Tektronix Keithley 2651A Reference Manual page 828

Section 11: Maintenance
Upgrading the firmware
You can load a newer or older version of firmware to the instrument. The process takes about five
minutes.
To load the firmware, you can use a USB flash drive or select a file from a computer.
From the front panel, you must use the USB flash drive. Make sure the USB flash drive is empty
except for the firmware file.
From the web interface, Test Script Builder, or remote interface, you can select the file from the
computer.
Firmware files are available for download from the
(tek.com/product-support) in the category "Software." After downloading the file, unzip the file. The file
with the extension .x is the firmware file.
Disconnect the input and output terminals before you upgrade or downgrade.
Do not remove power from the instrument or remove the USB flash drive while an upgrade or
downgrade is in progress. Wait until the instrument completes the procedure and shows the
opening display. If you are upgrading an instrument with no front panel (NFP), the LAN and
1588 LEDs on the front panel blink in unison during the upgrade and stop when the upgrade
is complete.
Do not initialize or reset TSP-Link before starting the upgrade.
If you are loading an older version, check the release notes and verify that the version of
firmware you are loading is compatible with your hardware.
Before starting the upgrade, turn the instrument power off, wait a few seconds, then turn the
instrument power on.
To upgrade or downgrade the firmware using the front panel:
1. Turn the instrument power off. Wait a few seconds.
2. Turn the instrument power on.
3. Copy the firmware file to a USB flash drive.
4. Disconnect the input and output terminals to and from the instrument.
5. If the instrument is in remote mode, press the EXIT (LOCAL) key once to place the instrument in
local mode.
6. Insert the flash drive into the USB port on the front panel of the Model 2651A.
11-4
Model 2651A High Power System SourceMeter® Instrument Reference Manual
Product Support and Downloads web page
2651A-901-01 Rev. C October 2021