Side-Power 8981 Manuel d'instructions télécharger pdf (Page 20)

14 8981FS Instruction Manual

8981FS Digital Frame Synchronizer Module

Any time the module enters the freeze mode horizontal (HANC) or vertical

(VANC) blanking interval embedded data will be removed and replaced by

black level data. This applies to both momentary freezes due to input

timing steps and manually initiated frame or ﬁeld freezes. This does not

apply to EDH check words that are always recalculated and inserted in the

output signal.

Switching Line Handling

The industry standard video signal line where routing switchers should

switch (10/273 (525), 6/319 (625) can be replaced by black to remove

switching transients. Transients will occur when serial digital signals are

switched even if the signals are perfectly timed (see Table 3 on page 15,

Function Switch position 5, Bank 1).

If BLANKED is selected, the nominal switching line, the H blanking

interval after it, and the ﬁrst half of the following line will be replaced by

black. This will not affect any embedded audio because the H blanking

interval after the switching line should not contain any audio data.

Vertical Interval Blanking

Vertical interval active line time data can be replaced by black if desired.

This function blanks the active line time but does not interfere with any

horizontal blanking interval embedded data. The number of lines blanked

can be set to 20 or 21 in 525 to remove closed captioning. If the Vert

Blanking Data mode setting is set to PASS, all vertical blanking interval

data will pass through the module (see Table 3 on page 15, Function Switch

position 4, Bank 1 and position C, Bank 2).

Store/Retrieve Conﬁguration Settings

All user conﬁguration settings are automatically stored in non-volatile

memory a few seconds after any change. If power is lost these settings will

be recalled at power up to return the unit to its previous conﬁguration. The

user can also store conﬁguration settings at a different memory location for

later recall. There are also factory default settings that can be recalled to

return all parameters to known settings. Table 3 on page 15, Function

Switch positions D and E, Bank 2) The function settings after a recall of

factory defaults is also indicated in Table 3. The output signal will be timed

to match the reference signal in Frame Synchronizer mode after a recall of

factory defaults.

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Side-Power 8981 Manuel d'instructions Page 20