Exhibit_1_Az_Rotary_Joint_Specification_(1).pdf

1305M319QNWWG0004 Exhibit 1

Minimum AZ Rotary Joint Specification For

WSR-88D Azimuth Rotary Joint Replacement

(P/N BS-2000-110-000)

1. Requirements

1.1. This four-channel waveguide rotary joint shall maintain the following characteristics during the transmission of power at the maximum levels specified and under the environmental conditions specified.

1.2. This rotary joint has three coaxial ports and one waveguide port. The waveguide port transfers the transmitter pulses through the pedestal. The coaxial ports transfer stable local-oscillator (STALO), horizontal intermediate frequency (H-IF), and vertical intermediate frequency (V-IF).

1.3. All specifications in sections 1.4 and 1.5 must be verified following the burn-in tests found in section 1.6.

1.4. Electrical

Requirement Notes

Channel 1, Transmitter Pulse

Frequency 2.7 to 3.0 GHz

Peak Power 1.1 MW At zero (0) PSIG and dry air. No arcing permitted

Average Power 2.2 kW

Between 0.7 and 5 microseconds;

maximum duty cycle of 0.2%. At zero (0) PSIG and dry air. No arcing permitted

VSWR 1.2:1 maximum Measured with load whose maximum VSWR is 1.05:1

VSWR WOW 0.05 maximum

Insertion Loss 0.2 dB maximum

Insertion Loss WOW 0.05 dB maximum

Phase WOW ±3 deg maximum

Channel 2, STALO

Frequency 2.6 GHz to 3.0 GHz

Peak Power 1 W minimum

VSWR 1.2:1 maximum Measured with load whose maximum VSWR is 1.05:1

VSWR WOW 0.05 maximum

Insertion Loss 0.5 dB maximum

Insertion Loss WOW 0.05 dB maximum

Phase Wow ±3 deg maximum

Channel 3, H-IF

Frequency 57.5491 MHz

Peak Power 1 W minimum

VSWR 1.2:1 maximum Measured with load whose maximum VSWR is 1.05:1

VSWR WOW 0.05 maximum

Insertion Loss 0.3 dB maximum

Insertion Loss WOW 0.05 dB maximum

Phase WOW ±3 deg maximum

Channel 4, V-IF

Frequency 57.5491 MHz

Peak Power 1 W minimum

VSWR 1.2:1 maximum Measured with load whose maximum VSWR is 1.05:1

VSWR WOW 0.05 maximum

Insertion Loss 0.3 dB maximum

Insertion Loss WOW 0.05 dB maximum

Phase WOW ±3 deg maximum

Channel Isolation

Channel 1 to all other channels 70 dB minimum

Coaxial channels 63 dB minimum

Phase Tracking Channel 3 and Channel 4 ±0.5 degrees maximum

RF Leakage Channel 1 95 dB minimum below signal inside waveguide

Excluding waveguide flanges, when measured 10 cm away from rotary joint with open ended waveguide

1.5. Mechanical

Requirement Notes

Waveguide Size M85/1-042, WR284, per Mil- W-85/1 or equivalent

Waveguide Flanges

M3922/61-001, UG-585A/U,

per Mil-F-3922/61 or equivalent for ports 1 and 2

Coaxial Interfaces N-Type Female

Pressurization 15 PSIG maximum Must maintain pressure without any connections on the coaxial interfaces

Leakage Rate 10 cc/min maximum at 3

PSIG

Torque 13 inch-pounds maximum Both starting and operating

Reliability (MTBF) 100,000 hours minimum without preventive maintenance

When run at 6 RPM continuously, per MIL-

HDBK-217.

1.6. Burn-In Tests

1.6.1. The unit shall be rotated for 16 hours at 6 RPM while running specified average power through Channel 1. After an eight-hour interval, the direction of rotation shall be reversed for the remaining eight hours.

1.6.2. The unit shall be rotated for 6000 revolutions at 15 RPM. After 3000 revolutions, the direction shall be reversed.

1.7. Environmental

Requirement Notes

Operating Temperature -40°C to +54°C Ambient

Non-Operating Temperature -62°C to +60°C Ambient

Humidity 15 to 100% Operating and Non-Operating

Altitude Up to 3300 meters (11,000 feet) above sea level

Salt Fog

Must be capable of continuous operation in a salt-laden atmosphere without degradation of material surfaces or performance

Fungus MIL-STD-454, Requirement 4

Transportability

The unit shall be designed to withstand the vibration and shock encountered during transportation by aircraft, ships, rail, and trucks. The unit, in addition, shall not be damaged or lose performance capabilities when transported by air at altitude of up to 50,000 feet in non-pressurized compartments

1.8. Material and Finish

Requirement Notes

Material Aluminum alloy 6061 per QQ- A-250/11 or equivalent

Finish

Chemical conversion coating on aluminum and aluminum alloys per MIL-C-5541, Class 3 on all aluminum surfaces.

Follow with enamel gloss per TT-E489 Class A, white color

no. 17925 per FED-STD 595 on all external surfaces, excluding flange faces, connectors, and mounting surfaces.

Castings, if applicable

If used, shall be QQ-A-601, A356-T6 or equivalent and meet the requirements of MIL- STD-2175 class 4, grade D.

Impregnate per MIL-I-17563.

Identification

Vendor identification, vendor part number, and serial number to be applied by vendor per MIL-STD-130.

Other Identifications

Channel identification and port markings shall be applied adjacent to each port. All markings to be applied by vendor per MIL-STD-130.

2. Quality Assurance

2.1. Every unit shall be tested by vendor for requirements identified in section 1.4.

3. Dimensions and Markings

Figure 1: Dimensions and Marking

Figure 2: Dimensions, Mounting Plate