I am running 5.15.6. I have tried it on two systems, with the same results both times. When I do Help-->About, I get the following:
Release 5.15.6 - 32 bit
Driver Version: 1, 7, 0, 2
USB Version: 2.0
Hardware Version: 4
Hardware Model: 2105
Serial Number: JAL82/78
Calibration Date: 20Nov06
Error Code: 0
picopp.sys Version: 1.12
Some more data points:
If I set the trigger to -25%, the display goes to showing a 1 KHz signal with a peak at 4 KHz (4 times the correct value). If I set the trigger to -10%, the spectrum shows the peak at 10 KHz (10 times the correct value). At -5%, it shows up at 20 KHz, at -1%, it shows up at 100 KHz, etc. This pattern seems to follow for all values in between, till the trigger is at zero, (at zero the spectrum is OK). In all cases, it is flashing between being correct and the wrong setting, with the wrong setting showing about 70% to 80% of the time.
Given the apparant resolution on the spectrum display, my guess is that it is actually correct data, but the display routine is stretching it out and only showing the first 10% of the real data that was calculated (in the case of the -10% trigger). Also, in all these tests, the scope display looks normal.
I have included a snapshot and psd file for the -10% case.
- psd file for Pcio 2105 with trigger at -10%
- (24.11 KiB) Downloaded 283 times
- Spectrum on 2105 with trigger at -10%
- (41.8 KiB) Downloaded 1364 times