Ty McKinney

Hello,
You will need the additional adaptor for the 2260B, called the 2260B-GPIB-USB adaptor. 
Also, make sure you have the unit configured to GPIB communicaiton protocol to establish your connection.

See the link below here for the instruction's manual for this adaptor:
2260B-GPIB-USB GPIB to USB Adapter Operation Instructions | Tektronix

See link below for instructions on how to make a connection using this adaptor from the 2260B user's manual on page 144 and on.
Series 2260B Multi-Range Programmable DC Power Supplies User Manual | Tektronix

Hope this helps!

Hello,
To make sure I understand this correctly: Are you wanting to take X number of voltage steps and take ONE current reading per step, then average the current readings only but still report each individual voltage step? EX; 1V, 1A | 2V, 1.5A | 3V 2A... AVERage [1, 1.5, 2]
It is possible to build something that functions equivalently or similarly to how I just described. Reporting the voltage individually against the average current readings will not work. The average function built within the unit is simple in its application but sort of limited to how it can be configured. It will average all of your readings and report one value. i.e. one voltage average and one current average.
 

Hello,
The 2400 SMU will not be able to read as quickly as the 2000 or 2700 due to the 2400 both sourcing and measuring, whereas the other two are multimeters, so they only need to measure.
Some general recommendations I would make to assure the 2400 is reading as fast as possible is to decrease NPLC/PLC to the lowest number (should be 0.01 or FAST), turn autozero off, use a fixed range (autorange OFF), turn all delays OFF or to lowest number possible.

Here is an example using front panel operations to make the fastest voltage sweep possible with the 2400. This may help you in finding other settings to configure to get quicker readings:

1. Press SOURCE V.
2. Press CONFIG, let go. Press SWEEP.
3. Select TYPE, press ENTER.
4. Select STAIR, press ENTER.
5. Enter 0.00000V, press ENTER.
6. Enter 1.00000V, press ENTER.
7. Select Step of 10mV. Press ENTER.
8. Press EXIT.
9. Press SPEED.
10. Select FAST, press ENTER.
11. Press CONFIG, let go, press SOURCE V.
12. Select DELAY, press ENTER.
13. Select 0000.00000 S, press ENTER.
14. Press EXIT.
15. Press CONFIG, let go, press EDIT (Little blue EDIT button on the upper left).
16. Select SWEEP, press ENTER.
17. Press MENU, let go, select A/D CTRL, press ENTER.
18. Select AUTOZERO, press ENTER.
19. Select DISABLE, press ENTER.
20. Press EXIT, EXIT.
21. Press OUTPUT ON/OFF, to enable output.
22. Press SWEEP.
23. Press RECALL.
24. Select the last reading. 100 should be the last reading.
25. Look at the timestamp, Should be around 83msec.
83msec / 100 = 830usec per step.

Hello,
I would increase your limit quite a bit for measuring and see if that works for you.
To reference to your measurement reliability, you can check if the 2450 is within spec by sourcing directly to the SMU with the power supply to verify this voltage measurement.
If you are seeking to measure voltage, sourcing 0nA on lowest range will allow you to measure voltage. This will require you to turn the output ON.
As for the readings you are seeing when the power supply is off, this is normal as there can be many different environmental factors that could give just enough signal to be picked up by our SMU's.
From what I can tell your setup seems to be correct.
Let me know if this information helps!

Support | Tektronix

Hello,
This would be a question and case best handeled by our technical support center. Would you create a case at the link below and reference this forum post? We should reach out to you once we have your information!

Hello,
The DMM4040 is an obsolete and unsupported DMM so the amount of support I am able to give is very limited. I did manage to find the programmers manual found below here, start on page 31 for all accepted SCPI commands.
DMM4040 and DMM4050 | Tektronix

Hello,
As listed in the error message, error code 1135 is a syntax error meaning there is a typo or invalid character somewhere within your program. I would recommend stepping through your script to find the exact command that is throwing this error.
Hope this helps!

Hello,
This script is only for 2636/2635 model to adjust offset current after upgrading 1.4.2 from 1.3.x. The model 2636 has more current ranges in the lower side than 2602. This script is only for the lower range adjustment. So, the script cannot be applicable for 2602 model. If you upgrade 2636, then the script is installed in the instrument but no script for 2602. I think your unit- with 35% offset uncertainty, needs to go to the service team to perform calibration. The Model 2602 is a very old unit, and we are not supporting it in service. But it is confirmed from our service team that we have calibration service only for the 2602.
See link below to help you start this process (US ONLY link attached, see Calibration & Services section on tek.com if out of US).
Service Quote | Tektronix

Hello,
Can you open a ticket with our Tek support team? This looks like it requires individual attention by one of our application engineers. See link below.
Support | Tektronix