Hi all, 

When connecting the board and running the Zadig program, some Windows PCs may return "driver installation failed." I coudn't find the solution from their download website. So I started the drscl first. Apparently it shows: Successfully scanned, but no boards found. Therefore I checked the Device Manager. A breakdown warning triangle appears under the serial port...

The possible solution may be found here.

Infact, the WinUsb driver has been in existence in your PC. One can just follow the instructions here: 

https://docs.microsoft.com/en-us/windows-hardware/drivers/usbcon/winusb-installation 

1. Plug in your device to the host system.
2. Open Device Manager and locate the device.
3. Right-click the device and select Update driver software... from the context menu.
4. In the wizard, select Browse my computer for driver software.
5. Select Let me pick from a list of device drivers on my computer.
6. From the list of device classes, select Universal Serial Bus devices.
7. The wizard displays WinUsb Device. Select it to load the driver.

In the wizard, somehow the default setting displays Microsoft Device on the Top of the list and replaced the WinUsb Device. You can easily re-load the WinUsb Device. Just ignore the WARNING from the device manager. The board should work fine now. 

Willy

I am using a DRS4 Evaluation Board v5 and running the drsosc.exe version 5.06 on a Window 7 machine. I have performed the voltage and timing calibration.

With test pulses on channel 1 and 2, I collected binary data file with all 4 channels active sampling at 5GSPS. 

Attached is a distribution of the bin_width vs. cell # for all the 4 channels. Note that there are few cells with bin_width < 10 ps. 

Channel 1: bin_width[498] = -0.000348, bin_width[1010]= -0.000348

Channel 2: bin_width[498] = 0.007363

Channel 3: bin_width[498] = 0.007843

Channel 4: bin_width[498] = 0.005948

Is this normal? How can you get negative bin_width? What does negative bin_width means?

I have attached the binary data file for your verification.

Using a test pulse split into two channels of the DRS4 Evaluation Board v5, I looked at the time resolution using a leading edge threshold. The voltage and timing calibration was performed. One method (1) is to linearly interpolate between two points of the raw waveform that is above and below the threshold (this is exactly the algorithm given in read_binary.c in the drs4 source distribution); and another (2) is to use a cubic spline interpolation of the raw waveform. The results I obtained are:

Method 1: dt = 1.298 ns +/- 7.22 ps

Method 2: dt = 1.293 ns +/- 15.48 ps

I am really puzzled why the time resolution of the spline interpolation is about a factor 2 worse than the simple linear interpolation. Has anyone studied the time resolution using similar or other interpolation methods?

Just a follow-up update.

It turns out that I was using a cubic spline interpolation with smoothing. If I required the cubic spline to go through the sampled points, then I obtained similar time resolution as the simple linear interpolation.

Hi, 

I'm running a LIDAR application that requires that every outgoing pulse be captured. My current setup firess sets of 20-50 pulses at 1 ms intervals, about 10 times a second, but only 10-20 pulses a second are captured. 

When I fire at full speed (1KHz - one pulse every ms), about 500-600 pulses a second are captured. 

At the moment, I'm triggering on channel 1 and captureing the data on channel 2. Would it help if I used the external trigger? Is there anything else I can do?

Yoni

Hi, 

I'm trying to do the same thing (get 1 channel with 8192 bins), but I'm having some trouble with it. When I call SetChannelConfig(0, 8, 1) as suggeted, I get output that looks like noise on all readouts. Could you please explain what is supposed to happen in this case? 

I will happily write the code to combine the channels correctly (and debug it) if I can understand what needs to be done. 

(I should mention that my primary concern is a MATLAB interface which I have already written and don't mind sharing when it's complete). 

Yoni Sher

Hi, 

The board is modified (and checks out with the DRSScope program). Could you please point me to the drs_exam_2048.cpp file? I can't seem to fine the most up-to-date git repository....

Thanks, 

Yoni

Hi

 I can't download the software for windows on this website 'www.psi.ch/drs/software-download', there is some mistake when i click on download. 

 If convenient, can you send the software Version 5.0.5 for windows to me? My E-mail address is 'yuhaiyang421@163.com'. Thank you!

Best Regards

Yu

Quick question - what type of connectors are used for the trigger and clock in/out on the v4 eval board?

