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Mon Oct 10 11:30:37 2016, Danny Petschke, 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

Attachment 2:

Chn2_Chn3_1ns_delay_scaled.png 271 kB Uploaded Mon Oct 10 12:39:47 2016 | Hide | Hide all