Unknown Terminals; Front Usb Port - Keysight E4980A User Manual

Overview
Front Panel: Names and Functions of Parts
Regardless of which page is displayed, when the DC SOURCE key is
pressed, the value that has been set in the DC SRC field of MEAS SETUP is
output. For example, in case that DC SRC sweep has been set with the
LIST SWEEP DISPLAY page displayed, the value set in the DC SRC field is
output when the DC SRC key is pressed. Then, after the E4980A/AL is
triggered, the DC Source is set according to the list that has been set.

12. UNKNOWN terminals

These are the UNKNOWN terminals used to connect a four-terminal pair test
fixture or test leads for measuring the device under test (DUT).
When using a four-terminal pair test fixture or test leads with a stopper,
remove the stopper or the bumper of the E4980A/AL.
Do not apply DC voltage or current to the UNKNOWN terminals. Applying
DC voltage or current may lead to device failure. Connect the
measurement sample (DUT) to the test port (or the test fixture, cables, etc.
connected to the test port) after the LCR meter has been completely
discharged.
The maximum load the UNKNOWN terminals can withstand is 10 kgf
(nominal).
The test ports comply with Installation Category I of IEC 61010-1.

13. Front USB port

This port is used to save data in a USB memory. The USB indicator lights up
while accessing the USB memory.
Connector types: Universal Serial Bus (USB) Jack, Type A (four contact points),
Female.
Compliance Standards: USB 1.1
Do not connect any device other than a USB memory to the USB port. We
do not support connections to the USB port of printers, devices with a
built-in HDD, or USB hubs. To print a screen, refer to
into USB memory" on page
Do not unplug the USB memory while the USB indicator is on.
Keysight E4980A/AL Precision LCR Meter
184.
"To save a screenshot
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