A real time apparatus for testing a DTV antenna transmitting system, wherein
the
DTV antenna transmitting system transmits an original signal from a DTV transmitter
to a DTV transmitting antenna, is disclosed that includes a probe, wherein the
probe is connected in series with the DTV antenna transmitting system, and senses
signals traversing the DTV antenna transmitting system. An error detector of the
testing apparatus compares the received signal to the original signal to identify
the magnitude and location of errors.