Revision A
T-48 90 008 026
2-18
TEST
button pressed to advance to next test.
Diversity test initialized.
Display indicates a “PASS” when the Test Set determines whether
leakage relative to the inactive antenna is less than -20 dB.
TEST
button pressed to advance to next test. The MAX TRUE AIRSPEED test is not performed during the
auto sequence of Mode S tests.
Test Set transmits an UF=0 interrogation. Verifies that the transponder
airspeed code is one of seven possible RI field codes.
The DF=0 reply reports the aircraft maximum cruising true airspeed in
the RI field of the DF=0 format.
NOTE
TEST
button pressed to advance to next test. The VERTICAL STATUS BIT test is not performed during
the auto sequence of Mode S tests.
Test Set receives the Vertical Status as part of the UF=0 format. A
display of ONE (VS=1) is aircraft on ground. A display 0f ZERO
(VS=0) is aircraft airborne.
TEST
button pressed to advance to next test.
The Test Set begins transponder RF power, receiver sensitivity, and
frequency tests.
DIVERSITY
TESTING . . .
DIVERSITY
PASS
MAX TRUE AIRSPEED
TESTING . . .
MAX TRUE AIRSPEED
GT 300 & LE 600 KTS
VERTICAL STATUS BIT
VS=1 (ON GROUND)
POWER, RCVR & FREQ
TESTING . . .
Eight possible RI field codes are available.
1)
NO Max airspeed data
2)
LE 75 knots
3)
GT 75 & LE 150 kts
4)
GT 150 & LE 300 kts
5
) GT 300 & LE 600 kts
6
) GT 600 & LE 1200 kts
7)
GT 1200 kts
8) Not Assigned
.
GT denote “Greater Than”, LE denotes “Less than or Equal too”
