DigiDesign SYNC HD, Manual

Page: 72 / 103

SYNC HD Guide 66
Warm Up the SYNC HD Before Recalibrating
Before you begin the calibration procedure,
power on the SYNC HD and allow it to warm up
for at least five minutes. The temperature of the
room (or chassis) isn’t critical during the calibra-
tion procedure. However, if you need better
than 3 ppm accuracy, it is recommended that
you allow the SYNC HD to warm up for at least
30 minutes and that the chassis be at normal op-
erating temperature.
The original Oscillator Calibration value is
printed on the factory sticker, on the SYNC HD
bottom panel.
To restore the SYNC HD oscillator calibration to
its factory setting:
1
Press Set, then press Up until Video System
(VIdEo SY) is displayed in the LED readout.
2
With the LED Time Code Display showing
VIdEo SY, press and hold the Up switch. While
you continue to hold that switch, press the
Clock Reference switch momentarily, and then
release both switches. The LED Time Code Dis-
play will read:
3
Press Set again. The LED Time Code Display
shows the current parameter value, which
shows a sample rate frequency deviation from
–0999 to 0999.
4
Take note of the Oscillator Calibration value
printed on the factory sticker, on the SYNC HD
bottom panel.
5
Use the Down and Up switches to scroll
through the parameter values.
6
When you reach a value that matches the
sticker’s value, stop scrolling and press Set. The
LED Time Code Display will return to showing
time code numbers. The SYNC HD is now prop-
erly calibrated.
The next time you press Set, the LED Time Code
Display will again show O5C CAL. If you then
press the Down switch, you’ll disengage the Os-
cillator Calibration parameter name. To change
the setting once again, you’ll need to repeat
steps 1 through 6.
Restoring Factory Settings
The SYNC HD can be reset to its default factory
settings.
To reset all parameters to default settings:
1
Switch off power to the SYNC HD and wait at
least 10 seconds.
2
Hold down the Up and Down front panel
switches and turn on power to the SYNC HD.
Do
not release the Up and Down switches until
the display reads FAC-CFG.
Resetting factory settings does not reset the
SYNC HD oscillator. See “Calibrating the
SYNC HD Oscillator” on page 65 for infor-
mation.