04A_Radar Altimeter[1].doc
DOC document 28 KB Posted
- Attached to
- Radar Altimeter
- Solicitation number
- RFQ - 04A - 10100400000000000373
- Issued by
- Kennebec County, Maine
About this file
This is a product specification document for a Radar Altimeter TRA-3500/TRI-40 system. The document outlines the technical specifications and performance characteristics of a radar altimeter unit designed for aircraft applications, specifically for altitude measurement and decision height alerting functions. The system features dual antenna configuration with altitude measurement capabilities ranging from 0 to 2500 feet, utilizing a 4.3-GHz center frequency with a sweep range of 4.25 to 4.35 GHz. The device operates on 27.5 VDC power with 750 mA current draw and includes an LED yellow seven-segment display with automatic dimming and a 2-times-per-second update rate. The system incorporates multiple alert functions including visual and aural decision height alerts, gear warning indicators, and an anti-hover circuit to prevent altitude wandering during helicopter operations.
The TRI unit measures 1.375 x 3.5 x 7.5 inches and weighs 0.75 pounds, while the TRA unit measures 3 x 3 x 6.9 inches with antenna and weighs 3.25 pounds. Environmental operating parameters include temperature ranges of -4°F to +131°F for the TRI unit and -40°F to +158°F for the TRA unit. The system provides altitude accuracy of 5 feet for altitudes between 0 and 100 feet, 5 percent accuracy for 100 to 500 feet, and 7 percent accuracy for 500 to 2500 feet. Additional features include decision height selection in 50-foot increments up to 600 feet and 100-foot increments to 900 feet, eight fixed trip point outputs ranging from 100 to 800 feet, and dual strut switch inputs for display disable functionality. The device holds PMA certification.
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| File | Type | Posted |
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| Solicitation_terms.doc | DOC document |
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Text version
Radar Altimeter
TRA-3500/TRI-40
SPECIFICATIONS:
Altitude Range: 0 to 2500 ft.
Power Requirements: 27.5 VDC; ±20%, 750 mA
Environmental: TRI: -4°F to +131°F (-20°C to +55°C)
TRA: -40°F to +158°F (-40°C to +70°C)
Alt: -45,000 ft. (13,716 m)
Size (HxWxL): TRI: 1.375 x 3.5 x 7.5 in.
TRA Unit: 3 x 3 x 6.9 in.
Weight: TRI: 0.75 lbs.
TRA Unit/Ants.: 3.25 lbs.
Antenna(s): Dual; ±20° pitch, ±30° roll
Display Type: LED, yellow seven segment, auto dim
Transmitter Power: 20 mW minimum
Frequency: 4.3-GHz center frequency sweep,
4.25 to 4.35 GHz
Display Update Rate: 2 times/sec.
Altitude Accuracy: 0 to 100 ft. ±5 ft.
100 to 500 ft. ±5%
500 to 2500 ft. ±7%
Decision Height Selection: 50-ft. increments to 600 ft.
100-ft. increments to 900 ft.
Flag(s): Displays “U” when unlocked
Self-Test: Indicates “8’s,” then DH and gear lights, then 40 ft. altitude
Visual DH Alert: Internal DH light; External output
Aural DH Alert: 1-kHz tone output
Gear Warning: Internal gear light, audible tone, and external indicator drive
ARINC Analog Outputs: A: 2.5 mV/ft., 0 V=0 ft.
B: 20 mV/ft., 400 mV=0 ft.
Trip Point Outputs: Eight fixed trip points; 100 to 800 ft.
Display Disable: Two strut switch inputs—ground or line
Anti-Hover Circuit: Prevents altitude wandering while helicopter is hovering
CERT I F I C ATIONS:
PMA
File details come from the government source that posted it. Updated .