Model 5601MSC
Model 5601MSC Master SPG/Master Clock System
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Revision 2.2
OPERATION
2.2.6. Serial Digital Video Timing
The 5601MSC has four separate serial digital video test generators that can be phased independently,
and are also phased by the Global Phase controls. In all the supported standards, SD, HD, and 3G, the
video outputs are aligned to the supplied reference. The alignment to analog sync has been calibrated
using SMPTE compliant timing and is guaranteed to be accurate to within one sample.
It should be noted that certain Tektronix equipment such as the WFM700 and WFM7120 will not show
correct alignment of a serial digital video source to a supplied external analog reference. These devices
appear to have been calibrated to the output of an unknown video DAC. This means they will not
display correct SMPTE timing due to the delay introduced in the measurements by the DAC process.
Since the outputs of the 5601MSC are aligned using SMPTE timing, their phase must be advanced
significantly in order to appear correct with Tektronix timing.
With no phase offset applied, the SDI outputs of the 5601MSC will be measured
by Tektronix gear as approximately 4.7us delayed (SD) or 1.3us delayed (HD)
when the Tektronix device is externally referenced to the respective analog sync
Examples of equipment that perform SMPTE compliant timing measurements are the Phabrix SX/DX
and OmniTek OTM-1000.
Содержание 5601MSC
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