DVDO AVLab TPG - 4K Test Pattern Generator
DVDO AVLab TPG
43
A.04
Appendix A: Virtual Serial Command Protocol
Virtual Serial over USB:
Using a specific virtual serial driver, AVLab-TPG will be connected to a laptop running Calman and able to
bring up specific test patterns on command. AVLab-TPG will emulate Duo for these commands according
to the following table:
Note that final spec is to function with Calman 5
Baud Rate
115200 (default)
Data Bits 8
Parity
None
Stop Bits 1
Flow Control None
The protocol is based on ASCII characters. Four ASCII non-printable control characters are used.
ASCII
Hex
Description
NULL
$00
Ignore or End of String
STX
$02
Start of text
ETX
$03
End of text
SPACE
$20
‘Space’ key on keyboard
The list of all ASCII characters used by the iScan Duo serial automation protocol and their hexadecimal
equivalent values are given in Section 9.
Each transaction from either the system controller or the iScan Duo has the following formats
STX [Transaction Type] [Data Count] [ID] NULL [Value] NULL ETX
STX [Transaction Type] [Data Count] [ID] NULL ETX
Summary of Contents for AVLab TPG
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