Rohde & Schwarz NRT 1080.9506.02/.62, Руководство по эксплуатации

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IEC/IEEE Bus Interface NRT
1080.9506.02 A.2 E-4
2. Control bus with 5 lines
IFC (Interface Clear),
active LOW resets the interfaces of the instruments connected to the default setting.
ATN (Attention),
active LOW signals the transmission of interface messages
inactive HIGH signals the transmission of device messages.
SRQ (Service Request),
active LOW enables the connected device to send a service request to the controller.
REN (Remote Enable),
active LOW permits switchover to remote control.
EOI (End or Identify),
has two functions in connection with ATN:
ATN=HIGH
active LOW marks the end of data transmission.
ATN=LOW active LOW triggers a parallel poll.
3. Handshake bus with three lines
DAV (Data Valid),
active LOW signals a valid data byte on the data bus.
NRFD (Not Ready For Data),
active LOW signals that one of the connected devices is not ready for data transfer.
NDAC (Not Data Accepted),
active LOW signals that the instrument connected is accepting the data on the data bus.
Annex A.1.3 Interface Functions
Instruments which can be remote controlled via IEC bus can be equipped with different interface
functions. Table A-1 lists the interface functions valid for the NRT.
Table A-1 Interface functions
Control
character Interface function
SH1 Handshake source function (source handshake)
AH1 Handshake drain function (acceptor handshake)
L4 Listener function
T6 Talker function, ability to respond to serial poll
SR1 Service request function
PP1 Parallel poll function
RL1 Remote/Local switchover function
DC1 Reset function (Device Clear)
DT1 Trigger function (Device Trigger)
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