TITLE
Timecode Reading Problems
NUMBER
TN-E698
REV
B
DEPARTMENT
Engineering
CREATED BY:
K. Hultgren
EFFECTIVE DATE
January 23, 2009
APPROVED BY:
L. Brown
Appendix L. Technical Notes
L-11
Document #: 9301H264001.1
Checking for noise on a timecode reader using an
oscilloscope
1.
Connect the oscilloscope to the reader as explained on page 4.
2.
Set the oscilloscope to 0.5V/division, sweep at 0.5ms/division, and set the trigger to internal.
Perform the test with no film threaded through the reader.
FIG. 1
CORRECT OUTPUT
FIG. 2
NOISY OUTPUT
_____________________________________
500mV/DIV 0
.
5ms/DIV 500mV/DIV
0
.
5ms/DIV
The signal output should be clean and without any noise or spikes. If your timecode reader has noisy
output, replace the reader.