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Chapter 6
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EMOTE
I
NTERFACE
6.1 INTRODUCTION
The 4176 is a fully interactive automatic measurement system. Communication between
the 4176 and host computers is easily accomplished. The standard RS232 interface or
optional GPIB and USB interface provide the capability to automate testing, retrieve
actual resistance readings in different formats, retrieve temperature measurements, log
data, and also calibrate the 4176.
6.2 CONNECTING THE 4176 VIA GPIB INTERFACE
6.2.1 The GPIB interface capabilities:
The GPIB interface of the 4176 corresponds to the standard of IEEE488.1-1987,
IEEE488.2-1992 and SCPI-1994. The GPIB interface functions are listed as follows:
SH1(Source Handshake):
The 4176 can transmit multilane messages across the
GPIB.
AH1(Acceptor Handshake): The 4176 can receive multilane messages across the GPIB.
T6(Talker):
Talker interface function includes basic talker, serial poll,
and unaddress if MLA capabilities, without talk only mode
function.
L4 (Listener):
The 4176 becomes a listener when the controller sends its
listen address with the ATN (attention) line asserted. The
power supply does not have “listen” only capability.
SR1 (Service Request):
The 4176 asserts the SRQ (Service request) line to notify
the controller when it requires service.
RL1 (Remote/Local):
The 4176 responds to both the GTL(Go to Local) and
LLO(Local Lock Out) interface messages.
PP0 (Parallel Poll):
The 4176 has no Parallel Poll interface function.
DC1 (Device Clear):
The 4176 has Device clear capability to return the device to
power on status.
