Keithley 2461 Reference Manual

Section
2: General operation Model 2461 Interactive SourceMeter® Instrument
Reference Manual
2-14 2461-901-01 A/November 2015
Communications indicator
The communications indicator displays the type of communications the instrument is using. Press the
indicator to display the present communications settings. Press the Change Settings button at the
bottom of the dialog box to change the settings. Refer to Remote communications interfaces for detail
on the options that are available.
Figure 9: Communications indicator expanded
Indicator Instrument communication
Local
Instrument is controlled from the front panel
GPIB
Instrument is communicating through a GPIB interface
TCPIP
Instrument is communicating through a LAN interface
VXI-11
Instrument is communicating using VXI-11
USBTMC
Instrument is communicating through a USB interface
Telnet
Instrument is communicating through Telnet
TSP-Link
Instrument is communicating through TSP-Link
Slave
Instrument is a subordinate in a TSP-Link system
Communications activity indicator
The activity indicator is located to the right of the communications indicator. When the instrument is
communicating with a remote interface, the up and down arrows flash.
Figure 10: Communications indicator
If a service request has been generated, SRQ is displayed to the right of the up and down arrows. You
can instruct the instrument to generate a service request (SRQ) when one or more events or
conditions occur. This indicator stays on until the serial poll byte is read or all the conditions that
caused SRQ are cleared.

Keithley 2461 Specifications

General

Maximum Current	7 A
Power	100 W
Resolution	6.5 digits
Source Measure Unit (SMU)	Yes
DC Voltage	100 V
Maximum Voltage	100 V
Display	5-inch capacitive touchscreen
Connectivity	USB, GPIB
Software	TSP
DC Current	7 A
Current Source Range	0 to 7 A
Voltage Measurement Range	100 mV to 100 V
Current Measurement Range	10 nA to 7 A
Voltage Measurement Resolution	100 nV