delay time shall include the effects of any modified fall time and shall be less than 30 nanoseconds. The TWTA assembly RF output power pulse rise and fall time shall not exceed 15 nsec. 3.1.12.3. RF Output to Modulation-Gate-Pulse Timing The TTL Modulation-Gate-Pulse shall precede the RF output pulse by 500 nsec max, measured from the 50% point of the modulation-gate-pulse leading edge to the 50% point of the TWT assembly RF output pulse leading edge. Similarly, the modulation gate pulse shall precede the RF output pulse by 50 nsec maximum, measured from the 50% point of the modulation-gate-pulse trailing edge to the 50% point of the RF output pulse trailing edge. The TWTA assembly minimum RF output pulse width shall be 50 nsec while meeting the rated RF output operating specifications. 3.2. Power Requirements The primary power input voltage shall be 208 VAC ±10%, 47-63 Hz, 1-phase. The TWTA chassis shall include a safety interlock removing AC power when any chassis panel is removed. 3.3. Physical Requirements 3.3.1. General Each TWTA shall be self-contained and packaged in a standard 19 inch rack mounting configuration. The maximum height requirement for each TWTA assembly shall be 12.25 inches and the maximum depth shall be 30 inches. Any RF input or output conditioning required to satisfy the electrical performance requirements shall be contained within the rack mounted enclosure. If the utilization of primary power line filters is required in order to prevent any conducted or radiated, radio frequency interference from perturbing the normal characteristics of a typical, unfiltered and unconditioned laboratory primary power distribution system, they must be contained within the rack mounted enclosure. 3.3.2. Warm-up Time The warm-up time required for complete specification compliance shall not exceed 20 minutes. Any TWTA-specific time requirements, such as 180 ± 30 seconds between the initial application of primary power and the subsequence application of high voltages, must be ensured by methods internal to the TWTA. After full warm-up, if operation is transitioned to ‘STANDBY,' subsequent transitions to ‘OPERATE' shall not have any additional warm-up time. 3.3.3. Cool Down Time Any TWTA time-interval requirements between either the POWER ON or STAND BY states to the OFF state (from front panel or IEEE control) and the subsequent removal of high voltages must be ensured by methods internal to the TWTA assembly and shall not exceed 210 seconds. 3.3.4. RF Input/Output Connections All input and output connections shall be located on the TWTA rear panel. See table for connector type and labeling. J Number Label Connector Type J1 208Va.c. 3 Phase NEMA L21-20P Flanged Inlet J2 IEEE488 24 Pin IEEE 488 (f) J3 Pulse In BNC (f) J4 RF IN SMA (f) J5 RF OUT Precision (f) Type-N J6 RF TP SMA (f) J7 Det RF Out BNC (f) J8 SSA Sample IN SMA (f) Ext SW/FLTR 25 Pin Sub Min D (m) 3.3.5. Front Panel Mounted Controls and Indicators The front panel of the TWTA shall consist, at a minimum, of the switch controls and indicators described in the following paragraphs. All indicator devices shall be reliable enough to last the lifetime of the TWTs. 3.3.5.1. TWTA Power Switch A combination primary power ON/OFF switch and circuit breaker shall be included on the TWTA front panel. Power shall be applied to the TWT filament whenever this switch is placed in the ON position. With this switch in the OFF position, all primary power shall be removed from the TWTA assembly. 3.3.5.2. Standby/Operate Switch A Standby/Operate switch shall be included on the TWTA front panel. 3.3.5.3. High Voltage Switch A combination high voltage ON/OFF and fault reset switch shall be included on the TWTA front panel. Placing this switch in the OFF position shall remove the high voltage from the TWTA while maintaining heater power to the TWT filament. 3.3.5.4. Standby/Operate Indicator A Standby/Operate indicator shall be included on the TWTA front panel. 3.3.5.5. High Voltage Indicator A high voltage ON indicator shall be included on the TWTA front panel. 3.3.5.6. Filament Indicator A filament power ON indicator shall be included on the TWTA front panel. 3.3.5.7. Fault Indicator A latching reflected power fault indicator shall be included on the TWTA front panel. This reflected power fault shall be reset by operation of the high voltage fault reset switch. 3.3.5.8. Over Temperature Indicator A TWTA over-temperature indicator shall be include on the TWTA front panel. 3.3.5.9. Elapsed Time Meter An elapsed time meter shall be included on the TWTA front panel to indicate TWT filament excitation time and high voltage on time. 3.3.6. Dimensions and Configuration Overall dimensions of each amplifier assembly shall enable the TWTA to be mounted in a standard 19" rack. The maximum vertical height requirement for each TWTA shall be 12.25 inches. The maximum depth requirement for each TWTA shall be 30 inches for the chassis. No connections shall protrude from the rear panel by more than 2 inches. Specifics regarding dimensional requirements are given in section 3.3.1. 