I need to synchronize two signals. These signals have a different polarity.

I can set triggers on different levels. But I can't set different polarity of triggers.

Now I can set (T1 and T2), I need to set (T1 and (not T2))

Is it possible?

d->SetTriggerLevel(-0.4,0.4,0.0,0.0,false);

d->EnableTrigger(1, 0);  // Enable trigger

d->SetTriggerSource(1<<8 | 1<<9);  // T1 and T2

file DRS.cpp:

int DRSBoard::SetTriggerLevel(double voltage1,double voltage2, double voltage3,double voltage4,bool negative)

{

…

      SetDAC(fDAC_TLEVEL1, voltage1/2 + 0.8);

      SetDAC(fDAC_TLEVEL2, voltage2/2 + 0.8);

…

Hi i am using DRS4 Eval Board V2, How to acquire data to a bin file using it.    

Hello,

Hi,

I found an old thread regarding a fix for DOScreen.cpp for DRS-3.1.0, that fixes an "ambiguous overload problem." Currently when I attempt to build the drs-4.0.0, I get this similar error:

src/DOScreen.cpp:332:39: error: call of overloaded ‘Append(int)’ is ambiguous
 

This section of code is different than what the previous thread was correcting, and though I attempted to apply the logic of the old thread, I haven't fixed this yet.

The following is the code for that section:

-----

329  for (int i=0 ; i<5 ; i++)
330       if (tc & (1<<(i+8))) {
331            if (i < 4)
332              wxst1.Append(wxT('1'+i));
333            else
334              wxst1.Append(wxT('E'));
335           wxst1.Append(wxT('&'));
336        }
337      if (wxst1.Length() > 0)
338         wxst1 = wxst1.Left(wxst1.Length()-1);
339      wxst1.Append(wxT(')'));

------

I've attempted a few fixes, but unfortunately, my understanding of the code is not great, and I haven't managed to fix this yet. Any help would be appreciated.

Thanks,

Zach Miller

 Hi Stefan,

Thanks for the response. I have tried that and it fixes all the lines except the ones that have:

wxst1.Append((char) (wxT('1'+i)));

Those lines still don't compile for me. I've also tried: wxst1.Append((char) (wxT('1'+(char)i))); and wxst1.Append((char) (wxT((char)'1'+i))); as well as a few other combinations of (char) and Append.

I get the same error of: "Call of overloaded "Append(int)" is ambiguous."

Any other help would be greatly appreciated. Thanks!

-Zach

 Aha!

wxst1.Append((char) (wxT('1'+i)));

That one actually works as you initially thought, but you my editor was being picky of (char)wxt... instead of (char) (wxt....). For some reason, it has to have the extra set of parentheses around wxt(). Thank You!

Hi,

Our group had previously heard that a "DRS-5.0" might be on the horizon and that it may have ethernet capabilities as well as 16-input channels (we heard this when ordering the DRS-4). Is this still in the works and accurate information? If so, is there a rough estimate to the "release date?"

Thanks for your time,

Zach Miller

 Thanks, Stefan. That was the information we were looking for.

Cheers.

-Zach

I want to measure the signal from PMT . But it is a current signal, should i just put a series resistance, or use a amplifier to convert it to voltage signal before drs4?  

Can you give me some advice ? 

Hello.

We are designing a waveform sampling board for Si strip array detector ,whose rise time is less than 10 ns, which makes we doubt whether the DRS4 can do more accurate than traditional charge integral circuit for charge measuring.

So we need to know what sort of detectors for physical experiment the DRS4 has been used in?

Can you give me some information? For example, Si strip array detector or CsI scintillator r ball detector ? PMT or APD ?

When Denable and Dwrite is high , the voltage of PLLOUT is 0 V.  And  the Dtap is turn high with no delay when the Denable turns high.

After power up and configuration(the WSR,WCR,CR are all set to 11111111), the readout data is no change whenever the input analog signal and rofs,bias,oofs changes. I have test useing the DAC to supply the Dspeed voltage, and change a new DRS4 chip, but all is the same. The readout data is strange : the first about 100 cells is rise or fall  and the last 900 cells is out of the range of ADC.

So how should I do for debugging the drs4 now.