Doremi HDG-20 - Manual (Page 14)

4 Operational Hints
4.1 Circle and Target patterns
The Target 16/9 pattern is based on a square pixel ratio for high definition formats. The Target
4/3 pattern is based on 11/10-pixel ratio in NTSC and 54/59-pixel ratio in PAL.
The Circle pattern is based on a square pixel ratio for all formats. Since NTSC and PAL do not
have a square pixel ratio, the circles will look like ellipses on standard definition CRT monitors.
4.2 Crosshatch
Crosshatch pattern are usually made with 2 consecutive lines, one on each field. On the HDG
product line we intentionally made the crosshatch with lines showing only on Field-1 so it can be
used to identify problems related to field inversion.
4.3 Border Lines
Border Lines can be used to find if a device is displaying all lines and pixels. It has 8 colors, 2
pixels (or 2 lines) each to make a total of 16 pixels (or 16 lines) on every side of the image.
4.4 Burn In Window
The Burn In Window shows the timecode in 00:00:00:00 format. The character separating the
seconds from the frames can be used to identify Field-1 from Field 2 for interlaced formats. It
can also be used to identify drop and non-drop formats. Example:
 00:00:01.04 indicates a non drop timecode for Field-1 interlaced
 00:00:01:04 indicates a non drop timecode for Field-2 interlaced
 00:00:01,04 indicates a drop frame timecode for Field-1 interlaced
 00:00:01;04 indicates a drop frame timecode for Field-2 interlaced
4.5 Genlock parameters
Each video format has its own set of HTRIG, VTRIG and Inv Fields values. They are saved to
flash using the 06 SYSTEM > Save Settings sub-menu. If you use a bi-level sync source and
keep switching between NTSC and 1080i for example, you don’t need to keep adjusting the H
and V settings every time you change the output. You would adjust each format, with that same
input, once, and save the settings to flash.
Changing the Sync input signal format will require re-adjusting the H and V values.
HDG.OM.000248.DRM Page 14 of 24 Version 1.6
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