TCAS TEST: Tic TR-220

[jazz-sparky]

Hello guys,

Our company just bought a brand new Multifunction tester from Tic: a TR-220. Unfortunately, we didn't received any training except the clap in the back with the user manual...

So tonight, we have to perform full TCAS test on a Dash-8... And it doesn't work! The tester seems to be stuck in ACQ mode and cannot track the signal. So, on the TA/RA VSI there is no target.
:ugh:
-TCAS self-test Pass;
-XPDR test with ramp tester pass;
-We're located in a fairly large hangar, but there's reflection for sure!
-Weight off Wheel is good;
-Rad ALT is set to 2000' AGL;
-Ramp tester power has been boosted up for a try, with no luck;

Any input would be appreciated!


Sparky

[fortuneteller]

Ive used the tr220 only for enhanced mode s so far, but believe that it has a software solution to reflected signals. Not familiar with dash 8's ,but boeing /airbus require baro altitude, The manual wasnt bad as long as its for the correct revision of software, otherwise there will be some anomalies, does your amm have a test for the tr220, most seem to have a variety for different test gear.

[jazz-sparky]

Unfortunately, the AMM and task cards have only instructions concerning the TCAS-201 tester, which we got rid of.

I finally got it figured out, by shielding the lower antenna, grabbing a ladder and installing the tr-220 10 feet from the top antenna in direct line of sight. The power measurement was then stable and acceptable. I was able to carry on with the scenarios. :ok:

Thanks for your input, Fortuneteller.