The User Interface of the SDG1000X series can be somewhat confusing in the display of LOAD values:
If a load of 50-999 ohms is entered, that value is shown properly. Good.
But if a load of a few kohms is entered
the value is rounded to a single significant digit for display. So entering "2700" reads"3K". But the instrument actually operates using the full entered value. This is rather misleading:
- There is no way to spot a mis-typed entry,
- The output voltage does not appear to correspond to the displayed load.
Above 10K it displays two significant digits, which is a bit better but still ambiguous -- entering "10.7K" will display "11K", and so on.
There is plenty of room on the LCD to display the full value. So this seems like a simple firmware fix, which I hope Siglent will include in an upcoming release.
[Edit to add examples and illustrations]
Here is a simple set of operations starting with the generator set to output 5.000 Vpp into 50 ohms, that illustrates the issue:
Case 1 setup: The load is set to 2501 ohms. This is shown in the first shot, just prior to pushing the ohms soft key.
Case 1 result: The load reads 3K ohms. The output voltage is 9.805 Vpp. See the second shot.
Case 2 setup: The load is now changed to 3499 ohms. See the third shot.
Case 2 result: The load still reads 3K ohms. The output voltage is now 9.860 Vpp. See the final shot.
As mentioned above, this seems simple to fix in firmware by merely displaying the load value as entered. That would eliminate inconsistencies in apparent load value versus actual output voltage.