Agilent Technologies 35670-90066 manual Serial Port, Agilent 35670A, A10 Rear Panel, Signal Name

	Agilent 35670A	Voltages and Signals
		A10 Rear Panel
DIO1 — DIO8	Data Input/Output — These are inverted data lines that conform to IEEE specification
	IEEE-488. When ATN is low, these lines contain interface commands. When ATN is high,
	these lines contain data.
EOIn	End or Identify — If ATN is high, a low on this line marks the end of a message block. If
	ATN is low, a low on this line requests a parallel poll.
IFCn	Interface Clear — This line goes low to halt all current operations on the bus, unaddress all
	other devices, and disable serial poll. The system controller becomes the controller in charge.
	This line is only used during the analyzer’s developement.
NDACn	Not Data Accepted — This line goes high when the DIO lines have been latched by
	the acceptor.
NRFDn	Not Ready for Data — This line goes high when the acceptor is ready to accept data.
RENn	Remote Enable — This line is low when the GPIB has control and high during local operation.
SRQn	Service Request — This line is low when a device on the GPIB needs service.

Serial Port

The following table lists signals at the Serial Port connector (A10 J101). The Serial Port is a 9-pin EIA-574 port that is only available using Instrument Basic. A description of each signal follows the table.

Signal Name	Pin
DSR	6
DTR	1
RTS	4
RxD	3
TxD	2
Logic Gnd	7
Not Used	5, 8-9

DSR	Data Set Ready — Some devices check this line for a high to verify that the analyzer is
	connected and ready. The user can set this line high or set this line to go high only when the
	analyzer is ready for data transfer.
DTR	Data Terminal Ready — This line is tied high. Some devices check this line for a high to
	verify that the analyzer is connected and ready.
RTS	Request To Send — This line is tied high. Some devices require this line to be high before
	transferring data.
RxD	Receive Data — This is the serial EIA-574 receive data line. This line transmits data from
	peripheral devices one byte at a time.
TxD	Transmit Data — This is the serial EIA-574 transmit data line. This line transmits data to
	peripheral devices one byte at a time.

9-15