Agilent Technologies 01664-97005 manual RS-232COptional, RS-232C Signal Definitions

RS-232C(Optional)

The logic analyzer interfaces with RS-232C communication lines through a standard 25 pin D connector. The logic analyzer is compatible with RS-232C protocol. When a hardwire handshake method is used, the Data Terminal Ready (DTR) line, pin 20 on the connector, is used to signal if space is available for more data in the logical I/O buffer. Pin outs of the RS-232C connectors are listed in the following table.

RS-232C Signal Definitions

Pin	Function	RS-232C	Signal Direction and Level
Number		Standard
1	Protective Ground	AA	Not applicable
2	Transmitted Data (TD)	BA	Data from Mainframe
			High = Space = "0" = +12 V
			Low = Mark = "1" = –12 V
3	Received Data (RD)	BB	Data to Mainframe
			High = Space = "0" = +3 V to +25 V
			Low = Mark = "1" = –3 V to –25 V
4	Request to Send (RTS)	CA	Signal from Mainframe
			High = ON = +12 V
			Low = OFF = –12 V
5	Clear to Send (CTS)	CB	Signal to Mainframe
			High = ON = +3 V to +12 V
			Low = OFF = –3 V to –25 V
6	Data Set Ready (DSR)	CC	Signal to Mainframe
			High = ON = +3 V to +25 V
			Low = OFF = –3 V to –25 V
7	Signal Ground	AB	Not applicable
8	Data Carrier Detect (DCD)	CF	Signal to Mainframe
			High = ON = +3 V to +25 V
			Low = OFF = –3 V to –25 V
20	Data Terminal Ready (DTR)	CD	Signal from Mainframe
			High = ON = +12 V
			Low = OFF = –12 V
23	Data Signal Rate Selector	CH/CI	Signal from Mainframe
			Always High = ON = +12 V

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