3.3.7. Weight The weight of the TWTA assembly shall not exceed 130 pounds. 3.3.8. Mounting The TWTA assembly shall include rack slides and mounting hardware for installation in a standard 19-inch equipment rack. The rack slides shall be able to support the amplifier in a fully extended position for diagnostics and repair activities. 3.4. TWTA Assembly Remote Interface Requirements 3.4.1. GPIB Interface/Programmability 3.4.1.1. TWTA and SFA Control Commands Command Hex Codes ASCII Characters OPERATE 02 4F 03 2E STX O ETX. STANDBY 02 53 03 2A STX S ETX * RESET 02 52 03 2B STX R ETX + Power UP 02 50 03 2D STX P ETX - Power Down 02 70 03 0D STX p ETX CR Select LPF-1 02 31 03 4C STX 1 ETX L Select LPF-2 02 32 03 4B STX 2 ETX K TWTA Input 02 54 03 29 STX T ETX ) SSA Input 02 4E 03 2F STX N ETX / CW mode 02 43 03 3A STX C ETX : PULSE mode 02 49 03 34 STX I EXT 4 OPERATE - This command will signal the TWTA to go to high voltage ON from STANDBY state if TWTA Input is selected. STANDBY - This command will signal the TWTA to remove high voltage. RESET - This command will signal the TWTA to reset faults. Power UP - This command will signal the TWTA control circuit to apply main power and start heater warm-up time delay. Power Down - This command will signal the TWTA control circuit to start cool down time delay and subsequent power down. Select LPF-1 - This command will select LPF-1 position when TWTA input is selected. Select LPF-2 - This command will select LPF-2 position when TWTA input is selected. TWTA Input - This command will select TWTA input. SSA Input - This command will select TWTA input. CW mode - This input will override pulse input and select "CW" mode of operation. Pulse mode - This input will enable pulse input for grid modulation. 3.4.1.2. TWTA / SFA Status String The status string consists of the STX and ETX characters a checksum, four bit code status bytes and a twelve character model number / serial number string. The status bits within the status bytes are set to a 1 to indicate a true condition. A brief bit description of each bit is included. The Fault status bits are bits that are latched in the TWA control and protection hardware. These errors must be cleared by issuing a RESET command. The string begins with STX ( 02h ), than the four bit coded status bytes, then the twelve character model number / serial number and then ends with the ETX ( 03h ) and a checksum character. The status bit coding is listed in the following tables with a brief description. Bit Position Bit Description 7 Always 0 6 Always 1 5 Fault Summary Status 4 Operate Status 3 Standby Status 2 Warm-up Status 1 Cool Down Status 0 Unit On Status Fault Summary - Protection system has detected a fault and has shut down transmitter. Operate - High voltage power supply has been commanded to go on. Standby - Unit is in standby and is ready for high voltage if no interlock. Warm-up - Heater warm-up time delay is in effect. Cool Down - Transmitter cool down time delay is in effect. Unit ON - Transmitter has been commanded on and has main power. Bit Position Bit Description 7 Always 0 6 Always 1 5 Helix Over Current 4 Over Temperature 3 High Voltage On 2 Pulse Input Fault 1 Interlock 0 Reverse Power Fault Helix Over Current - TWTA protection has detected Helix over current. Over Temperature Fault - TWT Temperature sensor has detected over temperature. High Voltage ON - High voltage power supply has cleared the low limit. Pulse Input Fault - Pulse input has detected over high pulse repetition rate. Reverse Power Fault - Protection has detected reverse power to high and has shut down high voltage. Bit Position Bit Description 7 Always 0 6 Always 1 5 Not Used 4 Over Current 3 Remote Enabled 2 Pulse Status 1 Cathode Under Voltage 0 Cathode Over Voltage Over Current - Protection circuit has detected HVPS input DC voltage over current. Remote Enabled - TWTA will respond to GPIB control commands when set to 1. Pulse Status - Pulse input for RF ON is enabled versus not set for CW mode. Cathode under voltage - Cathode power supply protection has detected voltage low and shutdown. Cathode over voltage - Cathode power supply protection has detected over voltage and shutdown. Bit Position Bit Description 7 Always 0 6 Always 1 5 Not Used 4 Switch Fault 3 TWTA Input Selected 2 Not Used 1 LPF-1 Selected 0 LPF-2 Selected Switch Fault - Switch filter assembly not reporting correct switch positions. TWTA Input Selected - TWTA input has been selected for RF input. SSA Input Selected - SSA Input has been selected for RF input. LPF-1 Selected - Low Pass filter one position has been selected for RF output. LPF-2 Selected - Low Pass filter two position has been selected for RF output. 