# TestReport for CDCFE-Fanout-Baord V0.1: <br> Measurement and Grounding issue

## 1. 1-Vpp seems to be fine

* No chassis, No others grounding

Yellow: Input/FuncGen-ch2
Blue: Ch1-out/FanoutBaord
Red: Ch8-out/FanoutBaord

* OPA2674 @1Vpp/10MHz \<External Resistor\>
* 
* OPA3692 @1Vpp/10MHz \<Fixed-Gain/IC internal Resistor\>
* 
* No chassis, No others grounding

## 2. 0.1-Vpp has noise which seems to be due to bad grounding in Lab-521: <br> building grounding (GND in 3 pole power socket)

* OPA2674 @0.1pp/10MHz
* 
* OPA3692 @0.1Vpp/10MHz
* 
* OPA2674 @0.1pp/1MHz
* 
* OPA3692 @0.1Vpp/1MHz
* 

Too bad on low voltage(0.1Vpp):(

## 3. Experiment in Lab-510: <br> Independent grounding

* OPA2674 @0.1pp/10MHz
* 
* OPA3692 @0.1Vpp/10MHz
* 
* OPA2674 @0.1pp/1MHz
* 
* OPA3692 @0.1Vpp/1MHz
* 

Good! Result is the almost same to simulation ;)

## 4. Experiment in Lab-521: <br> (empty VME)chassis grounding

* OPA2674 @0.1pp/10MHz
* 
* OPA3692 @0.1Vpp/10MHz
* 
* OPA2674 @0.1pp/1MHz
* 
* OPA3692 @0.1Vpp/1MHz
* 

A little improvement, 10 MHz is also bad

## 5. Experiment in Lab-521: <br> building grounding rod <br> (seems to has lots of people used in this building)

* OPA2674 @0.1pp/10MHz
* 
* OPA3692 @0.1Vpp/10MHz
* 
* OPA2674 @0.1pp/1MHz
* 
* OPA3692 @0.1Vpp/1MHz
* 

The Same to above (empty VME)chassis grounding

## 6. Lab521 grounding but has touched shileding chassis

* 
* OPA2674 @0.1Vpp/1MHz: Touch chassis
* 
* OPA2674 @0.1Vpp/10MHz: Touch chassis
* 
* OPA2674 @0.1Vpp/1MHz: General
* 
* OPA2674 @0.1Vpp/10MHz: General
* 

## 7. Grounding: Lab510 vs Lab521

* Connect Probe and its GND to GND
* Touch the board and the Aluminum panel -> The same result
* 
* 
* Lab510
* 
* Lab521
* 
* t-domain (Blue-line):
* Can't see any useful infomation
* f-domain/Spectrum (orange-line):
* 10M/1M Hz exist noise
* I guess that testing HF-Analog will get bad result on the lab-510
* Antenna: B4F -> 12F???

## 8. Lab521 grounding but has cover shileding chassis

* 
* OPA2674 @10MHz/0.1Vpp
* 
* OPA2674 @1MHz/0.1Vpp
* 
* OPA2674 @10MHz/0.1Vpp Enlarge
* 
* OPA2674 @1MHz/0.1Vpp Enlarge
* 

###### tags: `CDCFEReport` `DeWei`