| ??? 04/18/08 06:07 Read: times |
#153657 - RF Responding to: ???'s previous message |
Usually RF field is not problem for AD7730, especially in low-density fields. In EMI lab i discover problem with freqwencyies , which are (or near) harmonic of ADC clock.
But these freqwencyes are too high IIRC(far from FM radio) and test strenght is 3V/m - impossible(at least for me) to pre-test. Offcource - case was plastic, not metal. Board was 2-layer. regards |
| Topic | Author | Date |
| Load cell shield | 01/01/70 00:00 | |
| Earth ground | 01/01/70 00:00 | |
| where is Earth ground ... | 01/01/70 00:00 | |
| yes but.. | 01/01/70 00:00 | |
| Why Ain- is grounded... | 01/01/70 00:00 | |
| read datasheet of AD7730 | 01/01/70 00:00 | |
| it's correct | 01/01/70 00:00 | |
| try Yourself and tell us result | 01/01/70 00:00 | |
| Connect the shield to analog ground! | 01/01/70 00:00 | |
| I tend to forget | 01/01/70 00:00 | |
| Good idea! | 01/01/70 00:00 | |
| Analog gnd | 01/01/70 00:00 | |
| Exactly! | 01/01/70 00:00 | |
| Ferrite beads trick! | 01/01/70 00:00 | |
| Loadcell Shield | 01/01/70 00:00 | |
| ground planes | 01/01/70 00:00 | |
| Hhm... | 01/01/70 00:00 | |
| re: hmm | 01/01/70 00:00 | |
| interesting | 01/01/70 00:00 | |
| RF | 01/01/70 00:00 | |
| RF GSM | 01/01/70 00:00 | |
| I use use this | 01/01/70 00:00 | |
Walkie talkies | 01/01/70 00:00 | |
| Load Cell Screens | 01/01/70 00:00 | |
| JUST FOR RECORD | 01/01/70 00:00 | |
| Two enclosures, on safety class I requirements | 01/01/70 00:00 | |
| No proof, of course... | 01/01/70 00:00 | |
| Load cell cable problem | 01/01/70 00:00 | |
| fix it | 01/01/70 00:00 | |
| Problem is | 01/01/70 00:00 | |
| so make Digital Load Cell | 01/01/70 00:00 | |
| good idea | 01/01/70 00:00 | |
| give picture | 01/01/70 00:00 | |
| Screens and cables. | 01/01/70 00:00 | |
| "Fixed Structure" | 01/01/70 00:00 | |
| Fixed? | 01/01/70 00:00 |