Extron Electronics IN1700 - Manual (Page 13)

11
IN1700 Operation Manual - Preliminary 06/23/00 © 2000 - INLINE, INC.
The exception to this rule is the response to the RST command. The RST command resets the
unit to the factory default serial control settings which are a baud rate of 9,600 and [ ]
command delimiter codes. The two possible responses to the RST command are:
[OK] Valid command received
[E1] Invalid command or parameter
Status Command
The [STAT] command lets you query the IN1700 to determine all current settings. The
[STAT] command may be useful to help syncronize a control system to the current IN1700
settings. When the [STAT] command is sent to the IN1700, the unit will respond with an 11
byte response that indicates the current device settings as indicated below:
Start Character byte 0
Baud Rate byte 1 ‘0’ = 2,400, ‘1’ = 4,800, ‘2’ = 9,600, ‘3’ = 19,200
Front Panel Disable byte 2 ‘1’ = enable, ‘0’ = disable
Freeze byte 3 ‘1’ = on, ‘0’ = off
Zoom byte 4 ‘1’ = on, ‘0’ = off
Overscan byte 5 ‘1’ = overscan on, ‘0’ = off (underscan on)
Flicker byte 6 indicates ‘1’, ‘2’, ‘3’ settings
Flicker byte 7 indicates ‘A’, ‘B’ settings
Input Termination byte 8 ‘1’ = 75 Ohms, ‘0’ = Hi-Z
PAL / NTSC Output byte 9 ‘1’ = PAL Output, ‘0’ = NTSC Output
Output format
byte 10 ‘0’ = RGBHV, ‘1’ = RGBS, ‘2’ = Component, ‘3’ = S-Video
Stop Character byte 11
Getting the Best Image From Your Scan Converter
Beginning with a quick overview on the differences between computer video signals and
conventional video signals, this section concludes with several tips to help you get the best
looking images from your scan converter.
REGULAR VIDEO & HIGH-RESOLUTION VIDEO - WHAT’S THE DIFFERENCE?
Users are sometimes surprised when the scan-converted image displayed on a conventional video monitor
has lower quality than the original VGA or MAC signal displayed on their computer monitor. There are
several reasons for the image quality loss, the main one being the vast differences between the two types of
signals. VGA / MAC to video converters such as the IN1700 have the difficult job of converting a non-
interlaced, high-resolution image with precise colors into an interlaced, lower resolution image with a more
limited choice of colors.
Resolution - When compared to regular video signals that you see on your home TV, computer
video signals usually have a higher resolution (a higher number of pixels, or picture elements,
make up the image). This means that the scan converter must actually throw away some of the
VGA or MAC picture information and detail in order to transfer the image to a conventional
monitor. This problem is more noticeable in the United States and other countries using the
NTSC video standard because the picture has 100 fewer lines of picture information than the PAL
video standard.