Series 3700A System Switch/Multimeter Reference Manual
Section 2: Installation
3700AS-901-01 Rev. D/June 2018
2-15
GET
The group execute trigger (GET) command is a GPIB trigger that triggers the instrument to take
readings from a remote interface.
SPE, SPD
Use the serial polling sequence to obtain the Series 3700A serial poll byte. The serial poll byte
contains important information about internal functions (see
C-3)). Generally, the serial polling sequence is used by the controller to determine which of several
instruments has requested service with the SRQ line. The serial polling sequence may be performed
at any time to obtain the status byte from the Series 3700A.
Configure the GPIB controllers
Each instrument on a GPIB bus needs a unique address from a range of 0 to 30. Generally, the GPIB
host controller is on address 0. However, there are GPIB controllers that adopt the address of 21. To
be safe, do not configure any of the instruments for 21 or 0.
If you do need to change the host controller address, consult the controller documentation.
For the KPCI-488LPA and KUSB-488B GPIB controller from Keithley Instruments, the configuration
utility is called the KI-488 Diagnostic Tool. It is available from the Microsoft
®
Windows
®
Start menu at
Keithley Instruments > KI-488 > KI-488 Diagnostic Tool
.
For the KUSB-488A GPIB controller from Keithley Instruments, the configuration utility is called GPIB
Configuration. It is available from the Windows Start Menu at
Keithley Instruments > GPIB-488 >
GPIB Configuration
.
For National Instruments (NI
TM
) GPIB controllers, you can use NI-MAX. Start NI-MAX. If your
hardware is installed correctly, you will see the controller in the GPIB section of the tree control on the
left side. Select it and right-click to see an option to configure the controller. Do not forget to save
your settings.
Communication status indicators
The remote (REM), talk (TALK), listen (LSTN), and service request (SRQ) indicators show the
communication bus status. Each of these indicators is described below.
Status indicator
Applies to
REM
GPIB, VXI-11, USB
TALK
GPIB only
LSTN
GPIB only
SRQ
GPIB, VXI-11, USB
The SRQ applies to all available communication buses, however, actual service requests only apply
to GPIB, USB, and VXI-11 (see
Status byte and service request (SRQ)
(on page C-15) for more
information).
REM
This indicator is illuminated when the instrument is in the remote control state. When the instrument is
in the remote control state, all front-panel keys, except for the EXIT (LOCAL) key, are locked out.
When REM is off, the instrument is in the local control state and front-panel operation is restored.
