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Entry  Sun Oct 9 10:43:35 2016, Danny Petschke, time difference between 2 channels only ~30-35ps @ 5GSmples/s 
    Reply  Sun Oct 9 11:39:18 2016, Stefan Ritt, time difference between 2 channels only ~30-35ps @ 5GSmples/s 
       Reply  Mon Oct 10 11:30:37 2016, Danny Petschke, time difference between 2 channels only ~30-35ps @ 5GSmples/s allChannels_zero_scaled.pngChn2_Chn3_1ns_delay_scaled.png
          Reply  Mon Oct 10 12:03:27 2016, Stefan Ritt, time difference between 2 channels only ~30-35ps @ 5GSmples/s Screen_Shot_2016-10-10_at_12.01.03_.pngScreen_Shot_2016-10-10_at_12.01.57_.pngScreen_Shot_2016-10-10_at_12.36.48_.png
             Reply  Tue Oct 11 09:04:33 2016, Danny Petschke, time difference between 2 channels only ~30-35ps @ 5GSmples/s 
                Reply  Tue Oct 11 09:20:04 2016, Stefan Ritt, time difference between 2 channels only ~30-35ps @ 5GSmples/s 
Message ID: 544     Entry time: Mon Oct 10 11:30:37 2016     In reply to: 543     Reply to this: 545
Author: Danny Petschke 
Subject: time difference between 2 channels only ~30-35ps @ 5GSmples/s 

Hello Stefan,

Chn2 & Chn3 were used for delay-determination as you can see on the second picture.

 

The second picture shows all 4 Channels without any voltage input.

On Channel 4 streaks (red circle) occur often and Channel 1 has totally different Offset (Picture 1). 

Thanks

 

Stefan Ritt wrote:

Can you post a screenshot of your measurement?

Stefan

Danny Petschke wrote:

(Board Type:9, DRS4)

Hello,

I´m trying to reach the timig resolution of about 2.5ps as written in the manual. 

My settings are:

5GSamples/s

+/-0.5V

I followed the instructions of the manual. The chip was warm and ran about 10h. Then, Timing- followed by Voltage-Calibration.

The test-signal is a splittet sine-wave of 20MHz (function-generator) brought on A0 and A1 (A1 signal is delayed by 1ns-cable).

I´ve been testing different trigger-logic: (Chn1 AND Chn2), (Chn1 OR Chn2) and only Chn1 or Chn2. 

Trigger-levels were changed too.

All setups show the same result of 1.009ns +/- 30-35ns (results from the DRS-Oscilloscope).

What is wrong from my side? 

Thanks a lot for your help

 

 

Attachment 1: allChannels_zero_scaled.png  194 kB  Uploaded Mon Oct 10 12:37:53 2016  | Hide | Hide all
allChannels_zero_scaled.png
Attachment 2: Chn2_Chn3_1ns_delay_scaled.png  271 kB  Uploaded Mon Oct 10 12:39:47 2016  | Hide | Hide all
Chn2_Chn3_1ns_delay_scaled.png
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