Garmin GTX 330 Installation Manual page 79

AMC
Item #
Section #
42. 8.3.1 Airborne Ground Velocity
For 1090 MHz Extended Squitter ADS-B
transmit systems, this should be demonstrated
by the relevant tests documented in:
43. 8.3.2 • ED-73B/ETSO-2C112b (or DO-181C);
• ED-102, as a minimum, or an equivalent
standard which is acceptable to the Agency (e.g.
DO-260 or DO-260A).
ADS-B transmit systems need to transmit
horizontal position quality indicators consistent
44. 8.3.3
with the associated position information at the
time of transmission.
The value of the horizontal position quality
indicators need to be based on the integrity
information for the encoding of the ED-102/
DO-260 related NUC and the DO-260A related
NIC quality indicator, as related to the
45. 8.3.4
horizontal position sources.
In addition, the encoding of the DO-260A NAC
quality indicator needs to be based on the
accuracy information of the horizontal position
sources.
In case of ED-102/DO-260 based ADS-B
transmit systems, the NUC Quality Indicator
46. 8.3.5
value need to be encoded based on the integrity
containment radius only.
If the ADS-B transmit system does not have a
means to determine an appropriate integrity
containment radius and a valid position is
47. 8.3.6 reported, then the Quality Indicator (i.e. NUC or
NIC) need to be encoded to indicate that the
integrity containment radius is unknown (i.e.
NUC/NIC should be set to 'zero').
Transmitter antenna installation needs to
comply with guidance for installation of ATC
48. 8.3.7
transponders to ensure satisfactory functioning.
(Also refer to ED-73B)
190-00207-02
Rev. U
Table B-1 Compliance Matrix
AMC Item Compliance Summary
Supported in BDS (0,9) Airborne
Velocity.
The GTX 330 is compliant with:
ETSO – 2C112b (DO-181C).
ETSO – C166a (DO-260A).
Garmin GNS Equipment: GPS
quality metrics are applicable at the
same Time of Applicability as the
position and velocity
Other:
____________________________
____________________________
____________________________
____________________________
_____________
GTX 330 calculates DO-260A NIC
using Horizontal Protection Limit
(HPL) provided by the GPS
position source per DO-260A.
GTX 330 calculates DO-260A
NAC using Horizontal Figure of
Merit (HFOM) provided by the
GPS position source per DO-260A.
Not Applicable – GTX 330 is
compliant to DO-260A not
DO-260.
Per DO-260A, GTX 330 encodes
Type Codes corresponding to
'unknown' (e.g. 'zero') when valid
HPL data is not available.
Transponder antenna is compliant
to TSO-C74c.
GTX 330/330D Installation Manual
Page B-7