LC2000/LC2000-IQ/LC4000/LC4000-IQ
Troubleshooting
Issue 1 Rev 6
Page 172
© 2015 SAM
B.5 Timecode Troubleshooting
Each video processing channel has its own associated timecode processor. Both Embedded
VITC and Embedded LTC are supported in the SD and HD domain. SD also offers VITC.
Timecode can either be handed over from the input or internally generated. Where the input
frame rate is 29.97 fps, both drop frame and non-drop frame modes are supported. For
29.97fps outputs, timecode can be configured as either drop frame or non-drop frame.
B.5.1 Testing Timecode
A useful test method on multiple channel units is to use the internal timecode generator of one
channel to test all the other channels.
B.5.1.1
Testing Timecode Performance
Consider the LC4000: this model has four video channels, each with an independent
timecode processor.
If you set channel 1 to “generate TC”, the channel is no longer dependent upon input
timecode. You can then feed the output from this video channel back into video channels 2, 3
and 4 in turn, and assess the performance of each channel at its respective output.
LC4000
TC Processor – Channel 1
(set to ‘generate TC’)
TC Processor – Channel 2
(set to ‘TC from IP’)
TC Processor – Channel 3
(set to ‘TC from IP’)
TC Processor – Channel 2
(set to ‘TC from IP’)
TC Processor – Channel 4
(set to ‘TC from IP’)
SDI in 1
SDI in 2
SDI in 3
SDI in 4
SDI out A1
SDI out A2
SDI out B1
SDI out B2
Test
Timecode
