I noticed peaks at 900kHz and 10MHz with nothing connected to the DSA815. The 10MHz must be the internal reference, but what could be the 900kHz. LCD display clock? Any thought on this?
I noticed peaks at 900kHz and 10MHz with nothing connected to the DSA815. The 10MHz must be the internal reference, but what could be the 900kHz. LCD display clock? Any thought on this?
[/t] Version?00.01.06.00.05 Date?2013-01-10 1. Optimize the EMI radiation. M 2. Sometimes modify RBW to cause filter shape error. M 3. Solve the problem of option expiration can also continue to use. M 4. OBW measurement is not accurate. M 5. EBW measurement is not accurate. M 6. When you insert U disk, press the print button, the local disk is selected. M 7. When the TG is open, the frequency of 900MHz at a small glitch. M 8. Modify the message from “Invalid option serial number” to “Invalid license key” M 9. The three trial version option installed at the some time, one options expire, the other two can continue to use. M 10. When EMI option is not active, the detector type can not be used. M 11. In the case of high and low temperatures, the LCD screen display error. M 12. Solve the problem some point amplitude difference 2~3dB. M 13. Solve the problem without TG machine can not start. M 14. Solve the problem when Zero Span Marker accuracy is not enough. M |
Looks like that new 10Hz RBW along with 10Hz VBW bring the noise floor down so low that these glitches appear when you may not normally see them at the designed minimum RBW of 100Hz.
QuoteLooks like that new 10Hz RBW along with 10Hz VBW bring the noise floor down so low that these glitches appear when you may not normally see them at the designed minimum RBW of 100Hz.
I wouldn't call it a glitch necessarily; this is actually a sign that the device is working well. The frequencies mentioned are being used by the DSA815 itself, and the signals are being coupled to the input. Even a simple trace on a PCB acts as an antenna; so while perhaps it may be argued that better shielding should have been used, I'd say that overall this device is performing admirably. And at 10Hz RBW that none of us should have available to us anyhow, I have to say, stop complaining, haha.
I guess in so many words that's what I was saying too. I don't see these at the 100Hz setting and It wasn't designed for 10HZ RBW, so I totally agree. It's also good and fun to speculate their source. I think it's safe to say that we love our 815's
Maybe this internal leakage was one of reasons to stop offering 10 Hz RBW as a software option?
Maybe this internal leakage was one of reasons to stop offering 10 Hz RBW as a software option?
I was wondering the same. It is strange that the spurious can't be seen on 100Hz RBW, since all the signals are more than 10dB above the noise floor, and the noise floor should be 10dB up on 100Hz compared to 10Hz RBW. Makes me think that there is something else going on, like a 2nd or 3rd order intermodulation product.
I think is due to the fact that their DSA1030A has 10Hz RBW standard which is 2 or 3 times as expensive.
I want to check the behavior of a micro strip line in a range of 1GHz - 2GHz
Hi Guys,
I have already spend 1 day with my DSA8150TG.
Is this only me who miss a logarithmic frequency scale?
I think this is really important, especial for the filter measurements.
I hope I have just missed to find this option.
Dimitar