GUIDE TO INSTALLATION AND OPERATION
AMX-1901 |
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5.13 Test panel
This panel contains a pulldown that allows the user to select an
internally-generated test signal to replace the program signal at
the AMX-1901 output.
OFF:
the program signal appears at the output, and test signals
are OFF
Color Bars and Tone:
sends a 75% color bar test pattern
(100% white), along with audio test tones (a continuous tone on
right channel with pulsed tone on left channel in every pair) to
the AMX-1901 output.
Lip Sync:
sends a special test signal comprising color bars and
tone plus a detectable element that is used to align audio-video
delays in a processing path. This AMX-1901 becomes the
transmitter in the alignment path. A second device (e.g. FRS-
1801) will perform the measurement at the other end of the path.
•
The special test signal consists of 75% color bars within
which a white square is inserted every 4 seconds for a
duration of 10 frames. Simultaneously with the beginning
of the first field of video containing the white square, the
16 embedded audio channels and the 8 AES outputs are
pulsed with a tone lasting 250 ms.
Figure 5.35 Lip Sync test signal appearance and timing
Figure 5.34 Test panel
