5700MSC-IP
IP Network Grand Master Clock & Video Master Clock System
Revision 0.2 Page - 19
Pulse Signals
1Hz
1/1.001Hz
6/1.001Hz
PAL Colorframe
IRIG1 Datum
The pulse output modes provide timing pulses that can be used to lock downstream
equipment or can be helpful for troubleshooting purposes. These outputs cannot be
phased and always remain phase-locked to the frequency reference. These signals
may not be affected by any global phase offset.
The pulse type is set with the Pulse type menu item. Refer to the pulse diagrams in
Figure 3-1 and Figure 3-2 for timing relationships.
The 1Hz pulse goes high at the beginning of each second.
The 1/1.001Hz pulse indicates the start of the second for 29.97Hz LTC/VITC rates
and is also synchronized to NTSC color field 1. Will be high for the duration of NTSC
color field 1.
The 6/1.001Hz pulse indicates where 59.94Hz video coincides with the 23.98Hz
standards. This pulse is only phase locked when using a GNSS reference or NTSC
with a ten-field pulse.
The PAL Colorframe pulse will be high during PAL color field 1. It will only be phase
locked when referenced to GNSS or a PAL-B reference.
The IRIG1 Datum pulse will go high at the start of the IRIG second for 100ms. This
pulse will be aligned within 20 microseconds of the GNSS 1PPS pulse when locked
to a GNSS reference.
Bi-Level
625i/48
625i/47.95
480p/59.94
The slo-PAL sync output modes use the PAL video format but run at a slower frame
rate to be synchronous with 24Hz and 23.98Hz film standards. These output modes
consist of sync pulses only and do not have a colorburst.
These outputs can be phased independently. Note that VITC cannot be inserted onto
slo-PAL outputs.
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