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Trilogy Communications
Mentor RG
8.1.1
Genlock - Mode
Select the mode required using the encoder control. Please be aware that the mode will change
immediately each option is selected.
•
Internal Free Run
: sets the unit to be free running, relying on the internal oven oscillator for
stability. The ScH. of the unit will be set to zero.
Note:
the Mentor RG
must
be set to free run
when locking to a GPS signal.
•
External 10MHz
: sets the unit to genlock to the 10MHz input. There will be no fixed phase
relationship with any other units locked to this signal. The ScH. of the unit will be set to zero.
•
Manual SC Phasing
: sets the unit to genlock to the video input. The subcarrier phase offset
may be adjusted as required.
•
Force Strict ScH
: sets the unit to genlock to the video input. The ScH. of the outputs of the
unit is forced to be zero regardless of the genlock input ScH. This is achieved by moving the
line timing with respect to the genlock input until the correct ScH. phase results.
•
Follow External SC Phase
: sets the unit to genlock to the video input. The subcarrier output
phase is set to be the same as the input genlock video.
•
Sync Lock Only
: sets the unit to genlock to the video input. The system is genlocked using
only the sync information of the genlock video input. The ScH. phase of the output is forced
to be zero - i.e. “correct”.
8.1.2
Genlock - Loss
Set the operational mode of the unit following loss of the genlock signal.
•
Revert to Internal
: If the external reference input is removed, the unit will use the internal
oven maintained oscillator or GPS signal (when available) as its master oscillator.
•
External 10 MHz
: If the genlock video input is removed, the unit will use the 10 MHz input as
its master oscillator. If the 10 MHz input is not present when the video input fails, the unit
will use the internal oven maintained oscillator or GPS signal (when available) as its master
oscillator.
•
Flywheel
: If the genlock video input is removed, the unit will continue to operate -
“flywheel” - at the same frequency as the genlock input just removed. Note that if the unit is
powered up in this mode with no genlock input applied, the Mentor RG timing may not be
within specification.
8.1.3
Genlock – Field Lock
Select the mode required using the encoder control or left – right keys.
•
Crash
: Sets the unit to lock near instantaneously to the field information of an applied
genlock video input. This is the normal mode of operation.
•
Line Drop
: Sets the unit to lock to the field information of an applied genlock video input by
moving the outputs one line nearer to the genlock video input every 5 fields until the unit is
locked. This mode is useful if the instant locking of the crash mode is found to upset any
downstream equipment.
•
Slow
: