NEC MultiSync V422 Control Manual

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NEC MultiSync V422 Control Manual Manual pdf 18 page image

(18/71)5.5.2 Get Timing Report and Timing reply.The controller requests the monitor to report the displayed image timing. 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-0DhSOH-'0'-'A'-'0'-'A'-'0'-'4'-STX-'0'-'7'-ETX-CHK- CRThe monitor replies status as the following format; SS: Timing status byteBit 7 = 1: Sync Frequency is out of range.Bit 6 = 1: Unstable countBit 5-2 Reserved (Don't care)Bit 1 1:Positive Horizontal sync polarity.0:Negative Horizontal sync polarity.Bit 0 1:Positive Vertical sync polarity.0:Negative Vertical sync polarity. H Freq: Horizontal Frequency in unit 0.01kHz V Freq: Vertical Frequency in unit 0.01HzEx.) When H Freq is '1''2''A''9' (31h, 32h, 41h, 39h), it means 47.77kHz.Command codeSTX '0' '7' ETXCommand SS H Freq. V Freq.STX '4' 'E' Hi Lo MSB LSB MSB LSB ETX