Doremi HDG-20 User Manual download pdf (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

Doremi Labs

1 2 ... 9 10 11 12 13 14 15 16 17 18 19 ... 23 24

No comments

Doremi HDG-20 User Manual Page 14