GUIDE TO INSTALLATION AND OPERATION
16
| HCO-1822
In1->In2
Click the checkbox to force all alarm parameters for input 2 to
match those set for input 1.
•
When this is selected, only one set of alarm parameters
is displayed for both inputs.
•
When the checkbox is deselected, the alarm parameters
for input 2 revert to their previous values, i.e. as they
were before the checkbox was selected.
3.4.4 The Timing panel
NOTE: this panel is only available when the Clean Switch Enable checkbox is selected in the Switch panel (see
section 3.4.2).
The PGM output timing, with respect to a detected reference, is programmable from -2 to +2 video lines with
programmable increments at -2, -1, -½, 0, +½, +1, or +2 lines.
In order for no output timing errors to occur, the input source must be synchronized (phased) to within a pre-defined
window. The size of this window will always remain the same length for a given format, but the start and end of the
window is a function of the user-programmed output timing. The size of the window is [2 lines less 12.3
µ
s] for SD
sources and [2 lines less 4.5
µ
s] for HD sources. The following examples illustrate this concept.
•
Example (a) shows the supported input timing window for a user-programmed output timing of +1 line. In order for
the HCO-1822 to guarantee no output timing errors, the input signal must be phased to within -1 line of the
reference signal and +1 line – 12.3
µ
s (SD) of the reference signal.
•
Example (b) shows the supported input timing window for a user-programmed output timing of +½ line. In order
for the HCO-1822 to guarantee no output timing errors, the input signal must be phased to within -1½ line of the
reference signal and +½ line – 12.3
µ
s (SD) of the reference signal.
Notice for both examples, that the size of the supported input range is 2 lines – 12.3
µ
s (SD) and 2 lines – 4.5
µ
s (HD).
Reference
Supported input range
Output timing
1H
1H
1H - 12.3us (SD)
1H - 4.5us (HD)
Reference
Supported input range
Output timing
½H
½H - 12.3us (SD)
½H - 4.5us (HD)
1½H
(a) Output timing = +1H
(b) Output timing = +1/2H
Figure 3.19 Output timing examples
Figure 3.18 IN1 IN2 alarm configuration
