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Appendix B: Interface function codes
Model 6517B Electrometer Reference Manual
Code descriptions
The codes define Model 6517B capabilities as follows:
SH (source handshake function): SH1 defines the ability of the instrument to initiate the transfer of
message/data over the data bus.
AH (acceptor handshake function): AH1 defines the ability of the instrument to guarantee proper
reception of message/data transmitted over the data bus.
T (talker function): The ability of the instrument to send data over the bus to other devices is
provided by the T function. Instrument talker capabilities (T5) exist only after the instrument has been
addressed to talk.
L (listener function): The ability for the instrument to receive device-dependent data over the bus
from other devices is provided by the L function. Listener capabilities (L4) of the instrument exist only
after it has been addressed to listen.
SR (service request function): SR1 defines the ability of the instrument to request service from the
controller.
RL (remote-local function): RL1 defines the ability of the instrument to be placed in the remote or
local modes.
PP (parallel poll function): The instrument does not have parallel polling capabilities (PP0).
DC (device clear function): DC1 defines the ability of the instrument to be cleared (initialized).
DT (device trigger function): DTI defines the ability of the Model 6517B to have readings triggered.
C (controller function): The instrument does not have controller capabilities (C0).
TE (extended talker function): The instrument does not have extended talker capabilities (TE0).
LE (extended listener function): The instrument does not have extended listener capabilities (LE0).
E (bus driver type): The instrument has open-collector bus drivers (E1).
B-2
6517B-901-01 Rev. C / August 2015
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