Keysight Technologies B1505A User Manual page 60

CAUTION
Introduction
Rear View
The Zero Check terminal can be used for the service purpose only. For the normal
operation, leave this terminal open and do not connect anything to this terminal.
Connecting anything can damage the instrument.
8. GNDU terminal
0 V constant voltage source. Used for the reference of measurement ground.
Triaxial connector.
9. LAN interface
RJ45 connector.
10. USB interfaces
USB, 2 ports. For keyboard, mouse, or peripherals.
To remove USB devices from the instrument, use "Safely Remove Hardware"
on Windows taskbar. If it is not used, the instrument may cause the internal USB
communication error. If the error occurs, turn the instrument off and disconnect
the power cable from it. Leave it about 30 seconds before rebooting it, and
connect the power cable again, and then turn the instrument on.
11. Ext Trig terminals
Two BNC connectors, one for trigger input, and one for trigger output. For
details about the trigger function, see Keysight B1500 Programming Guide.
12. Digital I/O terminal
DSUB 25 pin connector. Can be used for the trigger input/output terminals or an
interface to control an external relay circuit and so on. For details, see Keysight
B1500 Programming Guide. This connector is also used to connect module
selector, test fixture, or expander.
13. Interlock terminal
Used in conjunction with the interlock function of the instrument. If the
Interlock terminal is open, maximum SMU output is limited to ±42 V and
UHVU output is disabled. Be sure to connect this terminal to the interlock
circuit of the test fixture or the prober station before performing measurement.
To verify the interlock function, perform the Interlock Open/Close test on the
Main Frame tab screen of the EasyEXPERT Configuration window.
2-14 Keysight B1505A User's Guide, Edition 12