3.4.2. Discrete / Switch Filter Input / Output 3.4.2.1. Switch Filter Electrical Characteristics A TTL I/O interface shall be used to interface between the TWTA and the switch filter assembly. 3.4.2.2. Control / Status connector pin assignments 25 pin "D-Subminiature" male connector Pin # Function 1 TWTA RF Input Select (Not Used) 2,3,6,14,15 Spare Outputs 4 LPF-1 / LPF-2 Select 5,7,8 Logic Return 9,21,22,23,24 Spare Input 10 LPF-2 Status 11 LPF-1 Status 12 TWTA Input Status (Not Used) 13,16,17,18,19,20,25 Not Used 3.4.2.3. Control /Status Timing A minimum of 300 msec. delay will be used between issuing a control command from the TWTA and reading back the status from the Switch Filter Assemble. 4. ENVIRONMENTAL REQUIREMENTS 4.1. Operating Temperature The TWTA shall operate and meet the requirements of this specification over the ambient temperature range of 0 C to +50 C. The TWTA shall be operable in the ambient temperature ranges of -20 C to +55 C without damage. The TWTA shall not be required to conform to the specifications herein over the -20 to +0 C temperature range. 4.2. Non-operating Storage Temperature The TWTA assembly shall be neither damaged nor degraded when subjected to prolonged exposure to non-operating storage temperature of -40 C to +55 C. 4.3. Operating Altitude The TWTA assembly shall operate at any altitude up to 6000 feet. 4.4. Shock Vibration The TWTA shall be able to withstand normal shipping and handling without damage. 4.5. Cooling The TWTA assembly will be forced air cooled with an integral air moving device contained internally to the rack mounted enclosure. The cooling air intake port shall be located on the TWTA rear panel. The warm exhaust shall be ported through the rear panel. 4.6. Relative Humidity The TWTA shall operate throughout the relative humidity range of 0% to 95% maximum (non-condensing). 5. ACCEPTANCE TESTING 5.1. Standard Test Production tests, with graphic data, used in demonstrating the TWTA assembly compliance with specifications shall include the following: • RF output power level (3.1.3) plot power at saturated output power compression vs. frequency - 6 data points over frequency range of 6 - 18GHz, evenly distributed • RF Saturated Gain Variation (3.1.4.2) (plot gain vs. frequency) for a constant, CW, RF input drive level that produces +50 dBm (100W) output power. (Ten data points minimum or every 150 MHz; whichever is greater). 6. DOCUMENTATION The manufacturer/vendor shall supply operations and maintenance manuals that include at a minimum; schematics, wiring, trouble shooting procedures, assembly drawings, and a spare parts list. 6.1. Data Sheets Data sheets shall be included and contain sufficient data points to demonstrate compliance with standard tests and specifications as referenced under paragraph 5.0. Data will include insertion loss of all isolators/circulators and couplers across specified operational bandwidth (6 - 18 GHz.) between TWT and assembly output connector/flange of TWTA chassis. 6.2. Power Requirements Voltage and current requirements of the TWTA assembly shall be supplied with the test data sheets. 7. RELIABILITY 7.1. MTBF Minimum MTBF shall exceed 10,000 hours, in a ground benign environment at 40 C. Calculations are to be provided by the manufacture/vendor. 7.2. ESD Control Vendor is to be certified to DOD-STD-1686 for manufacture of this item. 7.3. Safety All removable panels shall possess safety interlocks that will disable operation when removed. Please note that this is not a request for competitive proposals. However, all interested parties who believe they can meet the requirements are invited to submit in writing complete information describing their ability to provide four (4) Traveling Wave Tube Amplifiers. Responses may be sent via e-mail to Nathan.Hansing@edwards.af.mil or mailed to AFFTC/PKDE, 5 South Wolfe Ave, Edwards AFB, CA 93524-1185, Attention: Nathan C. Hansing. Fax Number: 661-275-0470. Information received as a result of this notice will be considered solely for the purpose of determining whether to conduct a competitive procurement. A determination by the Air Force not to open the requirement to open competition, based on response to this notice, is solely within the discretion of the Air Force. If the office has not received any affirmative written responses by Close of Business (COB), 3 Sept 2008, a Sole Source purchase order will be pursued with Applied Systems Engineering, Inc., 7510 Benbrook Pkwy., Fort Worth, TX 76121.
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- Zip Code: 93524
- Zip Code: 93524
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