TT31 Transponder Installation Manual 1 February 2010
00455-00 Issue AJ
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3. Technical Specifications
3.1 Regulatory
Specification Characteristics
Compliance ETSO 2C112b, TSO C112; Class 1 Level 2es
ETSO C166a; Class B0
FCC Identification VZI00220
Applicable documents EuroCAE ED-73B, EuroCAE ED-14D (RTCA DO-160D),
RTCA DO-181C, RTCA DO-260A
Software ED-12B (RTCA DO-178B) Level B
Power Requirements 10 – 33 Volts DC. Typical 6.3Watts @ 14Volts.
Altitude 35,000 feet
Humidity 95% @ +50C for 6 hours; 85% @ +38C for 16 hours.
Tested to Category A in DO-160D
Operating Temperature -20C to +55C
Transmitter Frequency 1090MHz ± 1MHz
Transmitter Power 240 Watts nominal; 125 Watts minimum at antenna after
allowing for 0.5dB connector losses and 1.5dB cable losses.
Transmitter Modulation 6M75 V1D
Receiver Frequency 1030 MHz
Receiver Sensitivity -74dBm ± 3dB
3.2 Physical Specifications (in Tray)
Specification Characteristics
Height 40mm (1.57”)
Width 160mm (6.30”)
Length 239mm (9.4”)
Weight 2.8lbs. (1.35Kg)
3.3 Installation Approval
The conditions and tests required for the TSO approval of the TT31 Mode S Transponder are minimum
performance standards. It is the responsibility of those desiring to install this transponder on or within a
specific type or class of aircraft to determine that the aircraft operating conditions are within the TSO
standards. The transponder may be installed only if further evaluation by the user/installer documents
an acceptable installation that is approved by the appropriate airworthiness authority.
Page 4 Trig Avionics Limited
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