TCAS on the PMDG 737NG series

TCAS was added as part of the PMDG 737NG 800/900 package and also adds this functionality to the PMDG 737 600/700 when installed. The original PMDG 737NG 600/700 did not have TCAS as part of the package. To activate the TCAS after upgrading, turn the selector on the Radio Management Panel Transponder to the TA/RA position and then depress the TFC button on the EFIS control panel to see the range rings.