Ross SRG-4400, User Manual

Page: 113 / 193

SRG-4400 User Manual (Iss. 06) Menu System • 5–59
Calibration Menu
The Calibration menu appears below:
Figure 5.30 Calibration Menu Example
Enable Adjustments
This menu line enables the user to change any of the calibration settings in the remainder of this
menu.This menu option is always set to “No” upon entry - it requires a conscious action on the
part of the user to set the option to “Yes” and thereby enable calibration value adjustments.
The options are:
• No — Calibration is disabled (Default). The user may view the menu values at any time.
• Yes — Calibration is enabled. The user is able to change any of the preset values.
Oven Frequency
This menu line allows the user to adjust the frequency of the internal 10MHz oscillator.
When the SRG-4400 is configured for Internal Lock (refer to the section “ Genlock Menus ” on
page 5-34), the video outputs on the SRG-4400 will “free run” compared to an external video
signal from a known reference.
To set the 10MHz oscillator
1. View both the Composite output and the known reference on a vector scope.
2. On the vector scope, ensure that the known reference is also looped through to the EXT
REF input, and that the EXT REF function is enabled.
3. Adjust the “Oven Frequency” menu value so that the Composite video output signal
rotates at less than 1 cycle/second compared to the known reference.
When the SRG-4400 has a GPS receiver installed and enabled, this value is automatically
adjusted by the SRG-4400, using embedded clock data in the GPS signal.
This setting varies from unit to unit.
Important
— The Calibration menu contains fundamental settings relating to the
functionality and accuracy of the SRG-4400. These settings are programmed during initial
testing, configuration and alignment. Under normal circumstances, it should not be necessary
to adjust any of these settings after the unit has been installed.
It is a good idea to make a manual record of these settings in case they become corrupted or
are inadvertently changed. A convenient way to achieve this is to print this page, record the
stored values alongside the respective menu lines, then store the list in a safe place.
PAL SCPhase 0000 =
PAL HGenlockPoint 0000 =
PAL OPScH 000 =
PAL IPSCH 000 =
Oven Frequency +00000 =
Enable adjustments No =