Transponder problems with ATC COMS - Video

On Nov 24, 9:15*pm, "Viperdoc" wrote:

So, the encoder could be culprit for the mis reported altitude. I suppose
there could be a difference in altitudes of 700 feet if the day was very
non-standard (such as very cold, high pressure, etc).

30.32 is "higher then normal" for the deep south of MS but I sure hope
that wouldn't have caused that much discrepancy :-)

Since the altimeter was spot on to field elevation at before take off
checklist, I knew that wasn't the culprit.

I suppose if I understand the digital world, that the FL displayed on
the transponder should match field elevation when on the ground. Is
that something worthy of checking before take off to make sure they
match?