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| Advantest R3477 9kHz to 13GHz spectrum analyzer |
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| nctnico:
Both traces are averaged 10 times but the picture shows measurements from two different sources. |
| Wuerstchenhund:
--- Quote from: nctnico on August 19, 2016, 06:16:05 pm ---The R3477's manual doesn't specify the phase noise (at least not directly in dBc). --- End quote --- Apparently it's -100 dBc/Hz (10kHz offset): https://www.custom-cal.com/ModelInfo.aspx?kn=1157&m=ADVANTEST_R3477&srv=Calibration --- Quote ---I think it is needless to say the E4421B's output is noisy indeed but that may be caused by my self made output amplifier. --- End quote --- Why don't you just use your 10MHz reference as input signal? Rb references and a good OCXO has a much lower phase noise than a vector RF generator like the HP ESG. |
| dschiedsch:
Hello ntcnico. I grabbed one of these analyzers from ebay as well. Working fine but I found out that the calibration above 3.5GHz is off. I guess the cal for the YIG Filter is not good anymore. (Tested against a RS-signal generator) I think one can calibrate this through the service menu. However I also don't have the password. Did you have any success finding the password on the flash disc? regards gernot |
| nctnico:
I already posted it earlier: --- Quote from: nctnico on August 15, 2016, 03:03:54 pm ---The code to enter the service mode: 17320504 --- End quote --- Use at your own risk though! I'd check if there isn't some frequency compensation enabled in one of the many menus. |
| dschiedsch:
Hi yeah thought about that and tried to put everything back to default also do you know if the calibration is stored on the disk? if yes then a backup of the disk should minimize the risk of bricking the device |
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