B ATCRBS TRANSPONDER KT 76C
Rev 3, May 2004 IM 006-10545-0003.dwd Page 1-2
1.3 TECHNICAL CHARACTERISTICS
1.3.1 KT 76C PHYSICAL CHARACTERISTICS
Table 1-1 KT 76C Technical Characteristics
TSO Compliance: C74c Class 1A
Environmental - See TSO Appendix
Software - Criticality Level “D”
Physical Dimensions: See Figure 2-3, Dwg No. 155-06039-0000.
Weight: See Figure 2-3, Dwg No. 155-06039-0000.
Applicable Documents: TSO-C74c (Technical Standard Order ATC
Transponder Equipment)
RTCA DO-160C (Environmental Conditions and Test
Procedures)
RTCA DO-178B (Software Considerations in Airborne
Systems)
Mounting: Panel Mounted
Temperature: -20 °C to +55 °C
Altitude: 35,000 feet
Cooling: No forced air cooling required, but recommended.
Vibration: Constant total excursion of 0.2 in. from 5 to 17 Hz
From 17 to 38 Hz - 3.0 g-pk
From 38 to 500 Hz - 1.5 g-pk
From 500 to 2000 Hz - 1.0 g-pk
Shock: Rigid mounting 6 G operational 15 G crash safety.
Power Input: Watts maximum
0.7 Amperes @ 27.50 Vdc
1.6 Amperes @ 13.75 Vdc
Standby current:
0.400 A @ 28 Vdc
0.758 A @ 14 Vdc
Lighting current:
55 +/- 17 mA @ 28 Vdc
110 +/- 34 mA @ 14 Vdc
Receiver Characteristics:
Sensitivity Variation with Frequency: The RF input level required to produce 90% replies will
not vary by more than 1 dB between modes and will at
no time exceed a level of -69 dBm for standard
ATCRBS interrogations in the frequency range
between 1029.8 and 1030.2 MHz.
Bandwidth: A standard ATCRBS interrogation signal below 1005
MHz and above 1055 MHz will be at least 60 dB
stronger than that required to produce the same reply
efficiency at 1030 MHz.
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