External Data Source For The Mx20 I/O - Garmin MX20 Installation Manual

2.7.3 External Data Source for the MX20 I/O

The MX20 I/O allocates fixed data source ports for interface to the radar, TAWS, and traffic sensors.
Software configuration is not required for SkyWatch (SW version 1.6, or greater), GTX330, or TCAD
traffic sensors. The I/O version of the MX20 adds traffic and radar functionality. These data sources are
configured in a similar manner as the basic MX20 external sensors. Note that only one traffic source may
be connected to the MX20 I/O at one time.
2.7.3.1 Ryan TCAD source
Select the RS-232 port 1-3 where the TCAD unit is connected. The 9900B must have software version
1.08, or later. The 9900BX must have software version 1.11, or later.
2.7.3.2 SkyWatch
Select the configuration which matches the physical installation. The two models, SKY497 and SKY899,
are supported by the TAS option for the Traffic Source (429) data source. Additionally, if the MX20 is not
wired to drive the discrete inputs (when an additional display such as the WX1000 is being used), select
the + DISP option. If the MX20 is wired to drive the SkyWatch discrete inputs, select just the basic TAS
model without the + DISP option. Using the +DISP option indicates that an external display is responsible
for driving the discrete inputs and the corresponding MX20 controls will be disabled on the MX20 Traffic
page. SkyWatch SW version 1.6, or greater, is required for compatibility.
2.7.3.3 Radar
Select the model of the Radar connected. Currently the GWX 68, ART2000 and the RS-181A are
supported. The ART2100 is supported if it is configured as an ART2000. Only ART2000 functions are
available. GWX 68 installations require MX20 software version 5.6 or later.
2.7.3.4 TAWS
Select the model of the TAWS sensor connected in the system. Currently only the L-3 (Goodrich)
Landmark TAWS 8000 and KGP560 are supported. Select TAWS8000 for the Landmark 8000 and
EGPWS for the KGP560.
MX20 Installation Manual 560-1025-09 Rev E
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