User's Manual Part 1

ManualsBrandsACSS an L-3 Communications and Thales ManualsElectronicsTCAS

CAS / Part No. 9000000

SYSTEM DESCRIPTION AND INSTALLATION MANUAL

34-43-20

15 Feb 2003

Use or disclosure of information on this page is subject to the restrictions in the proprietary notice of this document.

1--25

Table 1--6. TT--950/951/952 T

CAS Computer Unit Leading Particulars (cont)

Item Specification

• Pulse Timing Characteristics:

-- PulseRiseTime ............................ 0.05 to 0.10 microseconds

-- PulseFallTime ............................. 0.05 to 0.20 microseconds

-- ATCRBS S1,P1,P3,P4Duration ............ 0.08 ± 0.05 microseconds

-- ModeSP1,P2Duration ..................... 0.08 ± 0.05 microseconds

-- ModeSP6Duration ........................ 16.25 ± 0.125 microseconds (short)

30.25 ± 0.125 microseconds (long)

• Whisper--Shout Characteristics:

-- Range ..................................... 0 to 26 dB attenuation by 1 dB steps

-- AbsoluteTolerance .......................... Relative to the 0 dB step, the attenuation

of each step does not exceed the

nominal attenuation by more than ±2dB

-- RelativeTolerance .......................... Step increments are ±0.5 dB and

monotonic

RF Receiver Characteristics:

• Receiver Frequency Range ..................... 1087 to 1093 MHz

• Receiver MTL Over Frequency ..................

(Normal Operation)

-- 7 7 ± 2dBm (≥90% Mode S and

ATCRBS replies decoded)

• Receiver Dynamic Range ......................

(Normal Operation)

--77 to --23 dBm (≥99% Mode S and

ATCRBS replies for signal levels greater

thanMTL+3dB)

• Extended Range Reception Capability ...........

(Optional Mode)

-- 8 2 ± 2dBm (≥90% Mode S squitter

replies decoded)

• Low Level Receiver Signal Rejection .............

(Normal Operation)

--81 dBm (≤10% Mode S and ATCRBS

replies decoded)

• Receiver Signal Processing ..................... Amplitude Mono--pulse

• SystemBearingAccuracy ...................... Error less than 9 degrees RMS, 27

degrees peak from --10 to +10 degrees

elevation

NOTES:

The TCAS-- II function within the unit meets all DO--160D Environmental

Requirements except for RF Radiated Emissions, Category M (DO -- 160D para.

21.4) in the frequency ranges 100--150MHz and 1215--6000MHz. In these

frequency ranges it meets the requirements for RF Radiated Emissions of

DO -- 160C, Category Z. The unit was tested to DO -- 160D change 1 test

procedures.

2. The TCAS--II function within the unit has 2 FAA approved software deviations. The

deviations do not affect the installation or performance of the system. The details of the

deviations will be furnished by ACSS upon request by the customer.