evertz 5601MSC - Configuring the Input References; Selecting the Frequency Reference; Table 4-5: Root Level of the INPUT Menu

Model 5601MSC
Model 5601MSC Master SPG/Master Clock System
Page - 90 Revision 2.2 MASTER CLOCK
4.3. CONFIGURING THE INPUT REFERENCES
The INPUT menu is used to set up various items related to the input references of the 5601MSC. The
chart below shows the items available in the INPUT SETUP menu. Sections 4.3.1 to 4.3.12 give
detailed information about each of the sub-menus.
Frequency Ref Contains items controlling the frequency reference and how to lock to it
Time Contains items related to the time reference and how to lock to it
Jam Input
Contains live controls that can force the 5601MSC to lock immediately to
the frequency or time reference
Table 4-5: Root Level of the INPUT Menu
4.3.1. Selecting the Frequency Reference
INPUT
The Reference Src menu item in the Frequency Ref menu is used to select
the frequency reference that the
5601MSC will use to lock its internal
oscillator. All outputs are driven from a common oscillator and therefore are
clock locked to each other (i.e. they do not drift with respect to each other).
When set to the different possible reference sources and the appropriate
reference is supplied, the phasing of the video
and DARS outputs is
affected as shown in the lock diagram in section 2.2.
When set to GPS the 5601MSC will lock its ovenized oscillator to the 1pps
pulse from the GPS smart antenna. Selecting this option forces the Genlock
Range
to Narrow. All outputs are phased with respect to a specific date in
GPS time. This forces the time reference to GPS time. The GPS-disciplined
internal oscillator will maintain superb long-term accuracy
. Refer to section
2.2.13 for more information.
When set to 10 MHz the 5601MSC will look for a 10MHz or 5MHz frequency
reference on the reference loop input. It will lock in either Narrow or Wide
mode, depending on the Genlock Range
setting. The 10MHz or 5MHz
reference supplies no phase information and the phase of the outputs will
change if the unit is powered down and r
ebooted. The phase between
different 5601MSC units locked to 5MHz or 10MHz will not be the same.
When set to Video the 5601MSC will lock to a valid black burst or tri-level
video signal applied to the reference loop inputs. The Genlock Range menu
item is used to select the tolerance of the master oscillator lock range. Note
that the 5601MSC requires a colorburst on NTSC and PAL references, with
a SCH error of less than 35º. Burst is not required for Slo-PAL bi-level
references. Refer to section 2.2.5 for more information.
When set to Internal the 5601MSC will free-
run on its internal ovenized
oscillator. This forces the Genlock Range
to Narrow. The stability of this
ovenized oscillator is
0.01ppm, which corresponds to a time drift of about
0.31 seconds per year. Refer to section 2.2.12.1 for more information.
Frequency Ref
Reference Src
GPS
Ten MHz
Video
Internal