Ross 4500DR-104-07, User Manual, Page: 74 / 161

74 • Front Panel Menu System SRG-4500 User Guide (v7.0)
• VITC — Locks to VITC on an external CVBS video signal
• MHz Lock — Locks to an external frequency reference signal
• GPS F+Phase Lock — Locks to a GPS signal from a connected antenna
• GPS Freq Lock — Locks to a GPS signal from a connected antenna
The “GPS” and “NTP” Lock options are only available when these options are enabled.
Unlock Mode
This menu line allows the user to select the required action when reference is restored in Genlock mode. The
options in the field are:
• Internal Lock — Locks to the internal 10MHz oscillator
• Relock — Re-locks to an external reference
Lock Status
This menu line reports the status of the Genlock system. For video and frequency lock modes, the options in the
field will appear as:
• Internal Lock — appears under two conditions: when the SRG-4500 is set for Lock Mode = Internal Lock, and
when Lock Mode = GVITC) and the external reference is absent.
• Lost Lock — appears when the SRG-4500 detects that the external Genlock video reference has changed, is
missing, or of an unrecognized format.
• Locking — displays while the SRG-4500 is actively Genlocking to the external Genlock video reference.
• Locked — displays when the SRG-4500 has successfully Genlocked to the external Genlock video reference.
• Locked to 10MHz — displays when the SRG-4500 has locked to the external 10MHz frequency reference.
Additional options will appear in the field, mirroring a subset of the field options detailed in the following sections.
Ref Signal
If an external Genlock reference is present, details regarding the format of the reference are displayed in this menu
line.
The options in the field will appear as:
• No signal
• 525 NTSC59.94i
• 625 PAL 50i
GPS Status
This menu line reports the status of the GPS system. The options in the field will appear as:
• Option is Off — appears when GPS Lock Mode has been selected, and the option is not enabled.
• Acquiring GPS — displayed when the SRG-4500 is actively searching for satellites and locking to the time
information within the GPS signal.
• xLocked to GPS — (where x = t, i, a or p) is displayed when the SRG-4500 has successfully locked to the
pre-selected mode of GPS Locking (the display progresses in sequence, as listed):
› tLocked to GPS GPS Time Locked
› iLocked to GPS Basic Frequency acquired
› aLocked to GPS Better Frequency acquired
› pLocked to GPS GPS Phase Locked