All,
I had loaned my PCSU1000 to a colleague and it was just returned. Int he interim, I set up a new computer. I installed the drivers, etc., then calibrated the oscope. The program reported that the calibration failed, and when I looked in calibration.log, I saw one failed entry, specifically:
CH2 Y-position low : 32
CH2 Trigger : 64
CH2 Trigger : 34
CH2 Trigger low : 49 OK
CH2 Y-position mid : 32
CH2 Trigger : 62
CH2 Trigger : 32
CH2 Trigger middle : 47 FAIL
CH2 Y-position high : 223
CH2 Trigger : 147
CH2 Trigger : 120
CH2 Trigger high : 134 OK
I reran the calibration and received the same result.
Questions:
1: What is the range of acceptable values for the failed one?
2: What can be done to fix the problem?
3: What impact would there be to any data collected if the problem were not fixed?
Thank you.
This is very strange problem. The reason may be some unknown compatibility problem.
According to the acceptable results the hardware seems to be OK.
There seems to be problems in the middle position calibration of Ch2 only.
The range of acceptable values for the “CH2 Trigger middle” is:
“CH2 Trigger low”+15 … 200.
You may manually fix the problem.
Locate the file WinDSO.ini and open it in a text editor.
The following lines should look about like these:
[Calibration_1000]
trg_ch1_min=48
trg_ch1_mid=91
trg_ch1_max=134
trg_ch2_min=48
trg_ch2_mid=92
trg_ch2_max=134
trg_ext_mid=49
...
Ch1_pos0=126
Ch1_pos1=32
Ch1_pos2=224
Ch2_pos0=126
Ch2_pos1=32
Ch2_pos2=221
Ch1_ad0=121
Ch1_ad1=76
Ch1_ad2=166
Ch2_ad0=119
Ch2_ad1=74
Ch2_ad2=163You may manually change the values that significantly differ from these.
I think the problematic lines you have to edit are:
trg_ch2_mid=92
Ch2_pos0=126
Ch2_ad0=119
If you have Windows Vista then the file WinDSO.ini can be located in the folder:
C:\Users[username]\AppData\Local\VirtualStore\Program Files\Velleman\PcLab2000SE
In Windows XP the file is located in the folder:
C:\Program Files\Velleman\PcLab2000SE
You may also copy from your original WinDSO.ini the section [Calibration_1000] and post here.
This is just a guess: Maybe your new PC is a very fast one and the PCSU1000 software/hardware fails in some operations during the calibration.
If possible, you may try to reduce the speed during the calibration by selecting a power saving mode in your PC…
VEL255
Thank you - I made the changes your suggested and we’ll see what happens.
FYI: Good guess! This is a very fast (3.6 GHz) Windows 7 x64 machine.