Miranda ASD-231i, Инструкция по установке и эксплуатации

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Forced Input Format Selection
This mode allows you to select one of the input formats. During this mode of operation, the ASD-
231i remains configured with the format selected at all times regardless of the input signal’s
format. If the input signal’s format is other than that selected, the IN LED will turn on. This
feature is handy when you are certain that the input format will not change. To select the forced
input for forced input detection, follow these steps:
1. Press SELECT to enter the menu. FRMT is displayed.
2. Press SELECT to enter the FRMT menu. The current format is displayed.
3. To force an input format, use the UP(+) or DOWN(-) push-button to select between NTSC,
PAL, PALM (PAL-M), PALN (PAL-N), SECM (SECAM), and BW (monochrome).
4. Press SELECT to store the new forced input selection. FRMT is displayed.
5. To return to normal mode, press ESCAPE.
Monochrome Input Signal
When working with monochrome input signals, set the FRMT menu to BW to accept a black and
white input. Selecting BW forces the ASD-231i to disable decoding of the input signal. During
BW mode, automatic detection is made between 525- and 625-line formats. Detecting a 525-line
format signal will load the NTSC format and a 625-line format will load the PAL format.
3.6 Decoding Filter
The ASD-231i provides the 5 types of decoding filters which are listed in Table 3.1. The selection
of a decoding filter will depend highly on the nature of the input composite signal. For example,
choosing between A-3D and A-2D will depend highly on the content of your source. Most
artifacts will disappear with A-3D but a ghosting effect may appear with moving images. On the
other hand, A-2D may be more adept with fast moving images. The best way to decide which
decoding filter to use is to try out each one and compare their performances with the actual
source.
Table 3.1 Available decoding filters and recommended usage
Decoder Application
A-3D Static images requiring optimum performances (adaptive)
A-2D Fast moving images requiring optimum performances (adaptive)
3-D Static images (non-adaptive)
2D Fast moving images (non-adaptive)
SPLT Lower quality source
AUTO Bandsplit filter for unstable VCR signals
Adaptive luma comb decoding for stable VCR signals
N.B.: There is no filter selection available during SECAM operation.
3.7 Timing
When the ASD-231i is set to STUDIO source type and there is no reference signal installed, it
operates in Frame Delay/Frame Buffer mode: the timing adjustment sets the processing delay
between the
input and output signals. Note that when operating in Frame Delay/Frame Buffer
mode, the minimum vertical timing adjustment value is fixed by the number of processing steps
selected (see table 3.2 for details) . However, when a reference signal is installed, the ASD-231i