User's Manual

Table Of Contents
SYSTEM DESCRIPTION AND INSTALLATION MANUAL
T
3
CAS/Part No.9005000
If the radio altimeter output is greater than 2,200 feet (670.56 meters)
(source is valid, but data is invalid), the radio altitude value is replaced by
OVR RNG.
When both radio altitude sources are invalid, line 3 is blank.
(e) Transponder (XPDR) Status Page
Selection of code 0003 displays the XPDR Status page Figure 6-5. This
page displays data for the transponder selected at the time the extended
test mode was entered.
Figure 6-5: Typical Transponder (XPDR) Status Page
The message contents for the XPDR Status page are determined as follows:
XPDR #1
PASS
Indicates PASS or FAIL status of the selected
transponder (XPDR #1 or XPDR #2) as indicated by the
digital transmission from that transponder. FAIL is
displayed if no data is received on the bus.
MODE S ADDR
8E78A0H
Indicates the Mode S address (in hexadecimal format)
of the selected transponder as determined by program
pins at the rear connector of the transponder. (See
Note 1.)
PRESS. ALT
1133FT
Indicates the last pressure altitude being reported by
the selected Mode S transponder before the TCAS
system was placed into STBY. This value is not
updated while in extended test mode.
ALT
REPORTING
ON
Indicates current position of altitude reporting switch on
Mode S/TCAS control panel - ON or OFF. S/W PN
PS7021601-903 (See Note 2.)
6-22
04 Nov 2014
34-45-29
Pub. No. 8600200-001, Revision 004
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