Get Timing Report And Timing Reply - NEC MultiSync V423 Manual
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Also See for MultiSync V423:
- Installation manual (9 pages) ,
- Specification (4 pages) ,
- Manual (72 pages)
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5.5.2 Get Timing Report and Timing reply.
The controller requests the monitor to report the displayed image timing.
Command code
STX
'0'
'7'
Send "07"(30h, 37h) as Get Timing Report command.
Complete "Get Timing Report" command packet as follows;
ASCII: 01h-30h-41h-30h-41h-30h-34h-02h-30h-37h-03h-CHK-0Dh
SOH-'0'-'A'-'0'-'A'-'0'-'4'-STX-'0'-'7'-ETX-CHK- CR
The monitor replies status as the following format;
Command
STX
'4'
'E'
SS: Timing status byte
Bit 7 = 1: Sync Frequency is out of range.
Bit 6 = 1: Unstable count
Bit 5-2
Bit 1
Bit 0
H Freq: Horizontal Frequency in unit 0.01kHz
V Freq: Vertical Frequency in unit 0.01Hz
Ex.) When H Freq is '1''2''A''9' (31h, 32h, 41h, 39h), it means 47.77kHz.
ETX
SS
Hi
Lo
MSB
Reserved (Don't care)
1:Positive Horizontal sync polarity.
0:Negative Horizontal sync polarity.
1:Positive Vertical sync polarity.
0:Negative Vertical sync polarity.
H Freq.
LSB
MSB
(18/72)
V Freq.
ETX
LSB
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