TCAS/TXPNDR control panels A-N-B switch
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TCAS/TXPNDR control panels A-N-B switch
Hello,
I've seen several TCAS/Transponder control panels with a 3-position switch marked A-N-B (N is the center postion). The maintenance manual says this switch is for "Above-Normal-Below" but that's it!
Anyone know what it is for?
I've seen several TCAS/Transponder control panels with a 3-position switch marked A-N-B (N is the center postion). The maintenance manual says this switch is for "Above-Normal-Below" but that's it!
Anyone know what it is for?
Join Date: Aug 1999
Location: England
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Its TCAS display volume for 'Other Traffic' blips.
Typical values would be.
N for Normal values are +/- 2,700 feet.
A for Above would display -2,700 to + 9,900'.
B for Below would display -9,900 to +2,700'.
The precise values are equipment specific. I've seen 8,000' as the deeper limit.
Crucial Points:
1. This is DISPLAY volume only, and has no bearing on TCAS tracking / collision avoidance.
2. It only affects OTHER TRAFFIC blips. Proximate Traffic, Traffic Advisory and Resolution Advisory blips are always shown, regardless of display volume selection.
CPB
Typical values would be.
N for Normal values are +/- 2,700 feet.
A for Above would display -2,700 to + 9,900'.
B for Below would display -9,900 to +2,700'.
The precise values are equipment specific. I've seen 8,000' as the deeper limit.
Crucial Points:
1. This is DISPLAY volume only, and has no bearing on TCAS tracking / collision avoidance.
2. It only affects OTHER TRAFFIC blips. Proximate Traffic, Traffic Advisory and Resolution Advisory blips are always shown, regardless of display volume selection.
CPB
Join Date: Jun 2003
Location: las vegas
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Anyone know how AIRBUS displays their TCAS II resolution advisories ( RAs- FCOM lingo) on the EADI ? IE are the indications on the Pitch Scale OR are they still using the V/S warnings-colored - sty of of this V/S region hashes?
